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SUPPLEMENTAL FINANCIAL INFORMATION - Other Non-Current Assets (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
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Supplemental Financial Information [Abstract] |  |
Equity investments (Note 9) | $ 1,706 | $ 1,736
Operating leases | 1,276 | 1,224
Inventories (Note 12) | 1,675 | 1,569
Pension and postretirement | 270 | 234
Research and development | 285 | 336
Receivables and convertible notes | 200 | 452
Other | 524 | 554
Other non-current assets | $ 5,936 | $ 6,105

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