Discontinued Operations / Assets Held-for-Sale - Amounts Applicable to Discontinued Operations in Income (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Sep. 30, 2018	Sep. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of income taxes	$ 1.0	$ 0.0
Basic earnings per share for discontinued operations (in usd per share)	$ 0.02	$ 0.00
Diluted earnings per share for discontinued operations (in usd per share)	$ 0.02	$ 0.00
Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 125.5
Costs and expenses	(117.6)
Interest expense	(6.6)
Earnings before income taxes	1.3
Income taxes	(0.3)
Income from discontinued operations, net of income taxes	$ 1.0
Basic earnings per share for discontinued operations (in usd per share)	$ 0.02
Diluted earnings per share for discontinued operations (in usd per share)	$ 0.02

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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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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