Assets Held-for-Sale, Discontinued Operations, and Dispositions - Amounts Applicable to Discontinued Operations in Income (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended			6 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations, net of income taxes	$ (24.3)		$ (69.5)	$ (30.3)	$ (68.7)
Basic earnings (loss) per share form discontinued operations (in usd per share)	$ (0.54)		$ (1.53)	$ (0.66)	$ (1.52)
Diluted earnings (loss) per share form discontinued operations (in usd per share)	$ (0.51)		$ (1.47)	$ (0.66)	$ (1.46)
Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 25.3		$ 128.2	$ 110.8	$ 251.9
Costs and expenses	(20.9)		(109.6)	(107.6)	(225.9)
Impairment of goodwill	(11.8)	$ (4.2)	0.0	(16.0)	0.0
Interest expense	(0.8)		(9.3)	(2.0)	(15.7)
Gain on disposal	3.0		0.0	3.0	0.0
Earnings (loss) before income taxes	(5.2)		9.3	(11.8)	10.3
Income tax expense	(19.1)		(78.8)	(18.5)	(79.0)
Loss from discontinued operations, net of income taxes	$ (24.3)		$ (69.5)	$ (30.3)	$ (68.7)
Basic earnings (loss) per share form discontinued operations (in usd per share)	$ (0.54)		$ (1.53)	$ (0.66)	$ (1.52)
Diluted earnings (loss) per share form discontinued operations (in usd per share)	$ (0.51)		$ (1.47)	$ (0.66)	$ (1.46)