Segment Information - Narrative (Detail) - Television - US	3 Months Ended
	Sep. 30, 2021 Fullpowertvstation duopoly
Segment Reporting Information [Line Items]
Full power broadcast television stations	29
Duopolies | duopoly	11
FOX Network
Segment Reporting Information [Line Items]
Full power broadcast television stations	18
MyNetworkTV
Segment Reporting Information [Line Items]
Full power broadcast television stations	10
Independent Station
Segment Reporting Information [Line Items]
Full power broadcast television stations	1