Stock-Based Compensation - Stock Options (Details) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Shares
Granted (in shares)	338,000
Stock options
Shares
Outstanding at the beginning of the period (in shares)	2,692,000	2,488,000
Granted (in shares)	338,000	332,000
Exercised (in shares)	32,000	18,000
Forfeited (in shares)	10,000	0
Outstanding at the end of the period (in shares)	2,988,000	2,802,000
Vested and expected to vest at the end of the period (in shares)	2,928,000	2,687,000
Exercisable at the end of the period (in shares)	2,051,000	1,717,000
Weighted average exercise price
Outstanding at the beginning of the period (in dollars per share)	$ 37	$ 33
Granted (in dollars per share)	59	56
Exercised (in dollars per share)	34	20
Forfeited (in dollars per share)	37	11
Outstanding at the end of the period (in dollars per share)	39	36
Vested and expected to vest at the end of the period (in dollars per share)	39	36
Exercisable at the end of the period (in dollars per share)	$ 34	$ 30
Aggregate intrinsic value
Exercised	$ 1	$ 1
Vested and expected to vest at the end of the period	30	53
Exercisable at the end of the period	$ 28	$ 43
Weighted average remaining option term
Outstanding at the end of the period	6 years	6 years
Vested and expected to vest at the end of the period	6 years	6 years
Exercisable at the end of the period	5 years	5 years