Biggest changeAMECO-North America 95 146 112 Investments in partnerships and joint ventures (53) (80) (29) Other 19 (9) 5 Investing cash flow (78) (122) (41) FINANCING CASH FLOW Proceeds from NuScale de-SPAC transaction 341 — — Proceeds from sale of NuScale interest 107 — — Proceeds from issuance of CPS — 582 — Purchases and retirement of debt (41) (525) — Debt extinguishment costs — (2) — Dividends paid (on CPS in 2022 and 2021 and common stock in 2020) (39) (19) (29) Distributions paid to NCI (60) (109) (23) Capital contributions by NCI 21 202 110 Other (14) (7) (10) Financing cash flow 315 122 48 Effect of exchange rate changes on cash (38) (15) 9 Increase (decrease) in cash and cash equivalents 230 10 202 Cash and cash equivalents at beginning of year 2,209 2,199 1,997 Cash and cash equivalents at end of year $ 2,439 $ 2,209 $ 2,199 Cash paid during the year for: Interest $ 54 $ 90 $ 66 Income taxes (net of refunds) 99 75 65 Operating Activities Cash flows from operating activities result primarily from our EPC activities and are affected by our earnings level and changes in working capital associated with such activities.
Biggest changeYear Ended December 31, (in millions) 2023 2022 2021 OPERATING CASH FLOW $ 212 $ 31 $ 25 INVESTING CASH FLOW Proceeds from sales and maturities (purchases) of marketable securities (141) (64) (104) Capital expenditures (106) (75) (75) Proceeds from sales of assets (net of cash divested) (5) 95 146 Investments in partnerships and joint ventures (33) (53) (80) Other 8 19 (9) Investing cash flow (277) (78) (122) FINANCING CASH FLOW Proceeds from issuance of 2029 Notes, net of issuance costs 560 — — Capped call transactions related to 2029 Notes (73) — — Purchases and retirement of debt (249) (41) (525) Proceeds from NuScale de-SPAC transaction — 341 — Proceeds from sale of NuScale interest — 107 — Proceeds from issuance of CPS — — 582 Dividends paid on CPS (29) (39) (19) Make-whole payment on conversion of CPS (27) — — Distributions paid to NCI (53) (60) (109) Capital contributions by NCI 10 21 202 Other (12) (14) (9) Financing cash flow 127 315 122 Effect of exchange rate changes on cash 18 (38) (15) Increase in cash and cash equivalents 80 230 10 Cash and cash equivalents at beginning of year 2,439 2,209 2,199 Cash and cash equivalents at end of year $ 2,519 $ 2,439 $ 2,209 Cash paid during the year for: Interest $ 53 $ 54 $ 90 Income taxes (net of refunds) 169 99 75 Noncash investing and financing activities: Marketable securities transferred to trustee to discharge the 2024 Notes $ 262 $ — $ — Debt assumed by buyer of Stork Latin America 19 — — 38 Table of Contents Operating Activities Cash flows from operating activities result primarily from our EPC activities and are affected by our earnings levels and changes in working capital associated with such activities.
Working capital requirements also vary by project and the payments terms agreed to with our clients, vendors and subcontractors. Most contracts require payments as the projects progress. Additionally, certain projects receive advance payments from clients.
Working capital requirements also vary by project and the payment terms agreed to with our clients, vendors and subcontractors. Most contracts require payments as the projects progress. Additionally, certain projects receive advance payments from clients.
We have a common stock repurchase program, authorized by our Board of Directors, to purchase shares in the open market or privately negotiated transactions at our discretion. As of December 31, 2022, over 10 million shares could still be purchased under the existing stock repurchase program, although we do not have any immediate intent to begin such repurchases.
We have a common stock repurchase program, authorized by our Board of Directors, to purchase shares in the open market or privately negotiated transactions at our discretion. As of December 31, 2023, over 10 million shares could still be purchased under the existing stock repurchase program, although we do not have any immediate intent to begin such repurchases.
Non-U.S. cash and cash equivalents exclude deposits of U.S. legal entities that are invested in offshore, overnight accounts or short-term time deposits, to which there is unrestricted access. 40 Table of Contents In evaluating our liquidity needs, we consider cash and cash equivalents held by our consolidated variable interest entities (joint ventures and partnerships).
Non-U.S. cash and cash equivalents exclude deposits of U.S. legal entities that are invested in offshore, overnight accounts or short-term time deposits, to which there is unrestricted access. 37 Table of Contents In evaluating our liquidity needs, we consider cash and cash equivalents held by our consolidated variable interest entities (joint ventures and partnerships).
