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Sohu.com Limited Shareholders' Equity (Changyou 2014 Share Incentive Plan, Narrative) (Details) - USD ($)
12 Months Ended
Apr. 17, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Aug. 26, 2019
Jul. 28, 2016
Jun. 01, 2015
Feb. 16, 2015
Nov. 02, 2014
Jun. 27, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based compensation expense   $ 8,578,000 $ 14,480,000 $ 2,350,000            
Changyou 2014 Share Incentive Plan [Member] | Share Options [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of Shares, Granted   4,488,500                
Total fair value of stock options granted   $ 4,100,000                
Total fair values of share options vested   4,100,000 4,200,000 1,000,000.0            
Total intrinsic value of share options exercised   $ 0 100,000 6,600,000            
Changyou [Member] | Share Options [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of Shares, Granted   5,443,000                
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] | Class A Ordinary Shares [Member] | Share Options [Member] | Changyou Merger [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Exercise prices of option granted 0.01                  
Changyou [Member] | Changyou 2014 Share Incentive Plan [Member] | Share 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] | Class A Ordinary Shares [Member] | Share Options [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] | Class A Ordinary Shares [Member] | Share Options [Member] | Changyou Merger [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Exercise prices of option granted 0.01                  
Accrued fixed price, final 5.39                  
Share Based Compensation Arrangement By Share Based Payment Award Per Share Fixed Price 5.39                  
Share Based Compensation Arrangement By Share Based Payment Award Options Accrued Fixed Price Initial 5.39                  
Consideration Per Share 5.40                  
Changyou [Member] | Changyou 2014 Share Incentive Plan [Member] | Certain members of management and certain other employees [Member] | Share Options [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based compensation expense   $ 3,900,000 $ 7,700,000 $ (1,900,000)            
Changyou [Member] | Changyou 2014 Share Incentive Plan [Member] | Certain members of management and certain other employees [Member] | Class A Ordinary Shares [Member] | Share Options [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Shares reserved for future issuance                 6,000,000 2,000,000
Plan expiration date   Jun. 30, 2024                
Number of shares under contractually granted share options         3,023,000 100,000 1,998,000      
Exercise prices of option granted 0.01       $ 0.01 $ 0.01 $ 0.01 $ 0.01    
Installments of share options granted   four equal installments                
Award vesting period   4 years                
Changyou [Member] | Changyou 2014 Share Incentive Plan [Member] | Certain members of management and certain other employees [Member] | Class A Ordinary Shares [Member] | Maximum [Member] | Share Options [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Maximum term of share rights granted under share incentive plan   10 years                
Changyou [Member] | Changyou 2014 Share Incentive Plan [Member] | Certain members of management and certain other employees [Member] | Class A restricted share units [Member] | Share Options [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of shares under contractually granted share options                 2,416,000  
Changyou [Member] | Changyou 2014 Share Incentive Plan [Member] | Certain members of management and certain other employees [Member] | Class A restricted share units [Member] | Maximum [Member] | Share Options [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of Class A restricted share units converted to options               2,400,000    
Changyou [Member] | Changyou 2014 and 2019 Share Incentive Plan [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Total fair value of stock options granted   $ 23,500,000                
Changyou [Member] | Changyou 2014 and 2019 Share Incentive Plan [Member] | Class A Ordinary Shares [Member] | Share Options [Member] | Changyou Merger [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Accrued fixed price, final 5.39                  
Share Based Compensation Arrangement By Share Based Payment Award Options Accrued Fixed Price Initial 5.39                  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Not Exercisable in Period, Conditionally Repurchased, Exercise Price $ 5.39