Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share [Abstract]
Net income	$ 5,647	$ 6,113	$ 5,725
Less:
Less: Net income attributable to noncontrolling interests	69	72	51
Preferred stock dividends	417	301	233
Preferred stock discount accretion and redemptions	8	5	5
Net income attributable to common shareholders	5,153	5,735	5,436
Less: Dividends and undistributed earnings allocated to nonvested restricted shares	27	27	27
Net income attributable to basic common shareholders	$ 5,126	$ 5,708	$ 5,409
Basic weighted-average common shares outstanding (in shares)	401	412	426
Basic earnings per common share (in dollars per share)	$ 12.80	$ 13.86	$ 12.71
Net income attributable to diluted common shareholders	$ 5,126	$ 5,708	$ 5,409
Diluted weighted-average common shares outstanding (in shares)	401	412	426
Diluted (in dollars per share)	$ 12.79	$ 13.85	$ 12.70