CONTRACT AND OTHER DEFERRED ASSETS, CONTRACT LIABILITIES AND DEFERRED INCOME & PROGRESS COLLECTIONS - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Capitalized Contract Cost [Line Items]
Contract assets (liabilities) and other deferred assets (income), increase net liability position	$ 550
Increase (decrease) in long-term service agreement liabilities	525
Revenue recognized, contract liability	5,884	$ 5,063
Increase in progress collections and deferred income due to timing of revenue recognition	287
Long-term service agreements
Capitalized Contract Cost [Line Items]
Increase (decrease) due to billings	7,147
Net favorable (unfavorable) change in estimated profitability	(296)
Revenues recognized, contract asset	$ 6,865