Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Net income available to common stockholders	$ 606	$ 409	$ 1,466	$ 905
Denominator:
Denominator for basic earnings per share—weighted-average common shares (in shares)	69,854	72,463	71,140	72,419
Effect of dilutive securities:
Denominator for diluted earnings per share—adjusted weighted-average common shares (in shares)	70,053	72,710	71,337	72,678
Basic earnings per share (in dollars per share)	$ 8.69	$ 5.65	$ 20.61	$ 12.49
Diluted earnings per share (in dollars per share)	$ 8.66	$ 5.63	$ 20.56	$ 12.45
Employee stock options
Effect of dilutive securities:
Effect of dilutive securities (in shares)	4	4	4	4
Restricted stock units
Effect of dilutive securities:
Effect of dilutive securities (in shares)	195	243	193	255