Stockholders' Equity and EPS - Reconciliation of Basic EPS to Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net income available to common stockholders	$ 1,770	$ 1,191	$ 1,137
Denominator:
Weighted average common shares outstanding-basic (in shares)	55,763	51,685	51,915
Denominator for diluted calculation (in shares)	56,638	52,084	52,311
Earnings per common share:
Basic (usd per share)	$ 31.74	$ 23.05	$ 21.90
Diluted (usd per share)	$ 31.25	$ 22.87	$ 21.73
Stock options and ESPP
Denominator:
Weighted average effect of dilutive securities (in shares)	283	151	227
Restricted stock units
Denominator:
Weighted average effect of dilutive securities (in shares)	592	248	169