Balance Sheet Components - Components of Content Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Content assets, net	$ 15,941,325	$ 14,681,989
Current content assets, net	4,626,522	4,310,934
Non-current content assets, net	$ 11,314,803	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
Finite lived intangible assets amortization period tranche three	4 years
Licensed content
Finite-Lived Intangible Assets [Line Items]
Net content	$ 12,508,344	11,771,778
Produced content
Finite-Lived Intangible Assets [Line Items]
Net content	1,643,252	1,427,256
In production	1,613,898	1,311,137
In development and pre-production	161,497	158,517
Content assets, net	$ 3,418,647	2,896,910
Produced content amortization percentage over one year	29.00%
Produced content amortization percent over three years	79.00%
Produced content amortization period over the next 48 months (more than)	80.00%
DVD
Finite-Lived Intangible Assets [Line Items]
Content assets, net	$ 14,334	$ 13,301