Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical)

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Statement of Comprehensive Income [Abstract]      
Pension and postretirement, tax $ (7.7) $ 1.3 $ (10.9)
Net unrealized (loss) gain on derivative instruments, tax $ (3.5) $ 0.0 $ 1.0