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REVENUE - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Disaggregation of Revenue [Line Items]    
Lease & related maintenance and rental revenue $ 936 $ 979
Contract with customer, revenue, remaining performance obligation 2,900  
Maintenance Services    
Disaggregation of Revenue [Line Items]    
Lease & related maintenance and rental revenue $ 243 $ 243