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Our capital and liquidity - Additional information (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Nov. 30, 2024
Disclosure of detailed information about financial instruments [line items] |  |  |
Notional amount | $ 890 | $ 1,050 |
Borrowings | 12,442 | 13,001 |
Liquidity risk |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings | 738 | $ 558 |
Liquidity risk | Bridge Facility November 2024 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Notional amount |  |  | $ 7,000
Liquidity risk | Credit Facility Due November 2028 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings | $ 7,500 |  |
Interest rate risk |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Weighted average maturity period | 11 years | 12 years |
Bottom of range | Liquidity risk |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Percentage of underlying earnings | 40.00% |  |
Top of range | Liquidity risk |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Percentage of underlying earnings | 60.00% |  |

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