Financial Information about Industry Segments (Details) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) segment measure	Dec. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			2
Number of principal financial measures | measure			2
Total revenues	$ 810.5	$ 878.4	$ 1,535.7	$ 1,652.8
Income from operations	133.9	133.7	176.8	187.9
Non-operating income (expense), net	(7.2)	5.9	1.4	13.2
Interest expense, net	(36.9)	(50.9)	(75.8)	(92.5)
Earnings from continuing operations before income taxes	89.8	88.7	102.4	108.6
Depreciation and amortization	58.6	65.1	117.1	128.8
Operating segments
Segment Reporting Information [Line Items]
Total revenues	811.2	878.6	1,536.9	1,653.6
Operating segments | National media
Segment Reporting Information [Line Items]
Total revenues	597.2	616.2	1,130.1	1,176.8
Income from operations	100.5	47.0	128.6	65.1
Depreciation and amortization	47.8	55.1	95.2	107.4
Operating segments | Local media
Segment Reporting Information [Line Items]
Total revenues	214.0	262.4	406.8	476.8
Income from operations	54.8	106.6	93.2	174.1
Depreciation and amortization	9.9	9.2	19.5	18.3
Unallocated corporate
Segment Reporting Information [Line Items]
Income from operations	(21.4)	(19.9)	(45.0)	(51.3)
Depreciation and amortization	0.9	0.8	2.4	3.1
Intersegment eliminations
Segment Reporting Information [Line Items]
Total revenues	$ (0.7)	$ (0.2)	$ (1.2)	$ (0.8)