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Supplement Balance Sheet Information - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Mar. 09, 2020
Business Acquisition [Line Items]      
Amortization expense of intangible assets $ 0.4 $ 0.2  
Discontinued Operations      
Business Acquisition [Line Items]      
Expected credit losses and uncollectible receivables written off $ 4.0 1.0  
Discontinued Operations | Trade names      
Business Acquisition [Line Items]      
Asset impairments   $ 0.2  
CJWS      
Business Acquisition [Line Items]      
Business acquisition, accounts receivable     $ 39.5