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Operating Information by Segment and Geographic Area - External Revenue and Segment Profit (Loss) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Segment reporting information |  |  |
Revenue | $ 15,474 | $ 13,744 | $ 14,156
Segment profit (loss) | 147 | 209 | (273)
G&A | (232) | (237) | (226)
Impairment | 0 | 24 | (290)
Gain (loss) on pension settlement | 0 | 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)
Total assets | 6,973 | 6,827 |
Goodwill | $ 206 | $ 206 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Earnings (loss) from Cont Ops before taxes | Earnings (loss) from Cont Ops before taxes | Earnings (loss) from Cont Ops before taxes
Continuing Operations |  |  |
Segment reporting information |  |  |
Depreciation (all but Corporate included in segment profit) | $ 74 | $ 73 | $ 73
Capital expenditures | 106 | 75 | 66
Reportable segments |  |  |
Segment reporting information |  |  |
Goodwill | 206 | 206 |
Reportable segments | Continuing Operations |  |  |
Segment reporting information |  |  |
Revenue | 15,474 | 13,744 | 14,156
Segment profit (loss) | 537 | 427 | 415
Intercompany revenue for our professional staffing business, excluded from revenue above | Continuing Operations |  |  |
Segment reporting information |  |  |
Revenue | 299 | 249 | 269
Energy Solutions | Reportable segments |  |  |
Segment reporting information |  |  |
Total assets | 1,053 | 967 |
Goodwill | 13 | 13 |
Energy Solutions | Reportable segments | Continuing Operations |  |  |
Segment reporting information |  |  |
Revenue | 6,307 | 5,872 | 4,956
Segment profit (loss) | 381 | 301 | 250
Depreciation (all but Corporate included in segment profit) | 0 | 0 | 0
Capital expenditures | 0 | 0 | 0
Urban Solutions | Reportable segments |  |  |
Segment reporting information |  |  |
Total assets | 1,211 | 1,170 |
Goodwill | 129 | 129 |
Urban Solutions | Reportable segments | Continuing Operations |  |  |
Segment reporting information |  |  |
Revenue | 5,262 | 4,373 | 4,832
Segment profit (loss) | 268 | 17 | 41
Depreciation (all but Corporate included in segment profit) | 10 | 9 | 9
Capital expenditures | 20 | 14 | 25
Mission Solutions | Reportable segments |  |  |
Segment reporting information |  |  |
Total assets | 577 | 485 |
Goodwill | 58 | 58 |
Mission Solutions | Reportable segments | Continuing Operations |  |  |
Segment reporting information |  |  |
Revenue | 2,655 | 2,289 | 3,063
Segment profit (loss) | 116 | 136 | 155
Depreciation (all but Corporate included in segment profit) | 3 | 3 | 4
Capital expenditures | 4 | 4 | 3
Other | Reportable segments |  |  |
Segment reporting information |  |  |
Total assets | 509 | 583 |
Goodwill | 6 | 6 |
Other | Reportable segments | Continuing Operations |  |  |
Segment reporting information |  |  |
Revenue | 1,250 | 1,210 | 1,305
Segment profit (loss) | (228) | (27) | (31)
Depreciation (all but Corporate included in segment profit) | 19 | 18 | 7
Capital expenditures | 15 | 21 | 19
Corporate | Reportable segments |  |  |
Segment reporting information |  |  |
Total assets | 3,623 | 3,622 |
Corporate | Reportable segments | Continuing Operations |  |  |
Segment reporting information |  |  |
Depreciation (all but Corporate included in segment profit) | 42 | 43 | 53
Capital expenditures | $ 67 | $ 36 | $ 19

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