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Operating Information by Segment and Geographic Area - External Revenue and Segment Profit (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Segment reporting information |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 3,157,000 | $ 3,103,000 | $ 3,236,000 | $ 2,939,000 | $ 3,268,000 | $ 3,457,000 | $ 3,735,000 | $ 3,698,000 | $ 12,434,879 | $ 14,157,929 | $ 15,454,484
Segment profit (loss) |  |  |  |  |  |  |  |  | (59,730) | 45,288 | (828,335)
G&A |  |  |  |  |  |  |  |  | (216,451) | (201,522) | (139,819)
Impairment, restructuring & other exit costs |  |  |  |  |  |  |  |  | (43,792) | (108,357) | (318,442)
Gain (loss) on pension settlement |  |  |  |  |  |  |  |  | (198,000) | 0 | (138,000)
Foreign currency gain (loss) |  |  |  |  |  |  |  |  | (12,950) | (44,765) | (26,124)
Interest income (expense), net |  |  |  |  |  |  |  |  | (68,000) | (42,000) | (11,000)
Earnings (loss) from Cont Ops attributable to NCI |  |  |  |  |  |  |  |  | 37,000 | 67,000 | (39,000)
Earnings (loss) from Cont Ops before taxes | (157,000) | $ 70,000 | $ (13,000) | $ (28,000) | (42,000) | $ 54,000 | $ 23,000 | $ (32,000) | (127,705) | 3,494 | (839,465)
Depreciation (all but Corporate included in segment profit) |  |  |  |  |  |  |  |  | 73,200 | 102,451 | 154,599
Capital expenditures |  |  |  |  |  |  |  |  | 75,073 | 113,442 | 180,842
Total assets | 7,279,563 |  |  |  | 7,309,812 |  |  |  | 7,279,563 | 7,309,812 |
Goodwill | 206,508 |  |  |  | 207,369 |  |  |  | 206,508 | 207,369 |
Cont Ops |  |  |  |  |  |  |  |  |  |  |
Segment reporting information |  |  |  |  |  |  |  |  |  |  |
Depreciation (all but Corporate included in segment profit) |  |  |  |  |  |  |  |  | 68,000 | 81,000 | 75,000
Capital expenditures |  |  |  |  |  |  |  |  | 50,000 | 61,000 | 74,000
Disc Ops - Assets held for sale | 29,028 |  |  |  | 29,602 |  |  |  | 29,028 | 29,602 |
Disc Ops |  |  |  |  |  |  |  |  |  |  |
Segment reporting information |  |  |  |  |  |  |  |  |  |  |
Depreciation (all but Corporate included in segment profit) |  |  |  |  |  |  |  |  | 5,417 | 21,849 | 78,771
Disc Ops - Assets held for sale | 825,827 |  |  |  | 988,126 |  |  |  | 825,827 | 988,126 |
Reportable segments |  |  |  |  |  |  |  |  |  |  |
Segment reporting information |  |  |  |  |  |  |  |  |  |  |
Goodwill | 207,000 |  |  |  | 207,000 |  |  |  | 207,000 | 207,000 |
Reportable segments | Cont Ops |  |  |  |  |  |  |  |  |  |  |
Segment reporting information |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 12,435,000 | 14,158,000 | 15,454,000
Segment profit (loss) |  |  |  |  |  |  |  |  | 374,000 | 333,000 | (167,000)
Intercompany revenue for our professional staffing business, excluded from revenue above | Cont Ops |  |  |  |  |  |  |  |  |  |  |
Segment reporting information |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 261,000 | 269,000 | 310,000
Energy Solutions | Reportable segments |  |  |  |  |  |  |  |  |  |  |
Segment reporting information |  |  |  |  |  |  |  |  |  |  |
Total assets | 1,158,000 |  |  |  | 1,011,000 |  |  |  | 1,158,000 | 1,011,000 |
Goodwill | 13,000 |  |  |  | 13,000 |  |  |  | 13,000 | 13,000 |
