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Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
AOCI Attributable to Parent [Member]
Pension and OPEB adjustments, tax	$ 0.3		$ 0.8
Change in fair value of derivatives, tax	$ 0.2		$ 0.4
Retained Earnings [Member]
Dividends declared, per share (in dollars per share)	$ 0.20	$ 0.18	$ 0.58	$ 0.52
Pension and OPEB adjustments, tax		$ 0.3		$ 0.9
Change in fair value of derivatives, tax		$ 0.2		$ 0.3
Dividends declared, per share (in dollars per share)	$ 0.20	$ 0.18	$ 0.58	$ 0.52

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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

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Amount of tax expense (benefit), after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.

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