ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			$ 931,000,000
Amounts reclassified from AOCI	$ 0	$ 0	0	$ 0
Other comprehensive income (loss)	(7,000,000)	$ 8,000,000	7,000,000	$ (32,000,000)
Ending balance	848,000,000		848,000,000
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(469,000,000)
Other comprehensive income (loss) before reclassifications			7,000,000
Amounts reclassified from AOCI			0
Other comprehensive income (loss)			7,000,000
Spin-Off of NCR Atleos			16,000,000
Ending balance	(446,000,000)		(446,000,000)
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			7,000,000
Amounts reclassified from AOCI			0
Other comprehensive income (loss)			7,000,000
Spin-Off of NCR Atleos			16,000,000
Ending balance	(445,000,000)		(445,000,000)
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)		(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		$ 0