Stock Based Awards and Other Equity Instruments - Summary of MSU Activity (Details) - MSUs $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
MSUs outstanding
Unvested outstanding, Beginning balance | shares	174
Unvested MSUs, Cancelled | shares	(54)	[1]
Unvested outstanding, Ending balance | shares	120	[2]
Weighted Average Grant-Date Fair Value Per Share
Unvested outstanding, Weighted Average Grant-Date Fair Value Per Share, Beginning balance | $ / shares	$ 37.29
Weighted Average Grant-Date Fair Value Per Share, Cancelled | $ / shares	57.62	[1]
Unvested outstanding, Weighted Average Grant-Date Fair Value Per Share, Ending balance | $ / shares	$ 28.15	[2]
Aggregate Intrinsic Value
Unvested MSUs outstanding, Aggregate Intrinsic Value | $	$ 3	[2]

[1] MSU cancellations primarily reflect performance targets not being attained during the performance period.

[2] MSUs provide for vesting based upon the Company’s total shareholder return, or TSR, performance over the period commencing January 1, 2020 through December 31, 2022 relative to the TSR performance of The Nasdaq Composite Total Return Index. Based upon actual attainment relative to the target performance metric, the grantee has the ability to receive up to 200% of the target number of MSUs originally granted, or to receive none at all.