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Acquisitions (Narrative) (Details) - USD ($)
$ in Millions
Jan. 31, 2020
Apr. 01, 2019
Mar. 31, 2019
Sherwood Bedding      
Business Acquisition [Line Items]      
Percentage of voting interests acquired 80.00%    
Consideration transferred $ 39.1    
Cash and equivalents $ 1.2    
Innovative Mattress Solutions, LLC (IMS)      
Business Acquisition [Line Items]      
Consideration transferred   $ 13.2  
Cash and equivalents   5.1  
Transaction value   $ 24.0  
Liabilities     $ 11.0