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Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Statement of Comprehensive Income [Abstract]      
Net income $ 133.0 $ 93.1 $ 28.7
Changes in cumulative translation adjustment, net of tax of $5.5 million, $2.0 million and $3.9 million, respectively (29.2) (20.2) 23.7
Amortization of prior service cost/(credit), net of tax of $(0.1) million, $(0.1) million and $0.1 million, respectively 0.4 0.2 (0.4)
Amortization of actuarial net losses, net of tax of $(0.1) million, $(0.4) million and $(0.2) million, respectively 0.4 2.2 1.5
Actuarial net gains/(losses) arising during the year, net of tax of $24.0 million, $(9.0) million and $1.9 million, respectively (69.9) 28.2 (7.7)
Total comprehensive income $ 34.7 $ 103.5 $ 45.8