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Fair Values of Net Assets Acquired (Details) - USD ($)
$ in Millions
Mar. 31, 2019
Dec. 31, 2018
Mar. 08, 2018
Business Acquisition [Line Items]      
Goodwill $ 1,992.9 $ 1,992.9  
Passport Food Safety Solutions, Inc.      
Business Acquisition [Line Items]      
Inventory and other working capital     $ 3.3
Long-term assets     1.0
Trade names and other intangibles     28.5
Goodwill     32.5
Current liabilities     (1.1)
Long-term liabilities     (7.1)
Contingent consideration $ (7.3)   (7.3)
Cash purchase price (net of cash acquired)     $ 49.8