Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net income	$ 1,505	$ 1,570	$ 4,326	$ 4,764
Less:
Net income attributable to noncontrolling interests	15	16	47	50
Preferred stock dividends	82	104	258	299
Preferred stock discount accretion and redemptions	2	2	6	6
Net income attributable to common shareholders	1,406	1,448	4,015	4,409
Less: Dividends and undistributed earnings allocated to nonvested restricted shares	10	8	24	23
Net income attributable to basic common shareholders	$ 1,396	$ 1,440	$ 3,991	$ 4,386
Basic weighted-average common shares outstanding (in shares)	399	400	400	401
Basic earnings per share common share (in dollars per share)	$ 3.50	$ 3.60	$ 9.99	$ 10.95
Net income attributable to diluted common shareholders	$ 1,396	$ 1,440	$ 3,991	$ 4,386
Dilutive potential common shares (in shares)	1
Diluted weighted-average common shares outstanding (in shares)	400	400	400	401
Diluted earnings per common share (in dollars per share)	$ 3.49	$ 3.60	$ 9.98	$ 10.94