SUPPLEMENTAL FINANCIAL INFORMATION - Other Non-Current Assets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Supplemental Financial Information [Abstract]
Equity investments	$ 1,699	$ 2,187
Operating leases	1,390	1,220
Inventories	906	484
Pension and postretirement	284	285
Research and development	413	496
Restricted cash	0	54
Receivables and convertible notes	436	0
Other	242	214
Other non-current assets	$ 5,370	$ 4,940

Equity Investments - Noncurrent

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Research and Development, Noncurrent

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Supplemental Financial Information [Abstract]

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Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans.

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Inventories not expected to be converted to cash, sold or exchanged within the normal operating cycle.

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Amount, after allowance for credit loss, of accounts and financing receivables, classified as noncurrent. Includes, but is not limited to, notes and loan receivable.

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Amount of lessee's right to use underlying asset under operating lease.

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Amount of other miscellaneous assets expected to be realized or consumed after one year or normal operating cycle, if longer.

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Amount of noncurrent assets classified as other.

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Amount of cash restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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