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 |