Stockholders' Equity (Deficit) - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Number of Options
Options outstanding at beginning of period (in shares)	1.8
Granted (in shares)	0.0
Exercised (in shares)	(0.3)
Cancelled (in shares)	0.0
Options outstanding at end of period (in shares)	1.5	1.8
Options exercisable (in shares)	1.5
Options expected to vest (in shares)	0.0
Weighted Average Exercise Price (per share)
Options outstanding at beginning of period (in USD per share)	$ 34.40
Exercised (in USD per share)	31.81
Options outstanding at end of period (in USD per share)	34.98	$ 34.40
Options exercisable at end of period (in usd per share)	34.85
Options expected to vest (in USD per share)	$ 54.56
Exercised, aggregate intrinsic value	$ 14	$ 3	$ 7
Cash received from exercise of stock options	$ 11
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options outstanding, Weighted Average Remaining Contract Term (Years)	3 years 1 month 6 days	3 years 6 months
Options exercisable, Weighted Average Remaining Contractual Term (Years)	3 years
Options expected to vest, Weighted Average Remaining Contract Term (years)	7 years 2 months 12 days
Options outstanding at beginning of period, Aggregate Intrinsic Value	$ 45
Exercised, aggregate intrinsic value	14	$ 3	$ 7
Options outstanding at end of period, Aggregate Intrinsic Value	72	$ 45
Options exercisable, Aggregate Intrinsic Value	72
Options expected to vest, Aggregate Intrinsic Value	$ 0
Stock Options
Weighted Average Exercise Price (per share)
Granted (in USD per share)	$ 0	$ 57.67	$ 74.16
Weighted-average grant date fair value of options (in usd per share)	0	57.67	74.16
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in USD per share)	$ 0	$ 57.67	$ 74.16