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Debt (Details)
1 Months Ended 3 Months Ended 6 Months Ended
May 10, 2024
USD ($)
eligibleGreenProject
Apr. 01, 2024
USD ($)
Aug. 02, 2024
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Line of Credit Facility [Line Items]            
Draws on credit facility         $ 365,000,000 $ 0
Repayments of senior notes         400,000,000 $ 0
5.700% Series K Senior Notes, Due July 2034            
Line of Credit Facility [Line Items]            
Debt interest rate 5.70%          
Face amount of debt $ 600,000,000          
Proceeds from issued debt $ 584,000,000          
Number of eligible green projects to finance and/or refinance (or more) | eligibleGreenProject 1          
Number of days before maturity date before eligible for redemption 90 days          
Redemption price, percent 100.00%          
3.875% Series G Senior Notes, Due April 2024            
Line of Credit Facility [Line Items]            
Repayments of senior notes   $ 400,000,000        
Debt interest rate   3.875%        
Revolving Credit Facility            
Line of Credit Facility [Line Items]            
Net repayments of line of credit $ 215,000,000     $ 300,000,000    
Available capacity       $ 1,500,000,000 $ 1,500,000,000  
Revolving Credit Facility | Subsequent Event            
Line of Credit Facility [Line Items]            
Available capacity     $ 970,000,000      
Draws on credit facility     $ 525,000,000