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SENIOR NOTES PAYABLE - Narrative (Details) - Senior Notes - USD ($)
1 Months Ended 3 Months Ended
May 03, 2021
Apr. 30, 2021
Jun. 30, 2021
Mar. 31, 2020
Jul. 31, 2016
Mar. 31, 2012
Forecast            
Debt Instrument [Line Items]            
Gain (loss) on extinguishment of debt     $ (97,000,000)      
Senior Notes Due 2024            
Debt Instrument [Line Items]            
Debt Instrument, face amount           $ 250,000,000
Stated interest rate           5.625%
Senior Notes Due 2026            
Debt Instrument [Line Items]            
Debt Instrument, face amount         $ 500,000,000  
Stated interest rate         3.625%  
Senior Notes Due 2030            
Debt Instrument [Line Items]            
Debt Instrument, face amount       $ 500,000,000    
Stated interest rate       4.65%    
Percentage of principal amount of notes redeemed       100.00%    
Basis spread used in determining redemption price       0.50%    
Senior Notes Due 2046            
Debt Instrument [Line Items]            
Debt Instrument, face amount         $ 300,000,000  
Stated interest rate         4.95%  
Percentage of principal amount of notes redeemed         100.00%  
Basis spread used in determining redemption price         0.45%  
Senior Notes Due 2046, Additional            
Debt Instrument [Line Items]            
Debt Instrument, face amount         $ 500,000,000  
Senior Notes Due 2051 | Subsequent Event            
Debt Instrument [Line Items]            
Debt Instrument, face amount   $ 750,000,000        
Stated interest rate   3.75%        
Percentage of principal amount of notes redeemed   100.00%        
Basis spread used in determining redemption price   0.20%        
Existing Notes | Subsequent Event            
Debt Instrument [Line Items]            
Repurchased face amount $ 418,000,000 $ 332,000,000        
Repayments of senior debt $ 473,000,000 $ 373,000,000