We are often required to use fair value measurement techniques with inputs that require the use of estimates and involve significant judgment.
We are required to use fair value measurement techniques with inputs that require the use of estimates and involve significant judgment.
These circumstances include: • Impairment testing of goodwill and indefinite-lived intangibles when quantitative analysis is deemed necessary • Impairment testing of long-lived assets when impairment indicators are present • Impairment testing of investments as part of other than temporary impairment assessments when impairment indicators are present • Fair value assessments of businesses held for sale that are reported at fair value less cost to sell 39 Table of Contents When performing quantitative fair value or impairment evaluations, we estimate the fair value of our assets by considering the results of either or both income-based and market-based valuation approaches.
These circumstances include: • Impairment testing of goodwill and indefinite-lived intangibles when quantitative analysis is deemed necessary • Impairment testing of long-lived assets when impairment indicators are present • Impairment testing of investments as part of other than temporary impairment assessments when impairment indicators are present • Fair value assessments of businesses held for sale that are reported at fair value less cost to sell When performing quantitative fair value or impairment evaluations, we estimate the fair value of our assets by considering the results of either or both income-based and market-based valuation approaches.
We did not consider any cash to be permanently reinvested outside the U.S. as of December 31, 2022 and 2021, other than unremitted earnings required to meet our working capital and long-term investment needs in non-U.S. foreign jurisdictions where we operate.
We did not consider any cash to be permanently reinvested outside the U.S. as of December 31, 2023 and 2022, other than unremitted earnings required to meet our working capital and long-term investment needs in non-U.S. foreign jurisdictions where we operate.
The weighted-average cost of capital is comprised of the cost of equity and the cost of debt with a weighting for each that reflects our current capital structure which can be significantly impacted by volatility in interest rates as seen during 2022.
The weighted-average cost of capital is comprised of the cost of equity and the cost of debt with a weighting for each that reflects our current capital structure which can be significantly impacted by volatility in interest rates as seen during 2023.
Under the income approach, we prepare a discounted cash flow valuation model using recent forecasts and compare the estimated fair value of each asset to its carrying value. Cash flow forecasts are discounted using the appropriate weighted-average cost of capital at the date of evaluation.
Under the income approach, we prepare a discounted cash flow valuation model using recent forecasts and compare the estimated fair value of each asset 36 Table of Contents to its carrying value. Cash flow forecasts are discounted using the appropriate weighted-average cost of capital at the date of evaluation.
These amounts (which totaled $706 million and $630 million as of December 31, 2022 and 2021, respectively) were not necessarily readily available for general purposes. We do not include our share of cash held by our proportionately consolidated joint ventures and partnerships in our consolidated cash balances even though these amounts may be significant.
These amounts (which totaled $491 million and $706 million as of December 31, 2023 and 2022, respectively) were not necessarily readily available for general purposes. We do not include our share of cash held by our proportionately consolidated joint ventures and partnerships in our consolidated cash balances even though these amounts may be significant.
We also consider the extent to which client advances (which totaled $102 million and $127 million as of December 31, 2022 and 2021, respectively) are likely to be sustained or consumed over the near term for project execution activities and the cash flow requirements of our various foreign operations.
We also consider the extent to which client advances (which totaled $80 million and $102 million as of December 31, 2023 and 2022, respectively) are likely to be sustained or consumed over the near term for project execution activities and the cash flow requirements of our various foreign operations.
Cash balances as of December 31, 2022 and 2021 include cash and cash equivalents and marketable securities held by NuScale of $338 million and $90 million, respectively. Cash and cash equivalents are held in numerous accounts throughout the world to fund our global project execution activities.
Cash balances as of December 31, 2023 and 2022 include cash and cash equivalents and marketable securities held by NuScale of $118 million and $338 million, respectively. Cash and cash equivalents are held in numerous accounts throughout the world to fund our global project execution activities.
This credit facility contains customary financial covenants, including a debt-to-capitalization ratio that cannot exceed 0.60 to 1.00, a limitation on the aggregate amount of debt of the greater of $750 million or €750 million for our subsidiaries, and a minimum liquidity threshold of $1.2 billion, all as defined in the amended credit facility.
This credit facility contains customary financial covenants, including a debt-to-capitalization ratio that cannot exceed 0.60 to 1.00, a limitation on the aggregate amount of debt of the greater of $750 million or €750 million for our subsidiaries, and a minimum liquidity threshold of $1.2 billion, all as defined in the amended credit facility, which may be reduced to $1.0 billion upon the repayment of debt.
