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LONG-TERM DEBT - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2019
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jun. 30, 2019
Debt Instrument [Line Items]            
Maximum aggregate borrowings under credit facility (up to)           $ 4,500
Cash paid for interest, net of amounts capitalized     $ 348 $ 290 $ 234  
Senior Notes | Series DD Notes            
Debt Instrument [Line Items]            
Senior notes, face amount $ 550   $ 550      
Senior notes, interest rate 2.125%   2.125%      
Net proceeds $ 545          
Senior Notes | Series BB Notes            
Debt Instrument [Line Items]            
Senior notes, face amount 300 $ 300 $ 300      
Senior Notes | Series CC Notes            
Debt Instrument [Line Items]            
Senior notes, face amount $ 550 $ 550 $ 550      
Senior notes, interest rate 3.60% 3.60% 3.60%      
Senior Notes | Series BB and Series CC Notes            
Debt Instrument [Line Items]            
Net proceeds   $ 841        
LIBOR | Senior Notes | Series BB Notes            
Debt Instrument [Line Items]            
Variable interest rate   0.65%        
Interest Rate Swap | LIBOR | Senior Notes | Series DD Notes            
Debt Instrument [Line Items]            
Variable interest rate 0.754%   0.754%      
Interest Rate Swap | LIBOR | Senior Notes | Series CC Notes            
Debt Instrument [Line Items]            
Variable interest rate   1.1205%