Financial Information about Industry Segments - Financial Information by Segment (Details) $ in Millions	3 Months Ended
	Sep. 30, 2020 USD ($) segment measure	Sep. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	2
Number of principal financial measures | measure	2
Total revenues	$ 693.5	$ 725.2
Income from operations	78.1	42.9
Non-operating income, net	5.6	8.6
Interest expense, net	(43.5)	(38.9)
Earnings from continuing operations before income taxes	40.2	12.6
Depreciation and amortization	49.0	58.5
Operating Segments
Segment Reporting Information [Line Items]
Total revenues	693.7	725.7
Operating Segments | National Media
Segment Reporting Information [Line Items]
Total revenues	467.7	532.9
Income from operations	31.5	28.1
Depreciation and amortization	40.0	47.4
Operating Segments | Local Media
Segment Reporting Information [Line Items]
Total revenues	226.0	192.8
Income from operations	63.8	38.4
Depreciation and amortization	8.6	9.6
Unallocated Corporate
Segment Reporting Information [Line Items]
Income from operations	(17.2)	(23.6)
Depreciation and amortization	0.4	1.5
Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenues	$ (0.2)	$ (0.5)