ACQUISITIONS AND DISPOSITIONS OF ASSETS - Pro Forma Results (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Pro Forma Information
Total revenues	$ 6,689	$ 6,874
Net income	328	732
Net income attributable to Sinclair Broadcast Group	$ 130	$ 524
Basic earnings per share attributable to Sinclair Broadcast Group (in dollars per share)	$ 1.41	$ 5.20
Diluted earnings per share attributable to Sinclair Broadcast Group (in dollars per share)	$ 1.39	$ 5.16