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Business Segment Information - Summary of Business Segment Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of operating segments [line items] |  |  |
Revenues | $ 17,311 | $ 18,757 | $ 13,682
Revenues from intersegment sales |  |  | 0
Revenues | 17,311 | 18,757 | 13,682
Operating profit or loss | (1,248) | 2,482 | 699
Income from equity interests in associates and joint ventures | 94 | 446 | 287
Net financial results | 897 | 128 | (271)
Net profit / (loss) before income tax | (257) | 3,056 | 715
Income tax | (1,020) | (822) | (699)
Net profit/ (loss) | (1,277) | 2,234 | 16
Acquisitions of property, plant and equipment | 6,191 | 4,459 | 2,666
Acquisitions of right-of-use assets | 404 | 306 | 284
Assets | 25,035 | 25,912 | 23,290
Depreciation of property, plant and equipment | 3,016 | 2,551 | 2,816
Amortization of intangible assets | 37 | 43 | 51
Depreciation of right-of-use assets | 220 | 214 | 201
Impairment of property, plant and equipment and intangible assets | 2,288 | 123 | 115
Operating segments [member] | Upstream [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues | 171 | 174 | 147
Revenues from intersegment sales | 7,211 | 7,134 | 5,820
Revenues | 7,382 | 7,308 | 5,967
Operating profit or loss | (1,927) | 1,310 | 80
Acquisitions of property, plant and equipment | 4,773 | 3,417 | 2,168
Acquisitions of right-of-use assets | 363 | 204 | 172
Assets | 11,129 | 11,528 | 10,681
Depreciation of property, plant and equipment | 2,452 | 1,947 | 2,259
Amortization of intangible assets |  |  | 0
Depreciation of right-of-use assets | 131 | 140 | 129
Impairment of property, plant and equipment and intangible assets | 2,288 | 123 | 115
Operating segments [member] | Downstream [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues | 14,888 | 16,016 | 11,220
Revenues from intersegment sales | 100 | 109 | 64
Revenues | 14,988 | 16,125 | 11,284
Operating profit or loss | 896 | 1,523 | 945
Income from equity interests in associates and joint ventures | 10 | 23 | 48
Acquisitions of property, plant and equipment | 1,140 | 837 | 406
Acquisitions of right-of-use assets | 19 | 102 | 105
Assets | 9,916 | 9,530 | 8,321
Depreciation of property, plant and equipment | 464 | 477 | 456
Amortization of intangible assets | 30 | 29 | 39
Depreciation of right-of-use assets | 71 | 59 | 61
Operating segments [member] | Gas and power segment [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues | 2,017 | 2,304 | 2,069
Revenues from intersegment sales | 357 | 391 | 161
Revenues | 2,374 | 2,695 | 2,230
Operating profit or loss | (3) | 90 | 10
Income from equity interests in associates and joint ventures | 84 | 428 | 239
Acquisitions of property, plant and equipment | 178 | 78 | 27
Acquisitions of right-of-use assets | 22 | 0 | 7
Assets | 2,282 | 3,215 | 2,846
Depreciation of property, plant and equipment | 44 | 48 | 28
Amortization of intangible assets | 7 | 12 | 8
Depreciation of right-of-use assets | 19 | 20 | 17
Operating segments [member] | Central Administration and Others [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues | 235 | 263 | 246
Revenues from intersegment sales | 781 | 779 | 484
Revenues | 1,016 | 1,042 | 730
Operating profit or loss | (270) | (405) | (198)
Income from equity interests in associates and joint ventures | 0 | (5) |
Acquisitions of property, plant and equipment | 100 | 127 | 65
Assets | 1,826 | 1,807 | 1,575
Depreciation of property, plant and equipment | 56 | 79 | 73
Amortization of intangible assets | 0 | 2 | 4
Consolidation Adjustments [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues from intersegment sales | (8,449) | (8,413) | (6,529)
Revenues | (8,449) | (8,413) | (6,529)
Operating profit or loss | 56 | (36) | (138)
Assets | (118) | (168) | (133)
Depreciation of right-of-use assets | $ (1) | $ (5) | $ (6)

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