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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 |  |  |

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