Intangible Assets and Goodwill (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		12 Months Ended
	Jan. 31, 2021	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Goodwill [Line Items]
Amortization expense				$ 90.7	$ 142.9	$ 155.1
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Expected future amortization expense, 2022				45.1
Expected future amortization expense, 2023				42.6
Expected future amortization expense, 2024				34.5
Expected future amortization expense, 2025				17.1
Expected future amortization expense, 2026				6.6
Impairment of indefinite lived intangible assets			$ 5.2
Income tax benefit		$ 26.9		$ (87.0)	32.2	(11.5)
National Media
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Impairment of intangible assets and goodwill					26.4	$ 41.8
Income tax benefit		26.9
Local Media
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Impairment of intangible assets and goodwill					$ 22.3
Trademark | National Media
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Proceeds from sale of intangible and other assets	$ 12.0
Trademark | National Media | Impairment of goodwill and other long-lived assets
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Impairment of indefinite lived intangible assets		21.2
Trademark | Local Media | Impairment of goodwill and other long-lived assets
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Impairment of indefinite lived intangible assets		$ 22.3