|**Goodwill And Other Intangible Assets (Tables)**        | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                   
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|**Goodwill and Intangible Assets Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                  
|Schedule of Indefinite and Finite Lived Assets           | Other intangible assets are comprised of the following:June 30, 2022December 31, 2021(in millions)Gross Carrying AmountAccumulated AmortizationNet Carrying AmountGross Carrying AmountAccumulated AmortizationNet Carrying AmountDefinite-lived intangible assets$31.2$(19.2)$12.0$31.2$(19.1)$12.1Indefinite-lived intangible assets340.8336.0Total$352.8$348.1
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|                                                         | June 30, 2022                                                                                                                                                                                                                                                                                                                                                    
|(in millions)                                            | Gross Carrying Amount                                                                                                                                                                                                                                                                                                                                            
|Definite-lived intangible assets                         | $                                                                                                                                                                                                                                                                                                                                                                
|Indefinite-lived intangible assets                       |                                                                                                                                                                                                                                                                                                                                                                  
|Total                                                    |                                                                                                                                                                                                                                                                                                                                                                  

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