Commitments and Contingencies (Expected Timing of Payments for Commitments) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Less than one year	$ 8,611,398	$ 7,446,947
Due after one year and through 3 years	8,841,561	8,210,159
Due after 3 years and through 5 years	1,684,582	1,894,001
Due after 5 years	148,334	143,535
Total streaming content obligations	$ 19,285,875	$ 17,694,642