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INCOME TAXES - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income Tax Disclosure [Line Items]      
Spin-off of NCR Atleos $ 0 $ 226 $ 0
Valuation allowance against interest expense deduction carryforwards 57 31  
Nondeductible executive compensation (1) 17 9
Valuation allowances 57 31 117
Gains/losses on internal entity restructuring (4) 0 0
Undistributed earnings of foreign subsidiaries 295    
Undistributed foreign earnings 32    
U.S. federal and foreign tax attribute carryforwards 571    
Taxes payable, current 336 31  
Total amount of gross unrecognized tax benefits that would affect NCR's effective tax rate if realized 42    
Recognized interest and penalties expense (benefit) associated with uncertain tax positions 0 4 $ (1)
Interest and penalties accrued associated with uncertain tax positions 16 $ 18  
Minimum      
Income Tax Disclosure [Line Items]      
Significant change in unrecognized tax benefits is reasonably possible, estimated range of change, upper bound 11    
Maximum      
Income Tax Disclosure [Line Items]      
Significant change in unrecognized tax benefits is reasonably possible, estimated range of change, upper bound 14    
Domestic Tax Jurisdiction      
Income Tax Disclosure [Line Items]      
Tax credit carryforward, amount $ 27