SEGMENT DATA - Segment Financial Information (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Segment data
Assets	[1]	$ 12,780		$ 12,780		$ 13,382
Revenues		1,612	$ 1,283	3,123	$ 2,892
Depreciation of property and equipment and amortization of definite-lived intangibles and other assets		147	176	300	350
Amortization of sports programming rights		829	5	1,381	396
Amortization of program contract costs		22	21	45	44
Corporate general and administrative expenses		36	32	97	81
(Gain) loss on asset dispositions and other, net of impairment		(8)	(28)	(22)	(60)
Operating income (loss)		(178)	492	(143)	819
Interest expense including amortization of debt discount and deferred financing costs		160	165	311	345
Income (loss) from equity method investments		2	(7)	11	(13)
Intersegment revenues		27	25	54	49
Intersegment selling, general, and administrative expenses		27	25	54	49
Operating Segments | Broadcast
Segment data
Assets		4,671		4,671
Revenues		687	592	1,352	1,292
Depreciation of property and equipment and amortization of definite-lived intangibles and other assets		64	60	126	118
Amortization of sports programming rights		0	0	0	0
Amortization of program contract costs		17	21	38	44
Corporate general and administrative expenses		29	27	84	70
(Gain) loss on asset dispositions and other, net of impairment		(3)	(29)	(17)	(60)
Operating income (loss)		105	83	168	234
Interest expense including amortization of debt discount and deferred financing costs		1	1	2	2
Income (loss) from equity method investments		0	0	0	0
Operating Segments | Local sports
Segment data
Assets		5,845		5,845
Revenues		838	616	1,606	1,428
Depreciation of property and equipment and amortization of definite-lived intangibles and other assets		78	109	162	219
Amortization of sports programming rights		829	5	1,381	396
Amortization of program contract costs		0	0	0	0
Corporate general and administrative expenses		3	2	6	4
(Gain) loss on asset dispositions and other, net of impairment		0	0	0	0
Operating income (loss)		(288)	399	(329)	565
Interest expense including amortization of debt discount and deferred financing costs		110	117	218	240
Income (loss) from equity method investments		10	2	23	8
Other & Corporate
Segment data
Assets		2,275		2,275
Revenues		120	104	228	233
Depreciation of property and equipment and amortization of definite-lived intangibles and other assets		6	7	14	13
Amortization of sports programming rights		0	0	0	0
Amortization of program contract costs		5	0	7	0
Corporate general and administrative expenses		4	3	7	7
(Gain) loss on asset dispositions and other, net of impairment		(5)	1	(5)	0
Operating income (loss)		4	12	17	26
Interest expense including amortization of debt discount and deferred financing costs		51	50	96	108
Income (loss) from equity method investments		(8)	(9)	(12)	(21)
Eliminations
Segment data
Assets		(11)		(11)
Revenues		(33)	(29)	(63)	(61)
Depreciation of property and equipment and amortization of definite-lived intangibles and other assets		(1)	0	(2)	0
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
Operating income (loss)		1	(2)	1	(6)
Interest expense including amortization of debt discount and deferred financing costs		(2)	(3)	(5)	(5)
Income (loss) from equity method investments		$ 0	$ 0	$ 0	$ 0

[1] Our consolidated total assets as of June 30, 2021 and December 31, 2020 include total assets of variable interest entities (VIEs) of $219 million and $233 million, respectively, which can only be used to settle the obligations of the VIEs. Our consolidated total liabilities as of June 30, 2021 and December 31, 2020 include total liabilities of VIEs of $56 million and $60 million, respectively, for which the creditors of the VIEs have no recourse to us. See Note 9. Variable Interest Entities.