Acquisitions and Dispositions - Schedule of Assumptions Used in Valuation of FCC Licenses (Detail)	3 Months Ended		12 Months Ended
	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2022
Measurement Input, Discount Rate [Member]
Fair Value Inputs Asset Quantitative Information [Line Items]
Revenue growth rates	9.50%	9.50%
Minimum [Member]
Fair Value Inputs Asset Quantitative Information [Line Items]
Market revenue shares at maturity	0.70%	0.60%
Operating income margins at maturity	19.70%	19.20%
Minimum [Member] \| Measurement Input, Long-term Revenue Growth Rate [Member]
Fair Value Inputs Asset Quantitative Information [Line Items]
Revenue growth rates	0.30%	(1.90%)
Maximum [Member]
Fair Value Inputs Asset Quantitative Information [Line Items]
Market revenue shares at maturity	44.70%	44.00%
Operating income margins at maturity	30.40%	32.60%
Maximum [Member] \| Measurement Input, Long-term Revenue Growth Rate [Member]
Fair Value Inputs Asset Quantitative Information [Line Items]
Revenue growth rates	2.70%	15.90%
FCC License [Member]
Fair Value Inputs Asset Quantitative Information [Line Items]
Market revenue shares at maturity			5.20%
Operating income margins at maturity			23.30%
FCC License [Member] \| Measurement Input, Discount Rate [Member]
Fair Value Inputs Asset Quantitative Information [Line Items]
Revenue growth rates			9.50%
FCC License [Member] \| Minimum [Member] \| Measurement Input, Long-term Revenue Growth Rate [Member]
Fair Value Inputs Asset Quantitative Information [Line Items]
Revenue growth rates			0.30%
FCC License [Member] \| Maximum [Member] \| Measurement Input, Long-term Revenue Growth Rate [Member]
Fair Value Inputs Asset Quantitative Information [Line Items]
Revenue growth rates			1.50%