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Consolidated Statement of Stockholders' Equity (Parenthetical) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Statement of Stockholders' Equity [Abstract]            
Tax effect on net change in pension asset/liability $ 0.1 $ 0.2 $ 0.2   $ 0.0 $ 0.1
Net change in fair value of derivative instruments, tax $ 12.0 $ 8.4 $ 1.3 $ (5.9) $ 10.3 $ 16.2