Borrowings under the facility, which may be denominated in USD, EUR, GBP or CAD, bear interest at a base rate, plus an applicable borrowing margin. As of December 31, 2022 and through the issuance of this 10-K, we had not made any borrowings under our credit line and maintained a borrowing capacity of $819 million.
Borrowings under the facility, which may be denominated in USD, EUR, GBP or CAD, bear interest at a base rate, plus an applicable borrowing margin. As of December 31, 2023 and through the issuance of this 10-K, we had not made any borrowings under our credit facility.
These variable amounts generally are awarded upon achievement of certain performance metrics, program milestones or cost targets and can be based upon customer discretion. We estimate variable consideration at the most likely amount to which we expect to be entitled upon completion of a project.
Certain variable consideration, such as award and incentive fees, generally are awarded upon achievement of certain performance metrics, program milestones or cost targets and can be based upon customer discretion. We estimate variable consideration at the most likely amount to which we expect to be entitled upon completion of a project.
Net Interest Income (Expense) The increase in net interest income during 2022 was primarily due to an increase in interest rates on cash deposits including at our joint ventures in Canada and Mexico as well as the redemption of $509 million of 2023 and 2024 Notes in the latter half of 2021.
Net Interest Income (Expense) The increase in net interest income during 2023 was primarily due to an increase in interest rates earned on cash deposits including at our joint ventures in Canada and Mexico as well as the interest savings following the redemption of the 2023 Notes.
Non-U.S. cash and cash equivalents amounted to $1.1 billion as of December 31, 2022 and $992 million as of December 31, 2021.
Non-U.S. cash and cash equivalents amounted to $1.1 billion as of both December 31, 2023 and 2022.
We recognize our engineering and construction contract revenue over time as we provide services to satisfy our performance obligations. We generally use the cost-to-cost percentage-of-completion measure of progress as it best depicts how control transfers to our clients. The cost-to-cost approach measures progress towards completion based on the ratio of cost incurred to date compared to total estimated contract cost.
We generally use the cost-to-cost percentage-of-completion measure of progress as it best depicts how control transfers to our clients. The cost-to-cost approach measures progress towards completion based on the ratio of cost incurred to date compared to total estimated contract cost.
While we experienced reductions in demand for certain services and the delay or abandonment of ongoing or anticipated projects during the COVID pandemic, our ability to win work was not materially impacted by COVID during 2022.
While we experienced reductions in demand for certain services and the delay or abandonment of ongoing or anticipated projects during the COVID pandemic, our ability to win work was not materially impacted by COVID during 2023, as most of our markets and our clients' spending patterns have returned to pre-COVID norms.
Energy Solutions Revenue in 2022 increased due to the ramp up of execution activities on a chemicals project in China, recently awarded mid-scale LNG projects and refinery projects in Mexico partially offset by declines in the volume of execution activity for projects nearing completion.
Energy Solutions Revenue in 2023 increased due to the ramp up of execution activities on our refinery projects in Mexico, chemicals projects in China and mid-scale LNG projects. These increases to revenue were partially offset by a decline in execution activity for projects nearing completion and lower revenue on an LNG project.
In 2022, we finalized the settlement of the remaining obligations of this plan and recognized a gain on settlement of $42 million. Segment Operations We provide professional services in the fields of EPC, fabrication and modularization, and project management services, on a global basis and serve a diverse set of industries worldwide.
In 2022, we finalized the settlement of the remaining obligations of this plan and recognized a gain on settlement of $42 million. Segment Operations We are one of the larger global professional services firms providing EPC, fabrication and modularization, and project management services.
Our credit facility contains provisions that will require us to provide collateral to secure the facility should we be downgraded to BB by S&P and Ba2 by Moody's, which is a two notch downgrade from our current S&P credit rating of BBB- and a one notch downgrade from our current Moody's credit rating of Ba1.
We regularly review our sources and uses of liquidity and may pursue opportunities to address our liquidity needs. Our credit facility contains provisions that will require us to provide collateral to secure the facility should we be downgraded to BB by S&P and Ba2 by Moody's, which is a one notch downgrade from both agencies' current ratings.
Backlog included $3.9 billion and $445 million of unfunded government contracts as of December 31, 2022 and 2021, respectively. Unfunded backlog reflects our estimate of future revenue under awarded government contracts for which funding has not yet been appropriated. 37 Table of Contents Other Other includes the operations of NuScale, Stork and the remaining AMECO business.
