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Segment Reporting (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Sep. 30, 2022
Jun. 30, 2022
Dec. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Statement            
Revenues       $ 31,543 $ 26,989 $ 9,093
Operating expenses       28,737 22,566 7,481
Depreciation and amortization       634 785 435
Impairment losses       206 544 75
Total operating cost and expenses       29,577 23,895 7,991
Gain on sale of assets       52 247 3
Operating income       2,018 3,341 1,105
Equity in (losses)/earnings of unconsolidated affiliates       6 17 17
Impairment losses on investments       0 0 (18)
Other income, net       56 63 67
Loss on debt extinguishment       0 (77) (9)
Interest expense       (417) (485) (401)
Income Before Income Taxes       1,663 2,859 761
Income tax expense (benefit)       442 672 251
Net income (loss)       1,221 2,187 510
Balance sheet            
Equity investments in affiliates     $ 157 133 157  
Capital expenditures     269 367 269  
Goodwill     1,795 1,650 1,795 579
Total assets     23,182 29,146 23,182  
Corporate            
Income Statement            
Revenues       0 0 0
Operating expenses       86 141 57
Depreciation and amortization       31 28 34
Impairment losses       0 0 0
Total operating cost and expenses       117 169 91
Gain on sale of assets       (3) 211 5
Operating income       (120) 42 (86)
Equity in (losses)/earnings of unconsolidated affiliates       0 0 0
Impairment losses on investments           0
Other income, net       54 59 41
Loss on debt extinguishment         (77) 0
Interest expense       (400) (469) (384)
Income Before Income Taxes       (466) (445) (429)
Income tax expense (benefit)       384 653 250
Net income (loss)       (850) (1,098) (679)
Balance sheet            
Equity investments in affiliates     0 0 0  
Capital expenditures     45 50 45  
Goodwill     0 0 0  
Total assets     19,051 35,780 19,051  
Eliminations            
Income Statement            
Revenues       17 10 (4)
Operating expenses       17 10 (4)
Depreciation and amortization       0 0 0
Impairment losses       0 0 0
Total operating cost and expenses       17 10 (4)
Gain on sale of assets       0 0 0
Operating income       0 0 0
Equity in (losses)/earnings of unconsolidated affiliates       0 0 0
Impairment losses on investments           0
Other income, net       (16) (14) 0
Loss on debt extinguishment         0 0
Interest expense       16 14 0
Income Before Income Taxes       0 0 0
Income tax expense (benefit)       0 0 0
Net income (loss)       0 0 0
Balance sheet            
Equity investments in affiliates     0 0 0  
Capital expenditures     0 0 0  
Goodwill     0 0 0  
Total assets     (26,458) (45,774) (26,458)  
Texas            
Balance sheet            
Goodwill     716 710 716 289
Texas | Operating Segments            
Income Statement            
Revenues       10,057 10,295 6,312
Operating expenses       8,495 8,692 5,251
Depreciation and amortization       310 336 233
Impairment losses       0 0 14
Total operating cost and expenses       8,805 9,028 5,498
Gain on sale of assets       10 19 0
Operating income       1,262 1,286 814
Equity in (losses)/earnings of unconsolidated affiliates       (2) (3) (12)
Impairment losses on investments           (18)
Other income, net       5 8 11
Loss on debt extinguishment         0 0
Interest expense       0 (1) 0
Income Before Income Taxes       1,265 1,290 795
Income tax expense (benefit)       0 0 0
Net income (loss)       1,265 1,290 795
Balance sheet            
Equity investments in affiliates     0 0 0  
Capital expenditures     153 273 153  
Goodwill     716 710 716  
Total assets     12,271 11,475 12,271  
Texas | Eliminations            
Income Statement            
Revenues       (4) (5) (6)
East            
Income Statement            
Impairment losses $ 43 $ 20 16 13    
Balance sheet            
Goodwill     853 723 853 240
East | Operating Segments            
Income Statement            
Revenues       16,763 13,025 2,249
Operating expenses       16,031 10,256 1,755
Depreciation and amortization       208 333 132
Impairment losses       206 535 0
Total operating cost and expenses       16,445 11,124 1,887
Gain on sale of assets       0 0 0
Operating income       318 1,901 362
Equity in (losses)/earnings of unconsolidated affiliates       0 0 0
Impairment losses on investments           0
Other income, net       10 7 7
Loss on debt extinguishment         0 (4)
Interest expense       (1) (1) (14)
Income Before Income Taxes       327 1,907 351
Income tax expense (benefit)       1 0 (1)
Net income (loss)       326 1,907 352
Balance sheet            
Equity investments in affiliates     0 0 0  
Capital expenditures     50 7 50  
Goodwill     853 723 853  
Total assets     13,645 19,526 13,645  
East | Eliminations            
Income Statement            
Revenues       26 18 6
West/Services/Other            
Balance sheet            
Goodwill     226 217 226 50
West/Services/Other | Operating Segments            
Income Statement            
Revenues       4,706 3,659 536
Operating expenses       4,108 3,467 422
Depreciation and amortization       85 88 36
Impairment losses       0 9 61
Total operating cost and expenses       4,193 3,564 519
Gain on sale of assets       45 17 (2)
Operating income       558 112 15
Equity in (losses)/earnings of unconsolidated affiliates       8 20 29
Impairment losses on investments           0
Other income, net       3 3 8
Loss on debt extinguishment         0 (5)
Interest expense       (32) (28) (3)
Income Before Income Taxes       537 107 44
Income tax expense (benefit)       57 19 2
Net income (loss)       480 88 42
Balance sheet            
Equity investments in affiliates     157 133 157  
Capital expenditures     21 37 21  
Goodwill     226 217 226  
Total assets     $ 4,673 8,139 4,673  
West/Services/Other | Eliminations            
Income Statement            
Revenues       $ (5) $ (3) $ (4)