Accumulated Other Comprehensive Income (Loss) - Changes in AOCI by Component (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 931,000,000
Amounts reclassified from AOCI	0	$ 0
Other comprehensive income (loss)	4,000,000	(23,000,000)
Spin-Off of NCR Atleos	0	$ 2,000,000
Ending balance	857,000,000
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(469,000,000)
Other comprehensive income (loss) before reclassifications	4,000,000
Amounts reclassified from AOCI	0
Other comprehensive income (loss)	4,000,000
Spin-Off of NCR Atleos	16,000,000
Ending balance	(449,000,000)
Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(468,000,000)
Other comprehensive income (loss) before reclassifications	4,000,000
Amounts reclassified from AOCI	0
Other comprehensive income (loss)	4,000,000
Spin-Off of NCR Atleos	16,000,000
Ending balance	(448,000,000)
Changes in Employee Benefit Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(1,000,000)
Other comprehensive income (loss) before reclassifications	0
Amounts reclassified from AOCI	0
Other comprehensive income (loss)	0
Spin-Off of NCR Atleos	0
Ending balance	(1,000,000)
Changes in Fair Value of Effective Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	0
Other comprehensive income (loss) before reclassifications	0
Amounts reclassified from AOCI	0
Other comprehensive income (loss)	0
Spin-Off of NCR Atleos	0
Ending balance	$ 0