Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net income available to common stockholders	$ 639	$ 606	$ 493	$ 367	$ 481	$ 409	$ 293	$ 203	$ 2,105	$ 1,386	$ 890
Denominator:
Denominator for basic earnings per share—weighted-average common shares (in shares)									70,703	72,432	72,658
Effect of dilutive securities:
Denominator for diluted earnings per share—adjusted weighted-average common shares (in shares)									70,973	72,817	72,929
Basic earnings per share (in dollars per share)	$ 9.20	$ 8.69	$ 6.91	$ 5.07	$ 6.65	$ 5.65	$ 4.03	$ 2.81	$ 29.77	$ 19.14	$ 12.24
Diluted earnings per share (in dollars per share)	$ 9.15	$ 8.66	$ 6.90	$ 5.05	$ 6.61	$ 5.63	$ 4.02	$ 2.80	$ 29.65	$ 19.04	$ 12.20
Employee stock options
Effect of dilutive securities:
Share-based payment arrangements (in shares)									4	4	12
Restricted stock units
Effect of dilutive securities:
Share-based payment arrangements (in shares)									266	381	259