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Interest Bearing Liabilities and Financing Facilities - Additional Information (Detail) SFr in Millions, $ in Millions |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jan. 17, 2020 USD ($) | Aug. 28, 2015 USD ($) Note | Jun. 24, 2008 USD ($) | Dec. 31, 2022 USD ($) Loan | Dec. 31, 2021 USD ($) Loan | Dec. 31, 2020 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2022 CHF (SFr) Loan
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Borrowings |  |  |  | $ 5,138 | $ 5,430 | $ 6,214 |  |
Borrowings repaid |  |  |  | 283 | 784 | 83 |  |
Syndicated facility [member] | Tranche one [Member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Borrowings |  |  |  | $ 800 |  |  |  |
Borrowings maturity |  |  |  | October 2024 |  |  |  |
Syndicated facility [member] | Tranche two [member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Borrowings |  |  |  | $ 600 |  |  |  |
Borrowings maturity |  |  |  | July 2025 |  |  |  |
Syndicated facility [member] | Tranche three [member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Borrowings |  |  |  | $ 600 |  |  |  |
Borrowings maturity |  |  |  | 12 July 2027 |  |  |  |
JBIC facility [member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Borrowings |  |  |  | $ 83 | 166 | 250 |  |
Borrowings repaid |  |  |  | $ 83 | $ 84 |  |  |
Receivables percentage in favour of lenders |  |  | 90.00% |  |  |  |  |
Reserve amount for receivables of lenders |  |  | $ 30 |  |  |  |  |
JBIC facility [member] | Tranche one [Member] | Loan commitments [member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Borrowings |  |  | $ 1,000 |  |  |  |  |
Borrowings interest rate basis |  |  | Interest is payable semi-annually in arrears and the principal amortises on a straight-line basis, with equal instalments of principal due on each interest payment date (every six months). |  |  |  |  |
JBIC facility [member] | Tranche two [member] | Loan commitments [member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Borrowings |  |  | $ 500 |  |  |  |  |
Borrowings repaid |  |  |  |  |  |  | $ 500 |
Bilateral facilities [member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Number of borrowing facilities | Loan |  |  |  | 14 | 14 |  |  | 14
Loan facilities amount |  |  |  | $ 2,050 | $ 1,900 |  |  |
Borrowings |  |  |  | $ (5) | (4) | (4) |  |
Bilateral facilities [member] | Tranche one [Member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Number of borrowing facilities | Loan |  |  |  | 1 |  |  |  | 1
Bilateral facilities [member] | Tranche two [member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Number of borrowing facilities | Loan |  |  |  | 5 |  |  |  | 5
Bilateral facilities [member] | Tranche three [member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Number of borrowing facilities | Loan |  |  |  | 4 |  |  |  | 4
New syndicated facility [member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Borrowings | $ 600 |  |  |  |  |  |  |
Borrowings maturity | seven years |  |  |  |  |  |  |
Borrowings interest rate | 1.20% |  |  |  |  |  |  |
Borrowings interest rate basis | LIBOR |  |  |  |  |  |  |
Unsecured bonds [member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Financial liabilities carrying amount |  |  |  | $ 4,084 | 4,081 |  |  |
Financial liabilities at fair value |  |  |  | 3,852 | 4,443 |  |  |
Medium Term Notes [member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Financial liabilities carrying amount |  |  |  | 385 | 592 |  |  | SFr 175
Financial liabilities at fair value |  |  |  | 372 | 604 |  |  |
Borrowings |  |  |  | 385 | 592 | 597 |  |
Borrowings repaid |  |  |  | 200 |  |  |  |
Global medium term notes [member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Borrowings |  | $ 3,000 |  |  |  |  |  |
Number of notes issued | Note |  | 2 |  |  |  |  |  |
US Bonds [member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Borrowings |  |  |  | 4,084 | 4,081 | $ 4,778 |  |
Borrowings interest rate basis |  | Interest on the bonds is payable semi-annually in arrears |  |  |  |  |  |
Borrowings repaid |  |  |  |  | 700 |  |  |
US Bonds [member] | JBIC facility [member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Borrowings repaid |  | $ 83 |  |  |  |  |  |
US Bonds [member] | Yucho 2022 median term note [member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Borrowings repaid |  | $ 200 |  |  |  |  |  |
Borrowings [member] | Syndicated facility [member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Current line of credit facility |  |  |  | 2,000 |  |  |  |
Fair value hedges [member] |  |  |  |  |  |  |  |
Interest bearing liabilities and financing facilities [line items] |  |  |  |  |  |  |  |
Gain on changes in fair value risks of the hedged item |  |  |  | 7 | 5 |  |  |
Loss on changes in fair value risks of the hedged instrument |  |  |  | $ 7 | $ 7 |  |  |

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