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Consolidated Statements of Stockholders' Equity (Parentheticals) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
AOCI Attributable to Parent [Member] |  |  |
Pension and OPEB adjustments, tax | $ 2.9 | $ 3.4 | $ 8.4
Change in fair value of derivatives, tax | $ 0.4 | $ 0.3 | $ 0.2
Retained Earnings [Member] |  |  |
Dividends declared, per share (in dollars per share) | $ 0.70 | $ 0.62 | $ 0.54

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