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