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DEBT - Revolving Credit Facility and Letter of Credit Facility Narrative (Details)
$ in Millions
3 Months Ended 24 Months Ended
Mar. 31, 2024
USD ($)
Mar. 31, 2024
USD ($)
Mar. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Debt Instrument [Line Items]        
Principal amount of debt outstanding $ 11,754 $ 11,754 $ 11,754 $ 11,905
Minimum        
Debt Instrument [Line Items]        
Percentage of unused portion of line of credit commitment   0.50%    
Maximum        
Debt Instrument [Line Items]        
Percentage of unused portion of line of credit commitment   1.25%    
Revolving Credit Facility        
Debt Instrument [Line Items]        
Borrowing capacity increase under line of credit 7,137 $ 7,137 $ 7,137  
Percentage of total commitment under line of credit     0.85  
Percentage of unused portion of line of credit commitment   0.375%    
Revolving Credit Facility | Minimum        
Debt Instrument [Line Items]        
Percentage of line of credit commitment   2.00%    
Revolving Credit Facility | Maximum        
Debt Instrument [Line Items]        
Percentage of line of credit commitment   2.125%    
Revolving Credit Facility | Line of Credit        
Debt Instrument [Line Items]        
Total Aggregate Principal Amount Committed/ Outstanding $ 4,608 $ 4,608 $ 4,608 4,758
Minimum required ratio of total assets to total indebtedness 1.5 1.5 1.5  
Principal amount of debt outstanding $ 1,102 $ 1,102 $ 1,102 1,413
Remaining amount available for borrowing under line of credit $ 3,449 3,449 $ 3,449  
Revolving Credit Facility | Line of Credit | Secured Overnight Financing Rate (SOFR), Credit Spread Adjustment        
Debt Instrument [Line Items]        
Interest rate spread     0.10%  
Revolving Credit Facility | Line of Credit | Base Rate | Minimum        
Debt Instrument [Line Items]        
Interest rate spread     1.75%  
Revolving Credit Facility | Line of Credit | Base Rate | Maximum        
Debt Instrument [Line Items]        
Interest rate spread     1.875%  
Revolving Credit Facility | Line of Credit | Alternate Base Rate | Minimum        
Debt Instrument [Line Items]        
Interest rate spread     0.75%  
Revolving Credit Facility | Line of Credit | Alternate Base Rate | Maximum        
Debt Instrument [Line Items]        
Interest rate spread     0.875%  
Revolving Credit Facility | Line of Credit | Secured Overnight Financing Rate (SOFR)        
Debt Instrument [Line Items]        
Interest rate spread 1.75%      
Revolving Credit Facility | Line of Credit | Revolving Credit Facility        
Debt Instrument [Line Items]        
Total Aggregate Principal Amount Committed/ Outstanding $ 3,506 3,506 $ 3,506  
Revolving Credit Facility | Line of Credit | Letter of Credit        
Debt Instrument [Line Items]        
Total Aggregate Principal Amount Committed/ Outstanding 250 250 250  
Borrowing capacity increase under line of credit 50 50 50  
Principal amount of debt outstanding 57 57 57 $ 60
Letter Of Credit Facility | Line of Credit | Letter of Credit        
Debt Instrument [Line Items]        
Letter of credit facility outstanding $ 56 $ 56 $ 56