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Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Unrecognized Tax Benefits	$ 15	$ 14	$ 15	$ 14	$ 15	$ 14
Decrease in Unrecognized Tax Benefits is Reasonably Possible	5		5
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	(7)	$ 0	(7)	$ 0
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	17		17
Deferred Tax Assets, Valuation Allowance	$ 3		$ 3

X

- Definition

Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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