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, 2024	Dec. 31, 2023	Dec. 31, 2022
Condensed Income Statements, Captions [Line Items]
Interest income	$ 61	$ 89	$ 75
Interest expense	(1,049)	(1,309)	(1,054)
Other income (expense), net	136	131	24
Income tax expense	(219)	(490)	(556)
Net income	3,500	3,618	2,285
Earnings attributable to common shares	$ 2,817	$ 3,030	$ 2,094
Basic earnings per common share (usd per share)	$ 4.44	$ 4.81	$ 3.32
Weighted-average number of shares outstanding (in shares)	633,795	630,296	630,318
Diluted earnings per common share (usd per share)	$ 4.42	$ 4.79	$ 3.31
Weighted-average number of shares outstanding, diluted (in shares)	637,943	632,733	632,757
Parent Company
Condensed Income Statements, Captions [Line Items]
Interest income	$ 29	$ 31	$ 35
Interest expense	(490)	(444)	(326)
Operating expenses	(105)	(101)	(92)
Other income (expense), net	25	31	(58)
Income tax expense	165	134	111
Income (loss) from continuing operations, net of tax	(376)	(349)	(330)
Equity in earnings of subsidiaries, net of income taxes	3,237	3,423	2,468
Net income	2,861	3,074	2,138
Preferred dividends	(44)	(44)	(44)
Earnings attributable to common shares	$ 2,817	$ 3,030	$ 2,094
Basic earnings per common share (usd per share)	$ 4.44	$ 4.81	$ 3.32
Weighted-average number of shares outstanding (in shares)	633,795	630,296	630,318
Diluted earnings per common share (usd per share)	$ 4.42	$ 4.79	$ 3.31
Weighted-average number of shares outstanding, diluted (in shares)	637,943	632,733	632,757