Unfunded backlog reflects our estimate of future revenue under awarded government contracts for which funding has not yet been appropriated. 34 Table of Contents Other Other includes the operations of NuScale, Stork and the remaining AMECO business prior to their sale.
Although backlog reflects business that is considered to be firm, cancellations, deferrals or scope adjustments may occur. Backlog is adjusted to reflect any known project cancellations, revisions to project scope and cost, foreign currency exchange fluctuations and project deferrals, as appropriate. Backlog differs from RUPO discussed elsewhere.
Backlog is adjusted to reflect any known project cancellations, revisions to project scope and cost, foreign currency exchange fluctuations and project deferrals, as appropriate. Backlog differs from RUPO discussed elsewhere in this 10-K.
The reversal relates primarily to remeasurement under held-and-used impairment criteria, for which CTA balances are excluded from carrying value. Gain (Loss) on Pension Settlement In 2021, we settled the majority of the obligations of our largest DB plan, which provided retirement benefits to certain employees in the Netherlands, and recognized a loss on settlement of $198 million.
Gain (Loss) on Pension Settlement In 2021, we settled the majority of the obligations of our then largest DB plan, which provided retirement benefits to certain employees in the Netherlands, and recognized a loss on settlement of $198 million.
This policy focuses on, in order of priority, the preservation of capital, maintenance of liquidity and maximization of yield. These investments may include money market funds, bank deposits placed with highly-rated financial institutions, repurchase agreements that are fully collateralized by U.S. Government-related securities, high-grade commercial paper and high quality short-term and medium-term fixed income securities.
These investments may include money market funds, bank deposits placed with highly-rated financial institutions, repurchase agreements that are fully collateralized by U.S. Government-related securities, high-grade commercial paper and high quality short-term and medium-term fixed income securities. Capital expenditures were primarily related to construction equipment on certain infrastructure projects as well as expenditures for facilities and investments in IT.
G&A YEAR ENDED DECEMBER 31, (in millions) 2022 2021 2020 G&A Compensation $ 145 $ 164 $ 122 SEC investigation / Internal review costs 38 27 42 Facilities 16 14 15 Exit costs 7 — — Reserve for legacy legal claims 5 — — Severance 1 8 4 Gain on sale of land and buildings (11) (13) — Other 36 26 32 G&A $ 237 $ 226 $ 215 The decrease in compensation expense in 2022 compared to 2021 was driven by $6 million of salary reductions associated with lower headcount and $10 million in lower incentive compensation for our executives.
G&A YEAR ENDED DECEMBER 31, (in millions) 2023 2022 2021 G&A Compensation $ 165 $ 145 $ 164 SEC investigation / Internal review costs 1 38 27 Facilities 14 16 14 Exit costs 6 7 — Reserve for legacy legal claims 3 5 — Severance 5 1 8 Gain on sale of land and buildings — (11) (13) Other 38 36 26 G&A $ 232 $ 237 $ 226 The increase in compensation expense in 2023 was driven by higher performance-based compensation, including annual bonus projections and the effects of our higher stock price on stock-based liability awards.
Under the market approach, we consider market information such as multiples of comparable publicly traded companies and/or completed sales transactions to develop or validate our fair value conclusions, when appropriate and available. As part of our assessment of goodwill in 2022, we recognized impairment expense of $40 million in our Other segment.
Under the market approach, we consider market information such as multiples of comparable publicly traded companies and/or completed sales transactions to develop or validate our fair value conclusions, when appropriate and available. Recent Accounting Pronouncements Item is described more fully in the Notes to Financial Statements.
Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations The following discussion and analysis should be read in conjunction with our financial statements.
Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations The following discussion and analysis should be read in conjunction with our financial statements. A discussion and analysis of the operating results of 2022 compared to 2021 are included in our 2022 10-K and have not been repeated in this 10-K.
Other borrowings (debt repayments) represent short-term bank loans and other financing arrangements associated with Stork. Distributions paid to holders of NCI represent cash outflows to partners of consolidated partnerships or joint ventures created primarily for the execution of single contracts or projects. Distributions in 2022 primarily related to a transportation joint venture.
Distributions paid to holders of NCI represent cash outflows to partners of consolidated partnerships or joint ventures created primarily for the execution of single contracts or projects. Distributions in 2023 related to a Mission Solutions joint venture and 2 infrastructure joint ventures.
We believe that for at least the next 12 months, cash generated from operations, along with our unused credit capacity and cash position, is sufficient to support operating requirements. We regularly review our sources and uses of liquidity and may pursue opportunities to address our liquidity needs.
