Commitments and Contingencies (Streaming Content) (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Contractual Obligation [Line Items]
Total streaming content obligations	$ 14,479,487	$ 10,902,231
Current content liabilities	3,632,711	2,789,023
Non-current content liabilities	2,894,654	2,026,360
Unrecorded streaming obligations	8,000,000	6,100,000
Current Content Liabilities [Member]
Contractual Obligation [Line Items]
Current content liabilities	3,632,700	2,789,000
Non-current Content Liabilities [Member]
Contractual Obligation [Line Items]
Non-current content liabilities	$ 2,900,000	$ 2,000,000