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Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement of Comprehensive Income [Abstract]      
Net income $ 101.9 $ 62.0 $ 106.8
Other comprehensive income (loss), net of tax:      
Unrealized income (loss) on derivative instruments, net of tax (expense) benefit of $(3.0), $1.1 and $0.9, respectively 7.1 (2.9) (2.3)
Foreign currency translation adjustments, net of tax expense of $(2.3), $(3.3) and $(1.3), respectively (23.4) (19.3) (0.3)
Recognition of deferred pension and other post-retirement items, net of tax (expense) benefit of $(12.3), $10.5 and $13.6, respectively 45.0 (36.3) (41.4)
Other comprehensive loss, net of tax 28.7 (58.5) (44.0)
Comprehensive income $ 130.6 $ 3.5 $ 62.8