Annual report pursuant to Section 13 and 15(d)

Schedule I - Condensed Financial Information of Registrant - Condensed Statements of Operations (Details)

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Schedule I - Condensed Financial Information of Registrant - Condensed Statements of Operations (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Other income (expense)                      
Interest expense, net of capitalized interest                 $ (1,525) $ (1,432) $ (875)
Loss on modification or extinguishment of debt                 (217) (55) (27)
Equity in income of subsidiaries                 (126) (88) 0
Total other expense                 (2,087) (1,646) (797)
Income (Loss) before income taxes                 544 715 1,227
Income tax benefit                 (43) 517 (27)
Net income (loss) attributable to common stockholders $ (194) $ (463) $ 197 $ 375 $ 939 $ (318) $ (114) $ 141 (85) 648 471
Parent Company [Member]                      
Condensed Income Statements, Captions [Line Items]                      
General and Administrative Expense                 20 17 8
Other income (expense)                      
Interest expense, net of capitalized interest                 (155) (141) (128)
Interest Income                 0 1 0
Loss on modification or extinguishment of debt                 (50) 0 0
Equity in income of subsidiaries                 77 490 607
Total other expense                 (128) 350 479
Income (Loss) before income taxes                 (148) 333 471
Income tax benefit                 63 315 0
Net income (loss) attributable to common stockholders                 $ (85) $ 648 $ 471