Summarized financial information for the Company's segments is shown in the following tables. | | | | | | | | | | | | | | | | Three Months Ended September 30, | Nine Months Ended September 30, | | Revenue | 2023 | 2022 | 2023 | 2022 | | Oilfield Services & Equipment | $ | 3,951 | | $ | 3,403 | | $ | 11,405 | | $ | 9,650 | | | Industrial & Energy Technology | 2,691 | | 1,967 | | 7,267 | | 5,601 | | | Total | $ | 6,641 | | $ | 5,369 | | $ | 18,671 | | $ | 15,251 | |
| | | | | | | | | | | | | | | | Three Months Ended September 30, | Nine Months Ended September 30, | | Income before income taxes | 2023 | 2022 | 2023 | 2022 | | Oilfield Services & Equipment | $ | 465 | | $ | 324 | | $ | 1,253 | | $ | 785 | | | Industrial & Energy Technology | 346 | | 282 | | 898 | | 758 | | | Total segment | 811 | | 606 | | 2,151 | | 1,544 | | | Corporate | (95) | | (103) | | (292) | | (316) | | | | | | | Inventory impairment (1) | — | | — | | (33) | | (31) | | | Restructuring, impairment and other | (2) | | (235) | | (161) | | (676) | | | Other non-operating income (loss), net | 94 | | (60) | | 638 | | (657) | | | Interest expense, net | (49) | | (65) | | (171) | | (188) | | Income (loss) before income taxes | $ | 759 | | $ | 144 | | $ | 2,133 | | $ | (323) | |
(1)Charges for inventory impairments are reported in the "Cost of goods sold" caption in the condensed consolidated statements of income (loss). The following table presents depreciation and amortization by segment: | | | | | | | | | | | | | | | | Three Months Ended September 30, | Nine Months Ended September 30, | | Depreciation and amortization | 2023 | 2022 | 2023 | 2022 | | Oilfield Services & Equipment | $ | 206 | | $ | 204 | | $ | 632 | | $ | 647 | | | Industrial & Energy Technology | 57 | | 45 | | 166 | | 144 | | | Total segment | 263 | | 249 | | 798 | | 791 | | | Corporate | 4 | | 5 | | 15 | | 15 | | | Total | $ | 267 | | $ | 254 | | $ | 813 | | $ | 806 | |
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