XML 110 R94.htm IDEA: XBRL DOCUMENT v3.10.0.1
Subsequent Events - Narrative (Details)
$ in Millions
Jan. 22, 2019
USD ($)
derivative
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Subsequent Event [Line Items]      
Notional amount of derivative   $ 10,735.4 $ 9,038.2
Subsequent Event      
Subsequent Event [Line Items]      
Number of cash flow hedges entered into | derivative 3    
Cash Flow Hedge 1 | Subsequent Event      
Subsequent Event [Line Items]      
Notional amount of derivative $ 1,000.0    
Derivative instrument stated interest rate 2.56%    
Cash Flow Hedge 2 | Subsequent Event      
Subsequent Event [Line Items]      
Notional amount of derivative $ 500.0    
Derivative instrument stated interest rate 2.56%    
Cash Flow Hedge 3 | Subsequent Event      
Subsequent Event [Line Items]      
Notional amount of derivative $ 500.0    
Derivative instrument stated interest rate 2.55%    
Variable Rate Debt | Subsequent Event      
Subsequent Event [Line Items]      
Long-term debt $ 2,000.0