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Recently Adopted and Issued Accounting Standards (Details) - USD ($)
$ in Millions
Mar. 31, 2019
Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Present value of lease liabilities $ 78.4  
ASU 2018-02    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Tax Cuts And Jobs Act Of 2017, tax effect, reclassification from Accumulated Other Comprehensive Loss to retained earnings, tax effect   $ 13.4
ASU 2016-02    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Present value of lease liabilities 78.4  
Operating lease right-of-use assets $ 78.4