CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (328)	$ 273	$ (302)	$ 424
Share of other comprehensive (loss) income of equity method investments	(3)	(9)	5	(9)
Comprehensive (loss) income	(331)	264	(297)	415
Comprehensive income attributable to the redeemable noncontrolling interests	(5)	(12)	(9)	(32)
Comprehensive loss (income) attributable to the noncontrolling interests	1	(9)	(33)	(17)
Comprehensive (loss) income attributable to Sinclair Broadcast Group	$ (335)	$ 243	$ (339)	$ 366