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Acquisitions Asset Acquisitions (Details) - USD ($)
$ in Millions
Sep. 03, 2019
Oct. 01, 2018
Dec. 31, 2019
Cash consideration   $ 17.1  
Prepaid Royalties     $ 22.0
Breathe [Member]      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets $ 0.2    
Cash consideration $ 127.6