Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Net income	$ 1,344	$ 1,694
Less:
Net income attributable to noncontrolling interests	14	17
Preferred stock dividends	81	68
Preferred stock discount accretion and redemptions	2	2
Net income attributable to common shareholders	1,247	1,607
Less: Dividends and undistributed earnings allocated to nonvested restricted shares	7	8
Net income attributable to basic common shareholders	$ 1,240	$ 1,599
Basic weighted-average common shares outstanding (in shares)	400	401
Basic earnings per common share (in dollars per share)	$ 3.10	$ 3.98
Net income attributable to diluted common shareholders	$ 1,240	$ 1,599
Dilutive potential common shares (in shares)		1
Diluted weighted-average common shares outstanding (in shares)	400	402
Diluted earnings per common share (in dollars per share)	$ 3.10	$ 3.98