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Segment Reporting (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Segment Reporting Information    
Revenue $ 7,896 $ 8,091
Depreciation and amortization 183 317
Gain (loss) on sale of assets (3) 17
Equity in (losses) of unconsolidated affiliates (15) (6)
Income/(loss) before income taxes 2,307 (167)
Net income/(loss) 1,736 (82)
Corporate    
Segment Reporting Information    
Revenue 0 0
Depreciation and amortization 8 7
Gain (loss) on sale of assets (2) 0
Equity in (losses) of unconsolidated affiliates 0 0
Income/(loss) before income taxes (131) (169)
Net income/(loss) (703) (79)
Eliminations    
Segment Reporting Information    
Revenue 17 (1)
Depreciation and amortization 0 0
Gain (loss) on sale of assets 0 0
Equity in (losses) of unconsolidated affiliates 0 0
Income/(loss) before income taxes 0 0
Net income/(loss) 0 0
Texas | Operating Segments    
Segment Reporting Information    
Revenue 2,023 3,702
Depreciation and amortization 76 77
Gain (loss) on sale of assets 0 0
Equity in (losses) of unconsolidated affiliates (1) (1)
Income/(loss) before income taxes 773 (433)
Net income/(loss) 773 (433)
East | Operating Segments    
Segment Reporting Information    
Revenue 4,718 3,495
Depreciation and amortization 78 206
Gain (loss) on sale of assets 0 0
Equity in (losses) of unconsolidated affiliates 0 0
Income/(loss) before income taxes 1,541 356
Net income/(loss) 1,541 356
West/Services/Other | Operating Segments    
Segment Reporting Information    
Revenue 1,138 895
Depreciation and amortization 21 27
Gain (loss) on sale of assets (1) 17
Equity in (losses) of unconsolidated affiliates (14) (5)
Income/(loss) before income taxes 124 79
Net income/(loss) $ 125 $ 74