Content Rights (Schedule Of Content Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Content amortization	$ 762	$ 696	$ 2,110	$ 2,071
Other production charges	96	96	202	300
Content impairments	1	4	8	7
Total content expense	$ 859	$ 796	$ 2,320	$ 2,378