We have committed and uncommitted lines of credit available for revolving loans and letters of credit. We believe that for at least the next 12 months, anticipated cash generated from operations, along with our unused credit capacity and cash position, is sufficient to support operating requirements and debt maturities.
The preparation of our financial statements requires management to make estimates and judgments that affect the reported amounts of assets, liabilities, revenue and expenses, and related disclosure of contingent assets and liabilities.
The preparation of our financial statements requires management to make estimates and judgments that affect the reported amounts of assets, liabilities, revenue and expenses, and related disclosure of contingent assets and liabilities. Estimates are based on information available through the date of the issuance of the financial statements and, accordingly, actual results in future periods could differ from these estimates.
Impairment Impairment expense, included in Cont Ops, for 2022, 2021 and 2020 is summarized as follows: Year Ended December 31, (in millions) 2022 2021 2020 Impairment: Goodwill associated with the Other reporting unit $ 40 $ 13 $ 169 Intangible customer relationship associated with Stork — — 27 Energy Solutions' equity method investments — 28 86 Information technology assets — 16 16 Fair value adjustment of Stork and AMECO assets (63) 233 74 Total impairment $ (24) $ 290 $ 372 During 2022, we reversed $63 million of impairment originally recognized in 2021 when our Stork and AMECO businesses were classified as held for sale.
Impairment Impairment expense, included in Cont Ops, for 2022 and 2021 is summarized as follows: Year Ended December 31, (in millions) 2022 2021 Impairment: Goodwill associated with Stork and AMECO $ 40 $ 13 Energy Solutions' equity method investments — 28 IT assets — 16 Fair value adjustment of Stork and AMECO assets (63) 233 Total impairment $ (24) $ 290 We did not recognize any material impairment expense in 2023.
We maintain cash reserves and borrowing facilities to provide additional working capital in the event that a project’s net operating cash outflows exceed its available cash balances.
We maintain cash reserves and borrowing facilities to provide additional working capital in the event that a project’s net operating cash outflows exceed its available cash balances. As of December 31, 2023, our backlog included $1.3 billion for loss projects, including $344 million of estimated unfunded losses associated therewith.
These actions resulted in a reduction of risk related to the exposure to liquidated damages in the project forecasts. 33 Table of Contents YEAR ENDED DECEMBER 31, (in millions) 2022 2021 2020 Revenue Energy Solutions $ 5,872 $ 4,956 $ 5,271 Urban Solutions 3,921 4,416 5,854 Mission Solutions 2,289 3,063 3,033 Other 1,662 1,721 1,630 Total revenue $ 13,744 $ 14,156 $ 15,788 Segment profit (loss) $ and margin % Energy Solutions $ 301 5.1 % $ 250 5.0 % $ 169 3.2 % Urban Solutions 3 0.1 % 38 0.9 % 161 2.8 % Mission Solutions 136 5.9 % 155 5.1 % 87 2.9 % Other (13) NM (28) NM (75) NM Total segment profit (loss) $ and margin % (1) $ 427 3.1 % $ 415 2.9 % $ 342 2.2 % G&A (237) (226) (215) Impairment 24 (290) (380) Gain (loss) on pension settlement 42 (198) — Foreign currency gain (loss) 25 (13) (47) Interest income (expense), net 35 (73) (46) Earnings (loss) from Cont Ops attributable to NCI (72) 39 68 Earnings (loss) from Cont Ops before taxes 244 (346) (278) Income tax (expense) benefit (171) (20) (23) Net earnings (loss) from Cont Ops 73 (366) (301) Less: Net earnings (loss) from Cont Ops attributable to NCI (72) 39 68 Net earnings (loss) from Cont Ops attributable to Fluor 145 (405) (369) Less: Dividends on CPS 39 24 — Net earnings (loss) from Cont Ops available to Fluor common stockholders $ 106 $ (429) $ (369) New awards Energy Solutions $ 6,511 $ 3,313 $ 2,013 Urban Solutions 6,799 2,721 3,563 Mission Solutions 5,347 2,718 1,883 Other 1,158 1,218 1,546 Total new awards $ 19,815 $ 9,970 $ 9,005 New awards related to projects located outside of the U.S. 46 % 61 % 58 % (in millions) December 31, 2022 December 31, 2021 Backlog Energy Solutions $ 9,134 $ 9,324 Urban Solutions 9,900 7,048 Mission Solutions 5,666 2,562 Other 1,349 1,866 Total backlog $ 26,049 $ 20,800 Backlog related to projects located outside of the U.S. 49 % 65 % Backlog related to lump-sum projects 37 % 59 % (1) Total segment profit (loss) is a non-GAAP financial measure.
