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DEBT (Senior Notes Offering) (Details) - USD ($)
Oct. 23, 2020
Sep. 30, 2020
May 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]        
Discount   $ 11,000,000    
Long-term debt   $ 4,573,000,000   $ 4,770,000,000
Senior Notes | 2.80% Senior Notes due June 2031        
Debt Instrument [Line Items]        
Face amount     $ 550,000,000  
Debt instrument, interest rate   2.80% 2.80%  
Discount     $ 1,000,000  
Debt issuance costs     $ 5,000,000  
Long-term debt   $ 549,000,000   0
Senior Notes | 4.70% Senior Notes due April 2021        
Debt Instrument [Line Items]        
Debt instrument, interest rate   4.70%    
Long-term debt   $ 551,000,000   $ 554,000,000
Senior Notes | 4.70% Senior Notes due April 2021 | Subsequent Event | Redemption Notice        
Debt Instrument [Line Items]        
Face amount $ 550,000,000      
Debt instrument, interest rate 4.70%