ACQUISITIONS AND DISPOSITIONS OF ASSETS - Fair Value Of Acquired Assets and Liabilities, RSN (Details) - USD ($) $ in Millions			4 Months Ended	12 Months Ended
	Dec. 31, 2019	Aug. 23, 2019	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allocation
Goodwill	$ 4,716.0		$ 4,716.0	$ 4,716.0	$ 2,124.0	$ 2,124.0
Purchase price, net of cash acquired				8,999.0	0.0	$ 271.0
Adjustments
Goodwill					$ 0.0
RSN
Allocation
Cash and cash equivalents	824.0	$ 823.0	824.0	824.0
Accounts receivable, net	606.0	604.0	606.0	606.0
Prepaid expenses and other current assets	175.0	176.0	175.0	175.0
Property and equipment, net	25.0	25.0	25.0	25.0
Definite-lived intangible assets, net	6,725.0	7,676.0	6,725.0	6,725.0
Other assets	52.0	52.0	52.0	52.0
Accounts payable and accrued liabilities	(181.0)	(261.0)	(181.0)	(181.0)
Other long-term liabilities	(396.0)	(579.0)	(396.0)	(396.0)
Goodwill	2,615.0	1,924.0	2,615.0	2,615.0
Fair value of identifiable net assets acquired	10,445.0	10,440.0	10,445.0	10,445.0
Redeemable noncontrolling interests	(380.0)	(380.0)	(380.0)	(380.0)
Noncontrolling interests	(248.0)	(231.0)	(248.0)	(248.0)
Gross purchase price	9,817.0	9,829.0	9,817.0	$ 9,817.0
Purchase price, net of cash acquired	$ 8,993.0	$ 9,006.0
Adjustments
Cash and cash equivalents			1.0
Accounts receivable, net			2.0
Prepaid expenses and other current assets			(1.0)
Definite-lived intangible assets, net			(951.0)
Accounts payable and accrued liabilities			80.0
Other long-term liabilities			183.0
Goodwill			691.0
Fair value of identifiable net assets acquired			5.0
Noncontrolling interests			(17.0)
Gross purchase price			(12.0)
Purchase price, net of cash acquired			$ (13.0)