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Goodwill and Other Intangibles (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Acquired Finite-Lived Intangible Assets [Line Items]        
Other intangible assets amortization $ 2.2 $ 3.9 $ 4.9 $ 8.2
Other Intangible Assets        
Acquired Finite-Lived Intangible Assets [Line Items]        
Other intangible assets amortization 2.2 3.9 4.9 8.2
Estimated future amortization expense for 2022 6.8   6.8  
Estimated future amortization expense for 2023 9.0   9.0  
Estimated future amortization expense for 2024 8.9   8.9  
Estimated future amortization expense for 2025 8.3   8.3  
Estimated future amortization expense for 2026 7.9   7.9  
Computer Software        
Acquired Finite-Lived Intangible Assets [Line Items]        
Other intangible assets amortization $ 104.4 $ 95.9 $ 205.9 $ 189.9