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v3.25.3

Debt and lines of credit - Additional Information (Details) | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
May 31, 2025 USD ($) series | Mar. 31, 2025 USD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |
Commercial paper |  |  | $ 0 |  | $ 0 |
Proceeds from issuance of long-term debt |  |  |  |  | 1,199,000,000 | $ 2,980,000,000
Repayment of debt |  |  |  |  | 750,000,000 | 300,000,000
Interest and debt expense |  |  | 141,000,000 | $ 131,000,000 | 402,000,000 | 378,000,000
Interest costs capitalized |  |  | $ 3,000,000 | $ 5,000,000 | $ 9,000,000 | $ 16,000,000
Senior unsecured notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Number of series of debt issued | series | 2 |  |  |  |  |
Principal amount | $ 1,200,000,000 |  |  |  |  |
Debt issuance costs | 6,000,000 |  |  |  |  |
Proceeds from issuance of long-term debt | 1,200,000,000 |  |  |  |  |
Notes due 2030 at 4.50% |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt stated interest rate (in percentage) |  |  | 4.50% |  | 4.50% |
Notes due 2030 at 4.50% | Senior unsecured notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal amount | $ 550,000,000 |  |  |  |  |
Long-term debt stated interest rate (in percentage) | 4.50% |  |  |  |  |
Notes due 2035 at 5.10% |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt stated interest rate (in percentage) |  |  | 5.10% |  | 5.10% |
Notes due 2035 at 5.10% | Senior unsecured notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal amount | $ 650,000,000 |  |  |  |  |
Long-term debt stated interest rate (in percentage) | 5.10% |  |  |  |  |
Notes due 2025 at 1.375% |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt stated interest rate (in percentage) |  |  | 1.375% |  | 1.375% |
Repayment of debt |  | $ 750,000,000 |  |  |  |
Revolving credit facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  | $ 1,000,000,000 |  | $ 1,000,000,000 |

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