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New Accounting Pronouncements - Impact of 842 Adoption (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Other assets $ 605.9 $ 685.4 $ 657.7
Accrued expenses 220.4 191.6 183.7
Other long-term liabilities $ 747.3 837.1 $ 817.3
Accounting Standards Update 2016-02      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Other assets   27.7  
Accrued expenses   7.9  
Other long-term liabilities   $ 19.8