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Stock-Based Compensation and Stockholder's Equity - Schedule of Share-based Compensation, Stock Options Activity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Options
Outstanding at the beginning of the period (in shares)	176,724
Exercised (in shares)	(114,884)	(70,608)	0
Forfeited (in shares)	(1,233)
Expired (in shares)	(16,702)
Outstanding at the end of the period (in shares)	43,905	176,724
Vested and expected to vest (in shares)	43,905
Exercisable (in shares)	42,610
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 22.57
Exercised (in dollars per share)	22.64
Forfeited (in dollars per share)	26.65
Expired (in dollars per share)	26.67
Outstanding at the end of the period (in dollars per share)	20.69	$ 22.57
Vested and expected to vest (in dollars per share)	20.69
Exercisable (in dollars per share)	$ 20.84
Weighted Average Remaining Contractual Term (years)
Outstanding (in years)	1 year 18 days	1 year 8 months 15 days
Vested and expected to vest (in years)	1 year 18 days
Exercisable (in years)	1 year 18 days
Aggregate Intrinsic Value (in millions)
Outstanding	$ 3	$ 9
Vested and expected to vest	3
Exercisable	$ 3

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Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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