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Taxation (PRC Corporate Income Tax) (Details)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Tax and Tax Rate [Line Items]      
Statutory income tax rate 25.00% 25.00% 25.00%
Guangzhou Qianjun Network Technology Co., Ltd. [Member]      
Income Tax and Tax Rate [Line Items]      
Preferential income tax rate 15.00%    
State Administration of Taxation, China [Member]      
Income Tax and Tax Rate [Line Items]      
Statutory income tax rate 25.00%    
State Administration of Taxation, China [Member] | High and New Technology Enterprises [Member]      
Income Tax and Tax Rate [Line Items]      
Preferential income tax rate 15.00%    
Preferential income tax rate period (years) 3 years    
State Administration of Taxation, China [Member] | High and New Technology Enterprises [Member] | Video Tianjin [Member]      
Income Tax and Tax Rate [Line Items]      
Preferential income tax rate 15.00%    
State Administration of Taxation, China [Member] | High and New Technology Enterprises [Member] | Sohu Internet [Member]      
Income Tax and Tax Rate [Line Items]      
Preferential income tax rate 15.00%    
State Administration of Taxation, China [Member] | High and New Technology Enterprises [Member] | Sohu New Momentum [Member]      
Income Tax and Tax Rate [Line Items]      
Preferential income tax rate 15.00%    
State Administration of Taxation, China [Member] | High and New Technology Enterprises [Member] | Sohu Media [Member]      
Income Tax and Tax Rate [Line Items]      
Preferential income tax rate 15.00%    
State Administration of Taxation, China [Member] | High and New Technology Enterprises [Member] | Gamease [Member]      
Income Tax and Tax Rate [Line Items]      
Preferential income tax rate 15.00%    
State Administration of Taxation, China [Member] | High and New Technology Enterprises [Member] | AmazGame [Member]      
Income Tax and Tax Rate [Line Items]      
Preferential income tax rate 15.00%    
State Administration of Taxation, China [Member] | High and New Technology Enterprises [Member] | Gamespace [Member]      
Income Tax and Tax Rate [Line Items]      
Preferential income tax rate 15.00%    
State Administration of Taxation, China [Member] | High and New Technology Enterprises [Member] | Changyou Chuangxiang [Member]      
Income Tax and Tax Rate [Line Items]      
Preferential income tax rate 15.00%    
State Administration of Taxation, China [Member] | Software Enterprise [Member]      
Income Tax and Tax Rate [Line Items]      
Preferential income tax rate 12.50%    
Preferential income tax rate period (years) 3 years    
Income tax exemption period beginning with first profitable year 2 years    
Tax rate reduction rate 50.00%    
State Administration of Taxation, China [Member] | Software Enterprise [Member] | Changyou Chuangxiang [Member]      
Income Tax and Tax Rate [Line Items]      
Preferential income tax rate   12.50%