CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 105	$ 346	$ 594
Adjustments to post-retirement obligations, net of taxes	(1)	1	(1)
Comprehensive income	104	347	593
Comprehensive income attributable to redeemable noncontrolling interests	(48)	0	0
Comprehensive income attributable to noncontrolling interests	(10)	(5)	(18)
Comprehensive income attributable to Sinclair Broadcast Group	$ 46	$ 342	$ 575