GOODWILL, INDEFINITE-LIVED INTANGIBLE ASSETS AND OTHER INTANGIBLE ASSETS - Definite Lived Intangible Assets (Details) - USD ($)		12 Months Ended
	Aug. 23, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amortized intangible assets:
Finite-lived intangible assets, net		$ 5,624,000,000	$ 7,977,000,000
Impairment charge			0	$ 0
Estimated amortization expense of the definite-lived intangible assets
2021		559,000,000
2022		542,000,000
2023		530,000,000
2024		517,000,000
2025		505,000,000
2026 and thereafter		2,971,000,000
Finite-lived intangible assets, net		5,624,000,000	7,977,000,000
Customer relationships
Amortized intangible assets:
Gross Carrying Value		5,329,000,000	6,548,000,000
Accumulated Amortization		(1,043,000,000)	(569,000,000)
Finite-lived intangible assets, net		4,286,000,000	5,979,000,000
Impairment charge		1,218,000,000
Estimated amortization expense of the definite-lived intangible assets
Finite-lived intangible assets, net		4,286,000,000	5,979,000,000
Other defined-lived intangible assets
Amortized intangible assets:
Gross Carrying Value		2,313,000,000	2,758,000,000
Accumulated Amortization		(975,000,000)	(760,000,000)
Finite-lived intangible assets, net		1,338,000,000	1,998,000,000
Impairment charge		431,000,000
Estimated amortization expense of the definite-lived intangible assets
Finite-lived intangible assets, net		1,338,000,000	1,998,000,000
Network affiliation
Amortized intangible assets:
Gross Carrying Value		1,438,000,000	1,441,000,000
Accumulated Amortization		(775,000,000)	(689,000,000)
Finite-lived intangible assets, net		663,000,000	752,000,000
Estimated amortization expense of the definite-lived intangible assets
Finite-lived intangible assets, net		663,000,000	752,000,000
Favorable sports contracts
Amortized intangible assets:
Gross Carrying Value		840,000,000	1,271,000,000
Accumulated Amortization		(174,000,000)	(43,000,000)
Finite-lived intangible assets, net		666,000,000	1,228,000,000
Impairment charge		431,000,000
Estimated amortization expense of the definite-lived intangible assets
Finite-lived intangible assets, net		666,000,000	1,228,000,000
Other
Amortized intangible assets:
Gross Carrying Value		35,000,000	46,000,000
Accumulated Amortization		(26,000,000)	(28,000,000)
Finite-lived intangible assets, net		9,000,000	18,000,000
Estimated amortization expense of the definite-lived intangible assets
Finite-lived intangible assets, net		$ 9,000,000	18,000,000
RSN
Amortized intangible assets:
Finite-lived intangible assets acquired	$ 6,725,000,000		$ 6,725,000,000
RSN | Customer relationships
Amortized intangible assets:
Finite-lived intangible assets acquired	5,439,000,000
RSN | Favorable sports contracts
Amortized intangible assets:
Finite-lived intangible assets acquired	$ 1,271,000,000