Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Components of AOCI and Related Tax Effect (Details)

v3.20.4
Stockholders' Equity - Components of AOCI and Related Tax Effect (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive income (loss) $ 15.4 $ (13.1) $ 3.5
Foreign currency translation adjustments      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Pre-tax Amount 7.2 (2.2) (6.0)
Tax Impact 0.0 0.0 0.0
Other comprehensive income (loss) 7.2 (2.2) (6.0)
Derivative gain (loss), net      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Pre-tax Amount (0.6) (1.5) 2.3
Tax Impact 0.2 0.1 (0.6)
Other comprehensive income (loss) (0.4) (1.4) 1.7
Pension and postretirement adjustments      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Pre-tax Amount 11.5 (9.5) 8.5
Tax Impact (2.9) 0.0 (0.7)
Other comprehensive income (loss) 8.6 (9.5) 7.8
Accumulated other comprehensive (loss) income      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Pre-tax Amount 18.1 (13.2) 4.8
Tax Impact (2.7) 0.1 (1.3)
Other comprehensive income (loss) $ 15.4 $ (13.1) $ 3.5