We recognized a $93 million negative earnings impact on sale, including $33 million associated with foreign currency translation. 30 Table of Contents Results of Operations YEAR ENDED DECEMBER 31, (in millions) 2023 2022 2021 Revenue Energy Solutions $ 6,307 $ 5,872 $ 4,956 Urban Solutions 5,262 4,373 4,832 Mission Solutions 2,655 2,289 3,063 Other 1,250 1,210 1,305 Total revenue $ 15,474 $ 13,744 $ 14,156 Segment profit (loss) $ and margin % Energy Solutions $ 381 6.0 % $ 301 5.1 % $ 250 5.0 % Urban Solutions 268 5.1 % 17 0.4 % 41 0.9 % Mission Solutions 116 4.4 % 136 5.9 % 155 5.1 % Other (228) NM (27) NM (31) NM Total segment profit $ and margin % (1) $ 537 3.5 % $ 427 3.1 % $ 415 2.9 % G&A (232) (237) (226) Impairment — 24 (290) Gain (loss) on pension settlement — 42 (198) Foreign currency gain (loss) (98) 25 (13) Interest income (expense), net 168 35 (73) Earnings (loss) from Cont Ops attributable to NCI (60) (72) 39 Earnings (loss) from Cont Ops before taxes 315 244 (346) Income tax (expense) benefit (236) (171) (20) Net earnings (loss) from Cont Ops 79 73 (366) Less: Net earnings (loss) from Cont Ops attributable to NCI (60) (72) 39 Net earnings (loss) from Cont Ops attributable to Fluor 139 145 (405) Less: Dividends on CPS 29 39 24 Less: Make-whole payment on conversion of CPS 27 — — Net earnings (loss) from Cont Ops available to Fluor common stockholders $ 83 $ 106 $ (429) New awards Energy Solutions $ 6,871 $ 6,512 $ 3,313 Urban Solutions 10,141 6,900 2,877 Mission Solutions 1,055 5,347 2,718 Other 1,461 1,056 1,062 Total new awards $ 19,528 $ 19,815 $ 9,970 New awards related to projects located outside of the U.S. 76 % 46 % 61 % (in millions) December 31, 2023 December 31, 2022 Backlog (2)(3) Energy Solutions $ 9,722 $ 9,134 Urban Solutions 14,848 10,270 Mission Solutions 3,945 5,666 Other 926 979 Total backlog $ 29,441 $ 26,049 Backlog related to projects located outside of the U.S. 62 % 49 % Backlog related to lump-sum projects 24 % 37 % 31 Table of Contents (1) Total segment profit is a non-GAAP financial measure.
New awards in 2021 included a large life sciences project in Europe. New awards in 2020 included a highway project in Texas. Backlog increased during 2022 due to the new award activity. Backlog declined during 2021 due to the cancellation of a steel project coupled with lower new awards. Our staffing business does not report new awards or backlog.
New awards significantly increased in 2023 due to awards for a large mining project, a metals project and a life sciences project. Backlog increased during 2023 due to the new award activity. Our staffing business does not report new awards or backlog. Results for the fourth quarter of 2023.
Our operating cash flow is typically lower in the first quarter of each year due to the timing of payout of employee incentive awards from the prior year. Investing Activities We hold cash in bank deposits and marketable securities which are governed by our investment policy.
Our operating cash flow is typically lower in the first quarter of each year due to the timing of payout of employee incentive awards from the prior year. In 2024, we expect to receive a significant tax refund. Investing Activities 2023 investing activities were significantly impacted by the purchase of U.S.
We believe that total segment profit (loss) provides a meaningful perspective on our results as it is the aggregation of individual segment profit (loss) measures that we use to evaluate and manage our performance. During the first quarter of 2022, we suspended any new investment in our Russian operations.
We believe that total segment profit provides a meaningful perspective on our results as it is the aggregation of individual segment profit measures that we use to evaluate and manage our performance. (2) Backlog represents the total amount of revenue we expect to record in the future based upon contracts that have been awarded to us.
During 2022, consolidated revenue declined slightly due to volume declines on projects which were completed or nearing completion in the Urban Solutions and Mission Solutions segments.
Consolidated revenue increased in 2023 due to the ramp up of execution activities on several projects in Energy Solutions, Urban Solutions and Mission Solutions partially offset by declines in the volume of execution activity for projects which were completed or nearing completion.
