Share-based Compensation and Other Employee Benefits - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2019
Number of Shares
Outstanding at beginning of year (in shares)	2
Granted (in shares)	0	0
Exercised (in shares)	(1)
Forfeited (in shares)	0
Outstanding at end of year (in shares)	1
Exercisable at end of year (in shares)	1
Weighted- average Exercise Price Per Share
Outstanding at beginning of year (in usd per share)	$ 15.58
Granted (in usd per share)	0
Exercised (in usd per share)	8.00
Forfeited (in usd per share)	0
Outstanding at end of year (in usd per share)	15.74
Exercisable at end of year (in usd per share)	$ 14.12
Stock Option Activity, Additional Disclosures
Outstanding at end of year, Weighted Average Remaining Contractual Life (in years)	5 years 8 months 12 days
Exercisable at end of year, Weighted Average Remaining Contractual Life (in years)	5 years 6 months
Outstanding at end of year, Aggregate Intrinsic Value	$ 11
Exercisable at end of year, Aggregate Intrinsic Value	$ 11