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Financial instruments - Summary of fair value of financial instruments (Detail) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022 | Jun. 30, 2022
--- | --- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Cash and cash equivalents | $ 9,179 | $ 6,775 | [1] | $ 11,412
Investments in equity shares and funds | 3,574 | 3,298 | [1] |
Fair value |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Cash and cash equivalents | 9,179 | 6,775 |  |
Investments in equity shares and funds | 167 | 222 |  |
Other investments, including loans | 1,474 | 2,275 |  |
Trade and other financial receivables | 2,908 | 2,765 |  |
Derivatives related to net debt | 0 | 2 |  |
Trade and other financial payables | (6,175) | (6,485) |  |
Derivatives related to net debt | (664) | (692) |  |
Fair value | Not Designated As Hedging Instrument |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Forward, option and embedded derivatives contracts | 90 | 67 |  |
Forward, option and embedded derivatives contracts | (27) | (92) |  |
Fair value | Hedging instruments |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Forward, option and embedded derivatives contracts | (104) | (189) |  |
Not held at fair value |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Cash and cash equivalents | 6,724 | 4,050 |  |
Investments in equity shares and funds | 0 | 0 |  |
Other investments, including loans | 42 | 28 |  |
Trade and other financial receivables | 1,653 | 1,441 |  |
Derivatives related to net debt | 0 | 0 |  |
Trade and other financial payables | (6,103) | (6,455) |  |
Derivatives related to net debt | 0 | 0 |  |
Not held at fair value | Not Designated As Hedging Instrument |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Forward, option and embedded derivatives contracts | 0 | 0 |  |
Forward, option and embedded derivatives contracts | 0 | 0 |  |
Not held at fair value | Hedging instruments |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Forward, option and embedded derivatives contracts | 0 | 0 |  |
Level 1 | Fair value |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Cash and cash equivalents | 2,455 | 2,725 |  |
Investments in equity shares and funds | 86 | 147 |  |
Other investments, including loans | 1,232 | 2,018 |  |
Trade and other financial receivables | 13 | 18 |  |
Derivatives related to net debt | 0 | 0 |  |
Trade and other financial payables | 0 | 0 |  |
Derivatives related to net debt | 0 | 0 |  |
Level 1 | Fair value | Not Designated As Hedging Instrument |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Forward, option and embedded derivatives contracts | 0 | 0 |  |
Forward, option and embedded derivatives contracts | 0 | 0 |  |
Level 1 | Fair value | Hedging instruments |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Forward, option and embedded derivatives contracts | 0 | 0 |  |
Level 2 | Fair value |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Cash and cash equivalents | 0 | 0 |  |
Investments in equity shares and funds | 0 | 0 |  |
Other investments, including loans | 0 | 0 |  |
Trade and other financial receivables | 1,242 | 1,306 |  |
Derivatives related to net debt | 0 | 2 |  |
Trade and other financial payables | (72) | (30) |  |
Derivatives related to net debt | (664) | (692) |  |
Level 2 | Fair value | Not Designated As Hedging Instrument |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Forward, option and embedded derivatives contracts | 18 | 16 |  |
Forward, option and embedded derivatives contracts | (12) | (57) |  |
Level 2 | Fair value | Hedging instruments |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Forward, option and embedded derivatives contracts | 0 | 0 |  |
Level 3 | Fair value |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Cash and cash equivalents | 0 | 0 |  |
Investments in equity shares and funds | 81 | 75 |  |
Other investments, including loans | 200 | 229 |  |
Trade and other financial receivables | 0 | 0 |  |
Derivatives related to net debt | 0 | 0 |  |
Trade and other financial payables | 0 | 0 |  |
Derivatives related to net debt | 0 | 0 |  |
Level 3 | Fair value | Not Designated As Hedging Instrument |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Forward, option and embedded derivatives contracts | 72 | 51 |  |
Forward, option and embedded derivatives contracts | (15) | (35) |  |
Level 3 | Fair value | Hedging instruments |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Forward, option and embedded derivatives contracts | $ (104) | $ (189) |  |
[1] | Comparative information has been restated to reflect the adoption of narrow scope amendments to IAS12 'Income Taxes', refer to note 2 for details.

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