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Segmental information - additional information - Disclosure of sales revenue by destination (Detail) - USD ($) $ in Millions | 6 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023
Disclosure of geographical areas [line items] |  |
Sales revenue by destination (as a percent) | 100.00% | 100.00%
Consolidated sales revenue | $ 26,802 | $ 26,667
Greater China |  |
Disclosure of geographical areas [line items] |  |
Sales revenue by destination (as a percent) | 58.10% | 58.10%
Consolidated sales revenue | $ 15,569 | $ 15,482
United States of America |  |
Disclosure of geographical areas [line items] |  |
Sales revenue by destination (as a percent) | 16.00% | 14.60%
Consolidated sales revenue | $ 4,288 | $ 3,885
Asia (excluding Greater China and Japan) |  |
Disclosure of geographical areas [line items] |  |
Sales revenue by destination (as a percent) | 6.90% | 7.30%
Consolidated sales revenue | $ 1,834 | $ 1,957
Japan |  |
Disclosure of geographical areas [line items] |  |
Sales revenue by destination (as a percent) | 6.60% | 6.70%
Consolidated sales revenue | $ 1,769 | $ 1,791
Europe (excluding UK) |  |
Disclosure of geographical areas [line items] |  |
Sales revenue by destination (as a percent) | 5.10% | 5.80%
Consolidated sales revenue | $ 1,373 | $ 1,537
Canada |  |
Disclosure of geographical areas [line items] |  |
Sales revenue by destination (as a percent) | 3.00% | 2.90%
Consolidated sales revenue | $ 800 | $ 785
Australia |  |
Disclosure of geographical areas [line items] |  |
Sales revenue by destination (as a percent) | 1.80% | 1.70%
Consolidated sales revenue | $ 489 | $ 451
UK |  |
Disclosure of geographical areas [line items] |  |
Sales revenue by destination (as a percent) | 0.20% | 0.20%
Consolidated sales revenue | $ 64 | $ 66
Other countries |  |
Disclosure of geographical areas [line items] |  |
Sales revenue by destination (as a percent) | 2.30% | 2.70%
Consolidated sales revenue | $ 616 | $ 713

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