Accounting Policies - Video and Music Content (Details) - USD ($) $ in Billions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Accounting Policies [Abstract]
Video and Music Content, Capitalized Costs	$ 6.1		$ 5.8
Video and Music Content, Expense	$ 2.4	$ 1.7