REVENUE - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Disaggregation of Revenue [Line Items]
Maintenance revenue	$ 976	$ 960	$ 2,887	$ 2,844
Contract with customer, revenue, remaining performance obligation	3,300		3,300		$ 3,100
Maintenance Services
Disaggregation of Revenue [Line Items]
Maintenance revenue	$ 250	$ 242	$ 749	$ 726