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Balance Sheet Components - Components of Content Assets (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]    
Content assets, net $ 17,095,733 $ 14,681,989
Current content assets, net 4,803,663 4,310,934
Non-current content assets, net $ 12,292,070 10,371,055
Average produced content asset amortization percentage 90.00%  
Average produced content asset amortization period 4 years  
Average unamortized cost percentage 30.00%  
Average amortization period of unamortized cost at balance sheet date 1 year  
Finite lived intangible assets amortization period tranche one 1 year  
Finite lived intangible assets amortization period tranche two 3 years  
Licensed content    
Finite-Lived Intangible Assets [Line Items]    
Net content $ 13,032,400 11,771,778
Produced content    
Finite-Lived Intangible Assets [Line Items]    
Net content 1,786,221 1,427,256
In production 2,085,501 1,311,137
In development and pre-production 179,060 158,517
Content assets, net $ 4,050,782 2,896,910
Produced content amortization percentage over one year 30.00%  
Produced content amortization percent over three years 81.00%  
DVD    
Finite-Lived Intangible Assets [Line Items]    
Content assets, net $ 12,551 $ 13,301