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Equity - Schedule of Accumulated Other Comprehensive Loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss), net of tax, beginning $ 2,984.2 $ 2,561.4 $ 3,210.4
Other comprehensive income (loss), net of tax (34.0) 130.1 (92.3)
Accumulated other comprehensive income (loss), net of tax, ending 3,051.9 2,984.2 2,561.4
Cumulative Effect, Period of Adoption, Adjustment      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss), net of tax, beginning     2.4
Foreign currency adjustments      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss), net of tax, beginning 24.0 (77.7) (101.5)
Other comprehensive income (loss) before reclassifications (86.5) 101.7 (15.2)
Amounts reclassified from accumulated other comprehensive income (loss) 0.0 0.0 0.0
Other comprehensive income (loss), net of tax     (15.2)
Accumulated other comprehensive income (loss), net of tax, ending (62.5) 24.0 (77.7)
Foreign currency adjustments | Cumulative Effect, Period of Adoption, Adjustment      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss), net of tax, beginning   0.0  
Accumulated other comprehensive income (loss), net of tax, ending     0.0
Derivative Instruments      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss), net of tax, beginning (71.8) (65.0) 11.2
Other comprehensive income (loss) before reclassifications 44.1 (2.5) (69.0)
Amounts reclassified from accumulated other comprehensive income (loss) 5.5 (4.3) (8.2)
Other comprehensive income (loss), net of tax     (77.2)
Accumulated other comprehensive income (loss), net of tax, ending (22.2) (71.8) (65.0)
Derivative Instruments | Cumulative Effect, Period of Adoption, Adjustment      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss), net of tax, beginning   1.0  
Accumulated other comprehensive income (loss), net of tax, ending     1.0
Pension and other postretirement benefits      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss), net of tax, beginning (234.4) (269.3) (218.6)
Other comprehensive income (loss) before reclassifications (14.5) 18.9 (6.5)
Amounts reclassified from accumulated other comprehensive income (loss) 17.9 16.0 9.9
Other comprehensive income (loss), net of tax     3.4
Accumulated other comprehensive income (loss), net of tax, ending (231.0) (234.4) (269.3)
Pension and other postretirement benefits | Cumulative Effect, Period of Adoption, Adjustment      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss), net of tax, beginning   (54.1)  
Accumulated other comprehensive income (loss), net of tax, ending     (54.1)
Total      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss), net of tax, beginning (282.2) (412.0) (308.9)
Other comprehensive income (loss) before reclassifications (56.9) 118.1 (90.7)
Amounts reclassified from accumulated other comprehensive income (loss) 23.4 11.7 1.7
Other comprehensive income (loss), net of tax     (89.0)
Accumulated other comprehensive income (loss), net of tax, ending $ (315.7) (282.2) (412.0)
Total | Cumulative Effect, Period of Adoption, Adjustment      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss), net of tax, beginning   $ (53.1) (53.1)
Accumulated other comprehensive income (loss), net of tax, ending     (53.1)
Discontinued Operations | Foreign currency adjustments      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive income (loss), net of tax     39.0
Discontinued Operations | Derivative Instruments      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive income (loss), net of tax     0.0
Discontinued Operations | Pension and other postretirement benefits      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive income (loss), net of tax     0.0
Discontinued Operations | Total      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive income (loss), net of tax     $ 39.0