XML 85 R74.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
DEBT - Second Amended and Restated Credit Facility (Details) - Revolving credit facility - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Line of Credit Facility [Line Items]    
Maximum borrowing capacity $ 2,000,000,000.0  
Outstanding borrowings 13,000,000 $ 1,490,000,000
Remaining borrowing capacity $ 1,990,000,000  
Maximum    
Line of Credit Facility [Line Items]    
Debt covenant, total net debt to capitalization ratio 65.00%  
Debt covenant, debt principal amount as percentage of net tangible assets 15.00%  
Federal Funds Rate    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 0.50%  
LIBOR    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 1.00%  
Investment Grade Annually | Minimum    
Line of Credit Facility [Line Items]    
Quarterly commitment fee percentage based on unused portion of borrowing base 0.125%  
Investment Grade Annually | Maximum    
Line of Credit Facility [Line Items]    
Quarterly commitment fee percentage based on unused portion of borrowing base 0.35%  
Investment Grade Annually | Base Rate | Minimum    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 0.125%  
Investment Grade Annually | Base Rate | Maximum    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 1.00%  
Investment Grade Annually | LIBOR | Minimum    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 1.125%  
Investment Grade Annually | LIBOR | Maximum    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 2.00%