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Derivatives - Narrative (Details)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2018
agreement
Mar. 31, 2020
USD ($)
financial_institution
Mar. 31, 2019
USD ($)
Other Current Assets      
Derivative [Line Items]      
Estimated fair value of derivative assets     $ 1.8
Other Noncurrent Assets      
Derivative [Line Items]      
Estimated fair value of derivative assets     0.6
Other Current Liabilities      
Derivative [Line Items]      
Estimated fair value of derivative liabilities   $ 18.8  
Estimated fair value of derivative assets     0.9
Other Noncurrent Liabilities      
Derivative [Line Items]      
Estimated fair value of derivative liabilities   $ 37.8  
Estimated fair value of derivative assets     $ 4.3
Cash Flow Hedging | Designated as Hedging Instrument | Forward Starting Floating-To-Fixed Interest Rate Swap      
Derivative [Line Items]      
Number of agreements entered into during period | agreement 8    
Number of financial institutions | financial_institution   6  
Notional amount of interest rate swap   $ 400.0  
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap      
Derivative [Line Items]      
Notional amount of interest rate swap   1,000.0  
Estimated amounts to be reclassified over 12 months   $ 19.4