The amount of consideration received per share.

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Fixed exercise price of shares

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Ownership percentage held by parent company.

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A holding company in Hong Kong will be subject to this withholding tax rate under the Arrangement Between the PRC and the Hong Kong Special Administrative Region on the Avoidance of Double Taxation and Prevention of Fiscal Evasion with Respect to Taxes on Income and Capital (the "China-HK Tax Arrangement") if such holding company is considered a non-PRC resident enterprise and holds at least 25% of the equity interests in the PRC foreign invested enterprise distributing the dividends, subject to approval of the PRC local tax authority.

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Provision for income tax expense related to toll charge.

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Restricted investment maturity period.

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The final amount of share-based compensation arrangement by share-based payment award options accrued fixed price.

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No definition available.

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The initial amount of share-based compensation arrangement by share-based payment award options accrued fixed price.

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Per share fixed price paid for shares under share-based payment arrangement.

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Price at which option holders acquired shares which is not exercisable in period but can conditionally be repurchased when converting their stock options into shares.

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Taxation [Line Items]

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Value-added tax rate.

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Withholding tax rate on dividends, foreign invested enterprises to foreign holding companies

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

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Change during the period in carrying value for all deferred liabilities due within one year or operating cycle.

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Amount of interest expense accrued for an underpayment of income taxes.

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Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns.

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Summary Of Significant Accounting Policies (Taxation&Net Income/(Loss) per Share&Short-term Investments) (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended	12 Months Ended
	Apr. 17, 2020	Dec. 31, 2017	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Taxation&Net Income/(Loss) per Share&Short-term Investments[Line Items]
Withholding tax rate on dividends, foreign invested enterprises to foreign holding companies			10.00%
Statutory income tax rate			25.00%	25.00%	25.00%
Class A ordinary shares [Member] \| Changyou [Member] \| Changyou Merger [Member]
Taxation&Net Income/(Loss) per Share&Short-term Investments[Line Items]
Consideration Per Share	$ 5.40
Class A ordinary shares [Member] \| Share Options [Member] \| Changyou [Member] \| Changyou Merger [Member]
Taxation&Net Income/(Loss) per Share&Short-term Investments[Line Items]
Exercise Price of Shares	0.01
Changyou 2014 and 2019 Share Incentive Plan [Member] \| Class A ordinary shares [Member] \| Share Options [Member] \| Changyou [Member] \| Changyou Merger [Member]
Taxation&Net Income/(Loss) per Share&Short-term Investments[Line Items]
Share-based compensation by share based payment arrangement per share weighted average price per share	5.39
Accrued fixed price, initial	5.39
Accrued fixed price, final	5.39
Changyou 2014 Share Incentive Plan [Member] \| Class A ordinary shares [Member] \| Share Options [Member] \| Changyou [Member] \| Changyou Merger [Member]
Taxation&Net Income/(Loss) per Share&Short-term Investments[Line Items]
Weighted Average Exercise Price, Exercised	5.39
Consideration Per Share	5.40
Exercise Price of Shares	0.01
Share-based compensation by share based payment arrangement per share weighted average price per share	5.39
Accrued fixed price, initial	5.39
Accrued fixed price, final	$ 5.39
Sohu [Member] \| Ordinary Shares [Member] \| Changyou [Member] \| Changyou Merger [Member]
Taxation&Net Income/(Loss) per Share&Short-term Investments[Line Items]
Effective Interest held	100.00%
Minimum [Member] \| Time Deposit [Member]
Taxation&Net Income/(Loss) per Share&Short-term Investments[Line Items]
Restricted Investment Maturity Period			3 months
Minimum [Member] \| Long Term Time Deposit [Member]
Taxation&Net Income/(Loss) per Share&Short-term Investments[Line Items]
Restricted Investment Maturity Period			1 year
Maximum [Member] \| Time Deposit [Member]
Taxation&Net Income/(Loss) per Share&Short-term Investments[Line Items]
Restricted Investment Maturity Period			1 year
Thereafter tax years after December 31,2017 [Member]
Taxation&Net Income/(Loss) per Share&Short-term Investments[Line Items]
Statutory income tax rate						21.00%
Prior tax years before December 31,2017 [Member]
Taxation&Net Income/(Loss) per Share&Short-term Investments[Line Items]
Statutory income tax rate							35.00%
HONG KONG
Taxation&Net Income/(Loss) per Share&Short-term Investments[Line Items]
Preferential withholding tax rate on dividends, foreign invested enterprises			5.00%
UNITED STATES
Taxation&Net Income/(Loss) per Share&Short-term Investments[Line Items]
Provisional amount of income tax expense recognized for the Toll Charge		$ 219
Reduction in liability for deferred income tax		$ 4
Unrecognized tax benefit recorded						$ 142
Interest in connection with unrecognized tax benefit			$ 5	$ 6
Decrease in Unrecognized Tax Benefits is Reasonably Possible						$ 77
UNITED STATES \| Thereafter tax years after December 31,2017 [Member]
Taxation&Net Income/(Loss) per Share&Short-term Investments[Line Items]
Statutory income tax rate						21.00%
UNITED STATES \| Prior tax years before December 31,2017 [Member]
Taxation&Net Income/(Loss) per Share&Short-term Investments[Line Items]
Statutory income tax rate							35.00%
CHINA
Taxation&Net Income/(Loss) per Share&Short-term Investments[Line Items]
Withholding tax rate on dividends, foreign invested enterprises to foreign holding companies			10.00%
State Administration of Taxation, China [Member]
Taxation&Net Income/(Loss) per Share&Short-term Investments[Line Items]
Value-added tax rate			6.00%
Statutory income tax rate			25.00%