Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details) $ in Millions		3 Months Ended		12 Months Ended
	Oct. 02, 2023	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Cyber ransomware incident recovery costs		$ 6		$ 36
Proceeds from insurance settlement, investing activities		8		5
Insurance settlements receivable		17		14
Compensation expense			$ 10
Revenue recognized that was included in contract liabilities		102	$ 84
Remaining performance obligations		1,400
Capitalized software development costs for software sold to customers		487		$ 486
Cumulative fraudulent ACH disbursements		34
Fraudulent ACH disbursements		11
Recovered fraudulent ACH disbursements		$ 12
NCR Atleos Corporation | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Spinoff
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Conversion ratio	0.50
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, expected timing of satisfaction		12 months
Remaining performance obligation, percentage		0.75%