Energy Solutions | Reportable segments | Cont Ops |  |  |  |  |  |  |  |  |  |  |
Segment reporting information |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 4,956,000 | 5,271,000 | 5,838,000
Segment profit (loss) |  |  |  |  |  |  |  |  | 250,000 | 169,000 | (97,000)
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 | 906,000 |  |  |  | 1,123,000 |  |  |  | 906,000 | 1,123,000 |
Goodwill | 130,000 |  |  |  | 130,000 |  |  |  | 130,000 | 130,000 |
Urban Solutions | Reportable segments | Cont Ops |  |  |  |  |  |  |  |  |  |  |
Segment reporting information |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 4,416,000 | 5,854,000 | 6,590,000
Segment profit (loss) |  |  |  |  |  |  |  |  | 38,000 | 161,000 | (50,000)
Depreciation (all but Corporate included in segment profit) |  |  |  |  |  |  |  |  | 9,000 | 10,000 | 7,000
Capital expenditures |  |  |  |  |  |  |  |  | 25,000 | 29,000 | 12,000
Mission Solutions | Reportable segments |  |  |  |  |  |  |  |  |  |  |
Segment reporting information |  |  |  |  |  |  |  |  |  |  |
Total assets | 764,000 |  |  |  | 576,000 |  |  |  | 764,000 | 576,000 |
Goodwill | 58,000 |  |  |  | 58,000 |  |  |  | 58,000 | 58,000 |
Mission Solutions | Reportable segments | Cont Ops |  |  |  |  |  |  |  |  |  |  |
Segment reporting information |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 3,063,000 | 3,033,000 | 3,026,000
Segment profit (loss) |  |  |  |  |  |  |  |  | 155,000 | 87,000 | 46,000
Depreciation (all but Corporate included in segment profit) |  |  |  |  |  |  |  |  | 4,000 | 4,000 | 4,000
Capital expenditures |  |  |  |  |  |  |  |  | 4,000 | 3,000 | 3,000
Other | Reportable segments |  |  |  |  |  |  |  |  |  |  |
Segment reporting information |  |  |  |  |  |  |  |  |  |  |
Total assets | 38,000 |  |  |  | 37,000 |  |  |  | 38,000 | 37,000 |
Goodwill | 6,000 |  |  |  | 6,000 |  |  |  | 6,000 | 6,000 |
Other | Reportable segments | Cont Ops |  |  |  |  |  |  |  |  |  |  |
Segment reporting information |  |  |  |  |  |  |  |  |  |  |
Segment profit (loss) |  |  |  |  |  |  |  |  | (69,000) | (84,000) | (66,000)
Depreciation (all but Corporate included in segment profit) |  |  |  |  |  |  |  |  | 2,000 | 2,000 | 2,000
Capital expenditures |  |  |  |  |  |  |  |  | 2,000 | 4,000 | 1,000
Corporate | Reportable segments |  |  |  |  |  |  |  |  |  |  |
Segment reporting information |  |  |  |  |  |  |  |  |  |  |
Total assets | $ 3,588,000 |  |  |  | $ 3,575,000 |  |  |  | 3,588,000 | 3,575,000 |
Corporate | Reportable segments | Cont Ops |  |  |  |  |  |  |  |  |  |  |
Segment reporting information |  |  |  |  |  |  |  |  |  |  |
Depreciation (all but Corporate included in segment profit) |  |  |  |  |  |  |  |  | 53,000 | 65,000 | 62,000
Capital expenditures |  |  |  |  |  |  |  |  | 19,000 | 25,000 | 58,000
Diversified Services Segment | Reportable segments | Cont Ops |  |  |  |  |  |  |  |  |  |  |
Segment reporting information |  |  |  |  |  |  |  |  |  |  |
Depreciation (all but Corporate included in segment profit) |  |  |  |  |  |  |  |  | 5,000 | 22,000 | 79,000
Capital expenditures |  |  |  |  |  |  |  |  | $ 28,000 | $ 48,000 | $ 102,000

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