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Acquisitions and Dispositions Acquisitions and Dispositions - Dispositions (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 01, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Gain on sale of business   $ 0.0 $ 4.1 $ 0.0
French security services company        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Disposal Date Jan. 01, 2020      
Percent of shares sold 100.00%      
Net sales price $ 11.0      
Gain on sale of business     $ 4.5  
Annual revenues       $ 3.0