Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Numerator:
Net income available to common stockholders	$ 701	$ 708	$ 1,841	$ 1,886
Denominator:
Denominator for basic earnings per share—weighted-average common shares (in shares)	64,159	66,019	64,792	66,596
Effect of dilutive securities:
Denominator for diluted earnings per share—adjusted weighted-average common shares (in shares)	64,276	66,185	64,889	66,767
Basic earnings per share (in dollars per share)	$ 10.93	$ 10.73	$ 28.42	$ 28.33
Diluted earnings per share (in dollars per share)	$ 10.91	$ 10.70	$ 28.37	$ 28.25
Employee stock options
Effect of dilutive securities:
Effect of dilutive securities (in shares)	1	2	1	3
Restricted stock units
Effect of dilutive securities:
Effect of dilutive securities (in shares)	116	164	96	168