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Long-Term Debt - Interest Rate Swaps Additional Information (Details) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Jan. 31, 2019
Apr. 30, 2018
Sep. 29, 2017
Mar. 31, 2017
Derivative [Line Items]            
Reclassification in next 12 months, gross $ 20.9          
Reclassification in next 12 months, net 15.6          
Interest Rate Swap [Member]            
Derivative [Line Items]            
Fixed rate     2.65% 2.61% 1.69%  
Gain (loss) on derivative (48.4) $ 21.9        
Gain recognized in other comprehensive income (loss) $ (36.2) $ 16.4        
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap [Member]            
Derivative [Line Items]            
Notional amount per derivative instrument     $ 300.0 $ 250.0 $ 200.0 $ 200.0
Fixed rate           2.08%
Basis spread on derivative 0.18%