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Acquisitions and Divestitures - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 31, 2020
Apr. 01, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Mar. 31, 2019
Business Acquisition [Line Items]            
Payments to acquire business     $ 17.1 $ 0.0 $ 0.0  
Innovative Mattress Solutions, LLC (IMS)            
Business Acquisition [Line Items]            
Transaction value   $ 24.0        
Liabilities assumed           $ 11.0
Consideration transferred   13.2        
Cash and equivalents   5.1        
Payments to acquire business   8.1        
Trade Name and Customer Database | Innovative Mattress Solutions, LLC (IMS)            
Business Acquisition [Line Items]            
Intangible assets acquired   $ 2.1        
Subsequent Event | Sherwood Acquisition Holdings, LLC            
Business Acquisition [Line Items]            
Payments to acquire business $ 40.0          
Voting interest acquired 80.00%