CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 17	$ (3,367)	$ (285)	$ (2,943)
Share of other comprehensive income (loss) of equity method investments	1	0	6	(9)
Comprehensive income (loss)	18	(3,367)	(279)	(2,952)
Comprehensive income attributable to the redeemable noncontrolling interests	(4)	(19)	(13)	(51)
Comprehensive loss (income) attributable to the noncontrolling interests	6	130	(27)	113
Comprehensive income (loss) attributable to Sinclair Broadcast Group	$ 20	$ (3,256)	$ (319)	$ (2,890)