A reconciliation of U.S. statutory federal income tax expense (benefit) to income tax expense (benefit) from Cont Ops follows: Year Ended December 31, (in millions) 2022 2021 2020 U.S. statutory federal tax expense (benefit) $ 51 $ (73) $ (58) Increase (decrease) in taxes resulting from: State and local income taxes — 12 (12) Other permanent items, net 10 36 — NCI 15 (7) (9) Foreign tax differential, net (106) (11) 38 Valuation allowance, net 194 103 167 Other changes to uncertain tax positions — 1 7 Stranded tax effects from AOCI — (52) — CARES Act benefit 2 2 (125) Other, net 5 9 15 Total income tax expense $ 171 $ 20 $ 23 Our results were significantly impacted by evolving foreign currency rates in 2022.
A reconciliation of U.S. statutory federal income tax expense (benefit) to income tax expense (benefit) follows: Year Ended December 31, (in millions) 2023 2022 2021 U.S. statutory federal tax expense (benefit) $ 66 $ 51 $ (73) Increase (decrease) in taxes resulting from: State and local income taxes 6 — 12 Goodwill Impairment — 10 36 Sale of foreign subsidiaries (10) — — NCI 13 15 (7) Foreign tax differential, net 48 (106) (11) Valuation allowance, net 122 194 103 Stranded tax effects from AOCI — — (52) Other, net (9) 7 12 Total income tax expense $ 236 $ 171 $ 20 32 Table of Contents In 2021, the Organization for Economic Cooperation and Development announced a framework on base erosion and profit shifting.
Investments in unconsolidated partnerships and joint ventures in 2020 included capital contributions to two infrastructure joint ventures in the United States. Financing Activities As a result of the reverse recapitalization, NuScale recognized cash of $341 million, consisting of $235 million in PIPE funding and $145 million in cash in trust, partially offset by transaction costs of $39 million.
As a result of the reverse recapitalization, NuScale recognized cash of $341 million during 2022, consisting of $235 million in PIPE funding and $145 million in cash in trust, partially offset by transaction costs of $39 million. In April 2022, we sold approximately 5% of the ownership of NuScale to Japan NuScale Innovation, LLC for $107 million.
LIQUIDITY AND CAPITAL RESOURCES Our liquidity arises from available cash and cash equivalents and marketable securities, cash generated from operations, capacity under our credit facilities and, when necessary, access to capital markets. We have committed and uncommitted lines of credit available for revolving loans and letters of credit.
Litigation and Matters in Dispute Resolution Item is described more fully in the Notes to Financial Statements. LIQUIDITY AND CAPITAL RESOURCES Our liquidity arises from available cash and cash equivalents and marketable securities, cash generated from operations, capacity under our credit facilities and, when necessary, access to capital markets.
RUPO includes only the amount of revenue we expect to recognize under contracts with definite terms and substantive termination provisions.
Backlog includes the amount of revenue we expect to recognize under ongoing operations and maintenance contracts for the remainder of the current year renewal period plus up to 3 additional years if renewal is considered to be probable, while RUPO includes only the amount of revenue we expect to recognize under contracts with definite terms and substantive termination provisions.
We expect to address the maturity of the 2024 Notes through available liquidity, cash generated by our operations or via a new securities issue. As of December 31, 2022, letters of credit totaling $394 million were outstanding under our $1.8 billion credit facility, which was amended in February 2023 to extend the maturity to February 2026.
As of December 31, 2023, letters of credit totaling $477 million were outstanding under our $1.8 billion credit facility, which matures in February 2026 and was amended in August 2023 to permit the issuance of the 2029 Notes.
Letters of Credit As of December 31, 2022, letters of credit totaling $394 million were outstanding under committed lines of credit and letters of credit totaling $909 million were outstanding under uncommitted lines of credit. Letters of credit are ordinarily provided to indemnify our clients if we fail to perform our obligations under our contracts.
Letters of credit are ordinarily provided to indemnify our clients if we fail to perform our obligations under our contracts. Surety bonds may be used as an alternative to letters of credit.
The change in segment profit margin in 2022 and 2021 reflects these same factors. New awards in 2022 increased due to a large award for a chemicals project in China and mid-scale LNG projects in North America. New awards in 2021 increased due to awards for a refinery project in Mexico.
The increase in segment profit margin in 2023 reflects these same factors. 33 Table of Contents New awards and backlog increased in 2023 due to awards for reimbursable EPCM contracts for 2 large chemicals projects in North America as well as a chemicals project in Poland. Results for the fourth quarter of 2023.
