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SUPPLEMENTAL FINANCIAL INFORMATION - Other Non-Current Assets (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
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Supplemental Financial Information [Abstract] |  |
Equity investments (Note 9) | $ 1,686 | $ 1,736
Operating leases | 1,215 | 1,224
Inventories (Note 12) | 1,679 | 1,569
Pension and postretirement | 248 | 234
Research and development | 316 | 336
Receivables and convertible notes | 220 | 452
Other | 502 | 554
Other non-current assets | $ 5,866 | $ 6,105

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