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FINANCIAL INSTRUMENTS - Fair value hierarchy (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
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Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | $ 97,026 | $ 90,512
Total liabilities at fair value | 40,580 | 39,168
Recurring fair value measurement |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 6,461 | 5,071
Total liabilities at fair value | 742 | 374
Recurring fair value measurement | Derivative financial current liabilities |  |
Disclosure of fair value measurement of assets [line items] |  |
Total liabilities at fair value | 679 | 316
Recurring fair value measurement | Derivative financial non-current liabilities |  |
Disclosure of fair value measurement of assets [line items] |  |
Total liabilities at fair value | 63 | 58
Recurring fair value measurement | Investments in equity instruments at FVOCI |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 866 | 1,146
Recurring fair value measurement | Trade accounts receivable and other subject to TSR programs |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 461 | 622
Recurring fair value measurement | Derivative financial current assets |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 3,977 | 2,985
Recurring fair value measurement | Derivative financial non-current assets |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 1,157 | 318
Recurring fair value measurement | Level 1 |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 791 | 1,069
Total liabilities at fair value | 0 | 0
Recurring fair value measurement | Level 1 | Derivative financial current liabilities |  |
Disclosure of fair value measurement of assets [line items] |  |
Total liabilities at fair value | 0 | 0
Recurring fair value measurement | Level 1 | Derivative financial non-current liabilities |  |
Disclosure of fair value measurement of assets [line items] |  |
Total liabilities at fair value | 0 | 0
Recurring fair value measurement | Level 1 | Investments in equity instruments at FVOCI |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 791 | 1,069
Recurring fair value measurement | Level 1 | Trade accounts receivable and other subject to TSR programs |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 0 | 0
Recurring fair value measurement | Level 1 | Derivative financial current assets |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 0 | 0
Recurring fair value measurement | Level 1 | Derivative financial non-current assets |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 0 | 0
Recurring fair value measurement | Level 2 |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 5,129 | 3,288
Total liabilities at fair value | 742 | 374
Recurring fair value measurement | Level 2 | Derivative financial current liabilities |  |
Disclosure of fair value measurement of assets [line items] |  |
Total liabilities at fair value | 679 | 316
Recurring fair value measurement | Level 2 | Derivative financial non-current liabilities |  |
Disclosure of fair value measurement of assets [line items] |  |
Total liabilities at fair value | 63 | 58
Recurring fair value measurement | Level 2 | Investments in equity instruments at FVOCI |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 0 | 0
Recurring fair value measurement | Level 2 | Trade accounts receivable and other subject to TSR programs |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 0 | 0
Recurring fair value measurement | Level 2 | Derivative financial current assets |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 3,977 | 2,985
Recurring fair value measurement | Level 2 | Derivative financial non-current assets |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 1,152 | 303
Recurring fair value measurement | Level 3 |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 541 | 714
Total liabilities at fair value | 0 | 0
Recurring fair value measurement | Level 3 | Derivative financial current liabilities |  |
Disclosure of fair value measurement of assets [line items] |  |
Total liabilities at fair value | 0 | 0
Recurring fair value measurement | Level 3 | Derivative financial non-current liabilities |  |
Disclosure of fair value measurement of assets [line items] |  |
Total liabilities at fair value | 0 | 0
Recurring fair value measurement | Level 3 | Investments in equity instruments at FVOCI |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 75 | 77
Recurring fair value measurement | Level 3 | Trade accounts receivable and other subject to TSR programs |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 461 | 622
Recurring fair value measurement | Level 3 | Derivative financial current assets |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | 0 | 0
Recurring fair value measurement | Level 3 | Derivative financial non-current assets |  |
Disclosure of fair value measurement of assets [line items] |  |
Total assets at fair value | $ 5 | $ 15

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