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Stock-Based Compensation Plans - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	2 Months Ended	10 Months Ended	12 Months Ended
	Dec. 31, 2018	Oct. 29, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted		16,000,000
Number of shares available for grant			7,664,452
Stock-based compensation expense			$ 29	$ 25	$ 20
Spin-Off
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 16
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted			3,057,775	1,607,204
Remaining term of unvested awards			1 year 7 months 6 days
Total unrecognized compensation cost			$ 22
Fair value of RSUs vested			$ 9
Number of outstanding RSUs performance based	3,338,184		5,199,764	3,794,531	3,338,184
Restricted Stock Units (RSUs) | Spin-Off
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Replacement grants issued	1,411,395
Restricted Stock Units (RSUs) | Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Number of restricted stock units granted	1,809,644
Restricted Stock Units (RSUs) | Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted	117,145
Performance-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of outstanding RSUs performance based			867,732
Stock-based compensation expense			$ 2
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Remaining term of unvested awards			1 year 6 months
Expiration period			7 years
Weighted average grant date fair value per share			$ 2.61
Total unrecognized compensation cost related to non-vested stock options granted			$ 1
Number of stock options exercised			0
Minimum | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year
Minimum | Restricted Stock Units (RSUs) | Spin-Off
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining term of unvested awards	1 year
Minimum | Restricted Stock Units (RSUs) | Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Maximum | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			7 years
Maximum | Restricted Stock Units (RSUs) | Spin-Off
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining term of unvested awards	4 years
Maximum | Restricted Stock Units (RSUs) | Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years

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