Balance Sheet Components (Components of Content Library) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Total content assets, net	$ 20,112,140	$ 14,681,989
Current content assets, net	5,151,186	4,310,934
Non-current content assets, net	$ 14,960,954	10,371,055
Average produced content asset amortization percentage (more than)	90.00%
Average produced content asset amortization period (in years)	4 years
Average unamortized cost percentage (more than)	30.00%
Average amortization period of unamortized cost at balance sheet date (in years)	1 year
Produced content, amortization period, tranche one (in years)	1 year
Produced content, amortization period, tranche two (in years)	2 years
Produced content, amortization period, tranche three (in years)	3 years
Deferred revenue	$ 760,899	618,622
Gift Cards and Other Prepaid Memberships
Finite-Lived Intangible Assets [Line Items]
Deferred revenue		142,000
Licensed content, net
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	14,081,463	11,771,778
Produced content, net
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	2,403,896	1,427,256
In production	3,305,126	1,311,137
In development and pre-production	311,842	158,517
Total content assets, net	$ 6,020,864	2,896,910
Produced content, amortization period, tranche one, percent	33.00%
Produced content, amortization period, tranche two, percent	82.00%
DVD, net
Finite-Lived Intangible Assets [Line Items]
Total content assets, net	$ 9,813	$ 13,301