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Financial assets and liabilities - Summary of Sensitivity Analysis on Changes in Foreign Exchange Rates (Detail) | 12 Months Ended
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Dec. 31, 2021
Dollar (USD) [member] |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis | 5.5805%
Euro Member Countries, Euro |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis | 6.321%
United Kingdom, Pounds |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis | 7.5242%
Probable [member] | Dollar (USD) [member] |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis, scenario | 5.70%
Probable [member] | Euro Member Countries, Euro |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis, scenario | 6.555%
Probable [member] | United Kingdom, Pounds |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis, scenario | 7.923%
25% [member] | Dollar (USD) [member] |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis, scenario | 7.125%
25% [member] | Euro Member Countries, Euro |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis, scenario | 8.1938%
25% [member] | United Kingdom, Pounds |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis, scenario | 9.9038%
50% [member] | Dollar (USD) [member] |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis, scenario | 8.55%
50% [member] | Euro Member Countries, Euro |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis, scenario | 9.8325%
50% [member] | United Kingdom, Pounds |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis, scenario | 11.8845%
-25% [member] | Dollar (USD) [member] |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis, scenario | 4.275%
-25% [member] | Euro Member Countries, Euro |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis, scenario | 4.9163%
-25% [member] | United Kingdom, Pounds |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis, scenario | 5.9423%
-50% [member] | Dollar (USD) [member] |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis, scenario | 2.85%
-50% [member] | Euro Member Countries, Euro |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis, scenario | 3.2775%
-50% [member] | United Kingdom, Pounds |
Disclosure foreign currency sensitivity analysis [line items] |
Exchange rate sensitivity analysis, scenario | 3.9615%

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