Restructuring and Other Charges (Liabilities) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020 USD ($)
Restructuring Reserve
Beginning balance	$ 18
Employee termination accruals, net	71
Other accruals	4
Cash paid	(30)
Ending balance	63
Corporate, inter-segment eliminations, and other
Restructuring Reserve
Beginning balance	9
Employee termination accruals, net	13
Other accruals	4
Cash paid	(4)
Ending balance	22
U.S. Networks | Operating Segments
Restructuring Reserve
Beginning balance	4
Employee termination accruals, net	41
Other accruals	0
Cash paid	(19)
Ending balance	26
International Networks | Operating Segments
Restructuring Reserve
Beginning balance	5
Employee termination accruals, net	17
Other accruals	0
Cash paid	(7)
Ending balance	$ 15