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Restructuring Expenses and Impairment Charges (Narrative) (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2019
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]          
Controlling interest ownership percentage   50.00%      
Proceeds from divestiture of interest in joint venture   $ 5.1      
Restructuring expenses     $ 11.9 $ 6.9 $ 20.1
Provision reversal       (0.8) (4.8)
Asset Impairment Charges     4.1 36.0 0.0
Net Income (Loss) Attributable to Noncontrolling Interest     0.1 14.9 (4.5)
Write-down of investment     (68.2) (64.1) (65.6)
Russian Finance Joint Venture          
Restructuring Cost and Reserve [Line Items]          
Write-down of investment $ 4.8     4.8  
Entity Under Time-Limited General License | Russian Finance Joint Venture          
Restructuring Cost and Reserve [Line Items]          
Asset Impairment Charges 36.0        
Net Income (Loss) Attributable to Noncontrolling Interest $ 12.2        
Loss on sale of Joint Venture          
Restructuring Cost and Reserve [Line Items]          
Restructuring expenses   $ 2.1 $ 0.0 0.0 0.0
Provision reversal       $ 0.0 (2.5)
Gain on Sale of Joint Venture          
Restructuring Cost and Reserve [Line Items]          
Provision reversal         $ 2.5