Discontinued Operations and Dispositions - Amounts Applicable to Discontinued Operations in Income (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended
Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) from discontinued operations, net of income taxes	$ 0.0	$ 5.0	$ 0.0	$ (25.3)
Gain (loss) per share from discontinued operations, basic (in usd per share)	$ 0	$ 0.11	$ 0	$ (0.56)
Gain (loss) per share from discontinued operations, diluted (in usd per share)	$ 0	$ 0.11	$ 0	$ (0.56)
Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues		$ 1.3		$ 112.1
Costs and expenses		(1.0)		(108.6)
Impairment of goodwill		0.0		(16.0)
Interest expense		(0.1)		(2.1)
Gain on disposal		9.3		12.3
Earnings (loss) before income taxes		9.5		(2.3)
Income tax expense		(4.5)		(23.0)
Gain (loss) from discontinued operations, net of income taxes		$ 5.0		$ (25.3)
Gain (loss) per share from discontinued operations, basic (in usd per share)		$ 0.11		$ (0.56)
Gain (loss) per share from discontinued operations, diluted (in usd per share)		$ 0.11		$ (0.56)

Disposal Group, Including Discontinued Operation, Goodwill, Impairment Loss

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Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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Per basic share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation.

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Per diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation.

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Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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Amount of costs of goods sold attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of interest expense attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.

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Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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