Fair Value Measurements (Schedule of Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis) (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($) trademark	Sep. 30, 2019 USD ($) trademark	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Total losses, impairment charges	$ (87.9)		$ 0.0	$ (405.3)	$ (50.3)
Total losses, intangible assets		$ (5.2)
Goodwill			1,719.3	1,719.3
Trademark
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Number of impaired trademarks | trademark	4	1
Recurring fair value measurements
Recurring fair value measurements
Cash and cash equivalents - cash equivalents			112.6	115.2
Accrued expenses
Contingent consideration			2.2	1.3
Deferred compensation plans			2.1	3.4
Other noncurrent liabilities
Contingent consideration			1.6	3.6
Deferred compensation plans			13.6	13.5
Total recurring liability fair value measurements			19.5	21.8
Nonrecurring fair value measurements
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Net property, plant, and equipment				16.7
Operating lease assets				46.3
Intangible assets, net				77.9
Goodwill				1,602.5
Total nonrecurring fair value measurements				1,743.4
Total losses, impairment charges				(389.3)
Total losses, goodwill impairment				(252.7)
National Media
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Total losses, goodwill impairment	$ (252.7)			(252.7)
Goodwill			1,602.7	1,602.7	1,862.8
National Media | Trademark
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Number of impaired trademarks | trademark	5
Local Media
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Goodwill			116.6	116.6	$ 116.6
Net property, plant and equipment | Nonrecurring fair value measurements
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Total losses, impairment charges				(23.4)
Operating Lease assets | Nonrecurring fair value measurements
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Total losses, impairment charges				(64.5)
Operating Lease assets | National Media
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Total losses, impairment charges	$ (64.5)
Intangible assets, net | Nonrecurring fair value measurements
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Total losses, intangible assets				(48.7)
Level 1 | Recurring fair value measurements
Recurring fair value measurements
Cash and cash equivalents - cash equivalents			112.6	115.2
Accrued expenses
Contingent consideration			0.0	0.0
Deferred compensation plans			0.0	0.0
Other noncurrent liabilities
Contingent consideration			0.0	0.0
Deferred compensation plans			0.0	0.0
Total recurring liability fair value measurements			0.0	0.0
Level 1 | Nonrecurring fair value measurements
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Net property, plant, and equipment				0.0
Operating lease assets				0.0
Intangible assets, net				0.0
Goodwill				0.0
Total nonrecurring fair value measurements				0.0
Level 2 | Recurring fair value measurements
Recurring fair value measurements
Cash and cash equivalents - cash equivalents			0.0	0.0
Accrued expenses
Contingent consideration			0.0	0.0
Deferred compensation plans			2.1	3.4
Other noncurrent liabilities
Contingent consideration			0.0	0.0
Deferred compensation plans			13.6	13.5
Total recurring liability fair value measurements			15.7	16.9
Level 2 | Nonrecurring fair value measurements
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Net property, plant, and equipment				0.0
Operating lease assets				0.0
Intangible assets, net				0.0
Goodwill				0.0
Total nonrecurring fair value measurements				0.0
Level 3 | Recurring fair value measurements
Recurring fair value measurements
Cash and cash equivalents - cash equivalents			0.0	0.0
Accrued expenses
Contingent consideration			2.2	1.3
Deferred compensation plans			0.0	0.0
Other noncurrent liabilities
Contingent consideration			1.6	3.6
Deferred compensation plans			0.0	0.0
Total recurring liability fair value measurements			$ 3.8	4.9
Level 3 | Nonrecurring fair value measurements
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Net property, plant, and equipment				16.7
Operating lease assets				46.3
Intangible assets, net				77.9
Goodwill				1,602.5
Total nonrecurring fair value measurements				$ 1,743.4
Level 3 | National Media | Nonrecurring fair value measurements
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Goodwill	1,855.2
Level 3 | Net property, plant and equipment | Nonrecurring fair value measurements
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Carrying value	40.1
Level 3 | Operating Lease assets | Nonrecurring fair value measurements
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Carrying value	110.8
Level 3 | Finite-Lived Intangible Assets | Local Media | Nonrecurring fair value measurements
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Carrying value	$ 126.6