SEGMENT DATA - Segment Financial Information (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Segment data
Assets	[1]	$ 12,845		$ 12,845		$ 13,382
Revenue		1,535	$ 1,539	4,658	$ 4,431
Depreciation of property and equipment and amortization of definite-lived intangibles and other assets		148	174	448	524
Amortization of sports programming rights		531	632	1,912	1,028
Amortization of program contract costs		22	19	67	63
Corporate general and administrative expenses		35	30	132	111
(Gain) loss on asset dispositions and other, net of impairment		(4)	(39)	(26)	(99)
Impairment of goodwill and definite-lived intangible assets		0	4,264	0	4,264
Operating income (loss)		73	(4,216)	(70)	(3,397)
Interest expense including amortization of debt discount and deferred financing costs		155	157	466	502
Income (loss) from equity method investments		12	(10)	23	(23)
Intersegment revenues		28	26	82	75
Intersegment selling, general, and administrative expenses		28	26	82	75
Operating Segments | Broadcast
Segment data
Assets		4,712		4,712
Revenue		701	734	2,053	2,026
Depreciation of property and equipment and amortization of definite-lived intangibles and other assets		61	60	187	178
Amortization of sports programming rights		0	0	0	0
Amortization of program contract costs		18	19	56	63
Corporate general and administrative expenses		30	25	114	95
(Gain) loss on asset dispositions and other, net of impairment		(6)	(41)	(23)	(101)
Impairment of goodwill and definite-lived intangible assets			0		0
Operating income (loss)		126	221	294	455
Interest expense including amortization of debt discount and deferred financing costs		1	2	3	4
Income (loss) from equity method investments		0	0	0	0
Operating Segments | Local sports
Segment data
Assets		5,711		5,711
Revenue		759	727	2,365	2,155
Depreciation of property and equipment and amortization of definite-lived intangibles and other assets		79	109	241	328
Amortization of sports programming rights		531	632	1,912	1,028
Amortization of program contract costs		0	0	0	0
Corporate general and administrative expenses		2	3	8	7
(Gain) loss on asset dispositions and other, net of impairment		0	0	0	0
Impairment of goodwill and definite-lived intangible assets			4,264		4,264
Operating income (loss)		(39)	(4,450)	(368)	(3,885)
Interest expense including amortization of debt discount and deferred financing costs		109	111	327	351
Income (loss) from equity method investments		12	(2)	35	6
Other & Corporate
Segment data
Assets		2,435		2,435
Revenue		117	105	345	338
Depreciation of property and equipment and amortization of definite-lived intangibles and other assets		9	6	23	19
Amortization of sports programming rights		0	0	0	0
Amortization of program contract costs		4	0	11	0
Corporate general and administrative expenses		3	2	10	9
(Gain) loss on asset dispositions and other, net of impairment		2	2	(3)	2
Impairment of goodwill and definite-lived intangible assets			0		0
Operating income (loss)		(12)	10	5	38
Interest expense including amortization of debt discount and deferred financing costs		48	48	144	156
Income (loss) from equity method investments		0	(8)	(12)	(29)
Eliminations
Segment data
Assets		(13)		(13)
Revenue		(42)	(27)	(105)	(88)
Depreciation of property and equipment and amortization of definite-lived intangibles and other assets		(1)	(1)	(3)	(1)
Amortization of sports programming rights		0	0	0	0
Amortization of program contract costs		0	0	0	0
Corporate general and administrative expenses		0	0	0	0
(Gain) loss on asset dispositions and other, net of impairment		0	0	0	0
Impairment of goodwill and definite-lived intangible assets			0		0
Operating income (loss)		(2)	3	(1)	(5)
Interest expense including amortization of debt discount and deferred financing costs		(3)	(4)	(8)	(9)
Income (loss) from equity method investments		$ 0	$ 0	$ 0	$ 0

[1] Our consolidated total assets as of September 30, 2021 and December 31, 2020 include total assets of variable interest entities (VIEs) of $214 million and $233 million, respectively, which can only be used to settle the obligations of the VIEs. Our consolidated total liabilities as of September 30, 2021 and December 31, 2020 include total liabilities of VIEs of $83 million and $60 million, respectively, for which the creditors of the VIEs have no recourse to us. See Note 9. Variable Interest Entities.