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Acquisitions - Weighted Average Remaining Life of Other Intangible Assets (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]      
Goodwill, period increase (decrease) $ 1.0 $ (0.1) $ 0.0
Business Acquisition | Customer lists and contracts      
Acquired Finite-Lived Intangible Assets [Line Items]      
Weighted average remaining life of other intangible assets 22 years    
Business Acquisition | Noncompete      
Acquired Finite-Lived Intangible Assets [Line Items]      
Weighted average remaining life of other intangible assets 5 years