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Unaudited Consolidated Statements of Stockholders' Equity (Parentheticals) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020
Pension and OPEB adjustments, tax | $ 0.4 | $ 0.3 | $ 0.8 | $ 0.7
Change in fair value of derivatives, tax | $ 0.6 | $ 0.1 | $ 0.7 | $ 0.2
Dividends declared, per share (in dollars per share) | $ 0.26 | $ 0.24 | $ 0.50 | $ 0.46

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