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DEBT - Term Note (Details) - Term note - USD ($)
1 Months Ended 2 Months Ended 3 Months Ended
Nov. 30, 2018
Dec. 31, 2018
Mar. 31, 2019
Short-term Debt [Line Items]      
Face amount $ 1,000,000,000    
Debt instrument term 1 year    
Interest rate in effect (percent)     3.65%
Repayments of short-term debt   $ 350,000,000  
LIBOR      
Short-term Debt [Line Items]      
Basis spread on variable rate     1.15%
LIBOR | Minimum      
Short-term Debt [Line Items]      
Basis spread on variable rate     1.00%
Federal Funds Rate | Minimum      
Short-term Debt [Line Items]      
Basis spread on variable rate     0.50%