SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT - STATEMENT OF OPERATIONS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Income Statements, Captions [Line Items]
Interest income	$ 75	$ 69	$ 96
Interest expense	(1,054)	(1,198)	(1,081)
Other income (expense), net	24	58	(48)
Income tax benefit (expense)	(556)	(99)	(249)
Income from continuing operations, net of tax	2,285	1,463	2,255
Net income	$ 2,285	$ 1,463	$ 4,105
Basic earnings per common share (in shares)	$ 6.65	$ 4.03	$ 12.93
Weighted-average number of shares outstanding, basic (in shares)	315,159	311,755	291,077
Diluted earnings per common share (in dollars per share)	$ 6.62	$ 4.01	$ 12.88
Weighted-average number of shares outstanding, diluted (in shares)	316,378	313,036	292,252
Parent Company
Condensed Income Statements, Captions [Line Items]
Interest income	$ 35	$ 11	$ 4
Interest expense	(326)	(576)	(495)
Operating expenses	(92)	(92)	(86)
Other income (expense), net	(58)	20	(38)
Income tax benefit (expense)	111	190	176
Income from continuing operations, net of tax	(330)	(447)	(439)
Equity in earnings of subsidiaries, net of income taxes	2,468	1,764	4,371
Net income	2,138	1,317	3,932
Preferred dividends	(44)	(63)	(168)
Earnings attributable to common shares	$ 2,094	$ 1,254	$ 3,764
Basic earnings per common share (in shares)	$ 6.65	$ 4.03	$ 12.93
Weighted-average number of shares outstanding, basic (in shares)	315,159	311,755	291,077
Diluted earnings per common share (in dollars per share)	$ 6.62	$ 4.01	$ 12.88
Weighted-average number of shares outstanding, diluted (in shares)	316,378	313,036	292,252