Surety bonds may be used as an alternative to letters of credit. Guarantees The maximum potential amount of future payments that we could be required to make under outstanding performance guarantees, which represents the remaining cost of work to be performed, was estimated to be $15 billion as of December 31, 2022.
Guarantees The maximum potential amount of future payments that we could be required to make under outstanding performance guarantees, which represents the remaining cost of work to be performed, was estimated to be $15 billion as of December 31, 2023. 40 Table of Contents Financial guarantees, made in the ordinary course of business in certain limited circumstances, are entered into with financial institutions and other credit grantors and generally obligate us to make payment in the event of a default by the borrower.
Estimates are based on information available through the 38 Table of Contents date of the issuance of the financial statements and, accordingly, actual results in future periods could differ from these estimates. Significant judgments and estimates used in the preparation of our financial statements apply to the following critical accounting policies: Revenue Recognition for Long-Term Contracts.
Significant judgments and estimates used in the preparation of our financial statements apply to the following critical accounting policies: 35 Table of Contents Revenue Recognition for Long-Term Contracts. We recognize our engineering and construction contract revenue over time as we provide services to satisfy our performance obligations.
Mission Solutions Revenue in 2022 decreased primarily due to the completion of a DOE contract in 2021, the completion of a contingency and humanitarian support project in the first quarter of 2022 and the closure of LOGCAP in Afghanistan partially offset by increased execution activities on three DOE contracts. Revenue in 2021 was flat compared to 2020.
Mission Solutions Revenue increased in 2023 due to increased execution activities for 3 DOE contracts, 2 defense contracts, a nuclear power project that was recently terminated and FEMA hurricane support. The increase in revenue was partially offset by the completion of a contingency and humanitarian support project in 2022 and an airfield construction project in early 2023.
YEAR ENDED DECEMBER 31, (in millions) 2022 2021 2020 NuScale (1) $ (73) $ (69) $ (84) Stork 59 35 (6) AMECO 1 6 15 Segment profit (loss) $ (13) $ (28) $ (75) (1) NuScale expenses included in the determination of segment profit were as follows: NuScale expenses $ (179) $ (169) $ (159) Less: DOE reimbursable expenses 74 69 71 NuScale expenses, net (105) (100) (88) Less: Attributable to NCI 32 31 4 NuScale profit (loss) $ (73) $ (69) $ (84) The increase in NuScale expenses during 2022 and 2021 was primarily due to an increase in compensation. 2022 also had a slight increase in insurance and R&D.
YEAR ENDED DECEMBER 31, (in millions) 2023 2022 2021 NuScale (1) $ (106) $ (73) $ (69) Stork (55) 45 32 AMECO (67) 1 6 Segment profit (loss) $ (228) $ (27) $ (31) (1) NuScale expenses included in the determination of segment profit were as follows: NuScale expenses $ (246) $ (179) $ (169) Less: DOE reimbursable expenses 64 74 69 NuScale expenses, net (182) (105) (100) Less: Attributable to NCI 76 32 31 NuScale profit (loss) $ (106) $ (73) $ (69) Segment profit in 2023 includes a $60 million negative earnings impact on the sale of our AMECO South America business (including $35 million for foreign currency translation) and a $93 million negative earnings impact on the sale of our Stork business in Latin America (including cash paid to the buyer of $31 million and $33 million for foreign currency translation).
Segment profit in 2022 reflects a $86 million charge for additional rework and schedule delays on a highway project, a $54 million charge for cost growth and delay mitigation costs on an international bridge project and a $35 million charge for subcontractor cost escalation and productivity estimates on an automated people mover project.
Segment profit in 2023 includes the settlement of a claim on an international bridge project compared to the recognition of $54 million in cost growth and delay mitigation costs on the same project in 2022.
Revenue in 2021 decreased due to declines in the volume of execution activities for projects nearing completion and the cancellation of a chemicals project in North America partially offset by the ramp up of execution activities on a refinery project in Mexico and a chemicals project in China.
The revenue increases in 2023 were partially offset by declines in the volume of execution activity for projects nearing completion including a large mining project. Segment profit in 2023 significantly improved.
Investments in unconsolidated partnerships and joint ventures in 2022 included capital contributions to a Mission Solutions joint venture and an infrastructure joint venture.
Investments in unconsolidated partnerships and joint ventures in 2023 included capital contributions to a Mission Solutions joint venture and 3 infrastructure joint ventures. Financing Activities In August 2023, we issued $575 million of 1.125% Convertible Senior Notes (the “2029 Notes”) due August 15, 2029 and received net proceeds of $560 million.