Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Numerator:
Net income available to common stockholders	$ 708	$ 703	$ 1,886	$ 1,745
Denominator:
Denominator for basic earnings per share—weighted-average common shares (in shares)	66,019	68,153	66,596	68,757
Effect of dilutive securities:
Denominator for diluted earnings per share—adjusted weighted-average common shares (in shares)	66,185	68,263	66,767	68,942
Basic earnings per share (in dollars per share)	$ 10.73	$ 10.30	$ 28.33	$ 25.37
Diluted earnings per share (in dollars per share)	$ 10.70	$ 10.29	$ 28.25	$ 25.30
Employee stock options
Effect of dilutive securities:
Effect of dilutive securities (in shares)	2	4	3	4
Restricted stock units
Effect of dilutive securities:
Effect of dilutive securities (in shares)	164	106	168	181