Equity Incentive Plans - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Equity Incentive Plans
Common stock authorized for stock-based awards (in shares)	110.8
Common stock reserved for further issuance (in shares)	14.2
Stock options
Equity Incentive Plans
Vesting period of options granted	3 years
Expiration term for options	10 years
Weighted average grant date fair value of options granted (in dollars per share)	$ 21.16	$ 15.61	$ 18.17
Intrinsic value of options exercised	$ 107	$ 112	$ 119
Risk-free rate, high end of the range (as a percent)	4.80%	1.70%	1.80%
Weighted average volatility (as a percent)	23.20%	23.00%	17.60%
Weighted average expected term	5 years 10 months 24 days	7 years 6 months	6 years 1 month 6 days
Restricted stock units
Equity Incentive Plans
Weighted average grant date fair value, granted (in dollars per share)	$ 123.98	$ 108.99	$ 118.61
Total fair value of restricted stock and restricted stock units vested	$ 59	$ 35	$ 32
Performance stock awards
Equity Incentive Plans
Weighted average grant date fair value, granted (in dollars per share)	$ 123.08	$ 107.14	$ 123.48
Total fair value of restricted stock and restricted stock units vested	$ 87	$ 70	$ 101
Risk-free rate, high end of the range (as a percent)	1.70%
Expected volatility rate (as a percent)	30.40%
Weighted average volatility (as a percent)	34.20%
Weighted average expected term	2 years 10 months 24 days