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Summary of Significant Accounting Policies Property and Equipment (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]      
Depreciation $ 27.2 $ 26.9 $ 26.8
Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful lives of the assets 2 years    
Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful lives of the assets 27 years