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CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical)
$ in Millions
3 Months Ended
Dec. 31, 2019
USD ($)
$ / shares
Statement Of Stockholders Equity [Abstract]  
Employee pension and postretirement benefits, tax | $ $ 0.2
Cash dividends declared per share on common stock (in dollars per share) | $ / shares $ 0.30