Commitments and Contingencies - Streaming Content (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Contractual Obligation [Line Items]
Total streaming content obligations	$ 19,141,543	$ 19,285,875
Streaming obligations not reflected on Consolidated Balance Sheets	10,800,000	10,800,000
Current content liabilities
Contractual Obligation [Line Items]
Streaming obligations included in content liabilities	4,900,000	4,700,000
Non-current content liabilities
Contractual Obligation [Line Items]
Streaming obligations included in content liabilities	$ 3,400,000	$ 3,800,000