BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Millions		3 Months Ended		9 Months Ended	12 Months Ended
	Oct. 02, 2023	Dec. 31, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2023 USD ($)	Apr. 13, 2023 USD ($)	Sep. 15, 2022 company
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of independent companies | company										2
Loss - conflict in Eastern Europe						$ 22
Recovery costs, cyber ransomware					$ 36
Insurance settlements receivable		$ 14			14				$ 19
Proceeds from insurance settlement					5
Out-of-period adjustment to increase operating expenses			$ 10
Fraudulent disbursement, amount		23
Fraudulent disbursements, amount recorded on balance sheet				$ 11		2
Accounts receivable, net of allowances of $32 and $21 as of December 31, 2023 and 2022, respectively		481	$ 1,007	$ 940	481	550		$ 981
Remaining performance obligation		1,600			1,600
Cash, cash equivalents and restricted cash of discontinued operations		0			0	502	$ 463
Interest paid, excluding capitalized interest					365	268	215
Income taxes paid, net					92	56	42
Allowance for credit loss		32			32	21
Credit loss charged to expense					26	15
Allowance for credit loss, writeoff					15	13
Current portion of contract assets		0			0
Contract with customer, liability, revenue recognized					$ 138	152	176
Contract term used to recognize set up fees					5 years
Period of benefit used to amortize set up costs					7 years
Settlement assets		46			$ 46	39
Settlement liabilities		39			39	38
Depreciation					57	57	$ 59
Revision of Prior Period, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating expenses		2
Accounts receivable, net of allowances of $32 and $21 as of December 31, 2023 and 2022, respectively		$ (2)			$ (2)
Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Spinoff | NCR Atleos Corporation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Conversion ratio	0.50
LibertyX
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Business combination, consideration transferred, non-cash						68
Noncash transaction debt assumed						$ 2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Remaining performance obligation, expected timing of satisfaction, period		12 months			12 months
Remaining performance obligation, percentage		0.75%			0.75%
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Software product contract term					1 year
Maximum | Machinery and other equipment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, useful life		20 years			20 years
Maximum | Building
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, useful life		45 years			45 years
Maximum | Software Development Costs, Internal Use
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Capitalized computer software, useful life					7 years
Maximum | Software and Software Development Costs
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Capitalized computer software, useful life					5 years
Maximum | Revenue Benchmark | Bill and Hold Transactions
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage					2.00%	2.00%	2.00%
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Software product contract term					1 month
Minimum | Machinery and other equipment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, useful life		3 years			3 years
Minimum | Building
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, useful life		25 years			25 years
Minimum | Software Development Costs, Internal Use
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Capitalized computer software, useful life					4 years
Minimum | Software and Software Development Costs
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Capitalized computer software, useful life					3 years