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Summary of Significant Accounting Policies (Share-based Compensation Expense) (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Apr. 17, 2020 | Jan. 04, 2012 | Jan. 04, 2012 | Dec. 31, 2021
Sohu Video Sharebased Awards [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date |  | Jan. 04, 2022 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period |  | 10 years |  |
Changyou 2014 Share Incentive Plan [Member] | Stock Options [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share options granted |  |  |  | 4,488,500
Cumulative share based compensation expense |  |  |  | $ 4.1
Changyou 2019 Share Incentive Plan [Member] | Stock Options [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share options granted |  |  |  | 954,500
Sohu Video Share Incentive Plan [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Installments of share options granted |  |  |  | four equal installments
Sohu (excluding Sohu Video) [Member] | Sohu 2018 Share Incentive Plan [Member] | Stock Options [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Installments of share options granted |  |  |  | four equal installments
Award vesting period |  |  |  | 4 years
Changyou [Member] | Class A Ordinary Shares [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options exercises in Period, Fixed Price |  |  |  | $ 5.39
Changyou [Member] | Class A Ordinary Shares [Member] | Changyou Merger [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Consideration Per Share | $ 5.40 |  |  |
Changyou [Member] | Stock Options [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share options granted |  |  |  | 5,443,000
Changyou [Member] | Stock Options [Member] | Class A Ordinary Shares [Member] | Changyou Merger [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Exercise prices of option granted | 0.01 |  |  |
Long term Debt include Accrued over the Service Period Liability | 5.39 |  |  | $ 5.39
Changyou [Member] | Changyou 2014 Share Incentive Plan [Member] | Stock Options [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Installments of share options granted |  |  |  | four equal installments
Award vesting period |  |  |  | 4 years
Changyou [Member] | Changyou 2014 Share Incentive Plan [Member] | Stock Options [Member] | Class A Ordinary Shares [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Installments of share options granted |  |  |  | four equal installments
Changyou [Member] | Changyou 2014 Share Incentive Plan [Member] | Stock Options [Member] | Class A Ordinary Shares [Member] | Changyou Merger [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Accrued fixed price, initial | 5.39 |  |  |
Accrued fixed price, final | 5.39 |  |  |
Consideration Per Share | 5.40 |  |  |
Exercise prices of option granted | 0.01 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Per Share Fixed Price | 5.39 |  |  |
Changyou [Member] | Changyou 2019 Share Incentive Plan [Member] | Stock Options [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Installments of share options granted |  |  |  | four equal installments
Award vesting period |  |  |  | 4 years
Changyou [Member] | Changyou 2019 Share Incentive Plan [Member] | Stock Options [Member] | Class A Ordinary Shares [Member] | Changyou Merger [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Accrued fixed price, initial | 5.39 |  |  |
Accrued fixed price, final | 5.39 |  |  |
Changyou [Member] | Changyou 2014 and 2019 Share Incentive Plan [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Cumulative share based compensation expense |  |  |  | $ 23.5
Changyou [Member] | Changyou 2014 and 2019 Share Incentive Plan [Member] | Stock Options [Member] | Class A Ordinary Shares [Member] | Changyou Merger [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Accrued fixed price, initial | 5.39 |  |  |
Accrued fixed price, final | 5.39 |  |  |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Not Exercisable in Period, Conditionally Repurchased, Exercise Price | 5.39 |  |  |
Sohu Video [Member] | Video 2011 Share Incentive Plan [Member] | Stock Options [Member] | Ordinary Shares [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Installments of share options granted |  |  |  | four equal installments
Number of shares authorized for issuance |  | 25,000,000 | 25,000,000 |
Percentage of outstanding ordinary shares on a fully-diluted basis |  |  | 10.00% |
Number of shares under contractually granted share options |  |  |  | 16,368,200
Number of shares purchased on vested options |  |  |  | 4,972,800
Sohu Video [Member] | Sohu Video Share Incentive Plan [Member] | Stock Options [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date |  |  |  | Jan. 04, 2022
Sohu Video [Member] | Sohu Video Share Incentive Plan [Member] | Stock Options [Member] | Ordinary Shares [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Installments of share options granted |  |  |  | four equal installments
Number of shares under contractually granted share options |  |  |  | 16,368,200
Number of shares purchased on vested options |  |  |  | 4,972,800
Changyou Com Limited [Member] | Stock Options [Member] | Class A Ordinary Shares [Member] | Changyou Merger [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Accrued fixed price, final | $ 5.39 |  |  |

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