Accumulated Other Comprehensive Income (Loss) - Reclassifications Out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Selling, general and administrative expenses	$ (309)	$ (303)	$ (622)	$ (541)
Research and development expenses	(59)	(69)	(124)	(135)
Total before tax	37	(9)	3	22
Tax expense	0	(31)	(13)	(48)
Net income (loss) attributable to NCR common stockholders	37	(13)	(1)	13
Product
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of revenue	(544)	(453)	(1,036)	(861)
Cost of services
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of revenue	(982)	(768)	(1,945)	(1,490)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Selling, general and administrative expenses	0		0	0
Research and development expenses	0		0	0
Total before tax	5	0	5	(1)
Tax expense	(1)	0	(1)	0
Net income (loss) attributable to NCR common stockholders	4	0	4	(1)
Reclassification out of Accumulated Other Comprehensive Income | Product
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of revenue	0	0	0	0
Reclassification out of Accumulated Other Comprehensive Income | Cost of services
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of revenue	5	0	5	(1)
Amortization of Actuarial Loss (Gain) | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Selling, general and administrative expenses	0		0	0
Research and development expenses	0		0	0
Total before tax	0	0	0	0
Amortization of Actuarial Loss (Gain) | Reclassification out of Accumulated Other Comprehensive Income | Product
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of revenue	0	0	0	0
Amortization of Actuarial Loss (Gain) | Reclassification out of Accumulated Other Comprehensive Income | Cost of services
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of revenue	0	0	0	0
Amortization of Prior Service Benefit | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Selling, general and administrative expenses	0		0	0
Research and development expenses	0		0	0
Total before tax	0	0	(1)	(1)
Amortization of Prior Service Benefit | Reclassification out of Accumulated Other Comprehensive Income | Product
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of revenue	0	0	0	0
Amortization of Prior Service Benefit | Reclassification out of Accumulated Other Comprehensive Income | Cost of services
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of revenue	0	0	(1)	(1)
Changes in Fair Value of Effective Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Selling, general and administrative expenses	0		0	0
Research and development expenses	0		0	0
Total before tax	5	0	6	0
Changes in Fair Value of Effective Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income | Product
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of revenue	0	0	0	0
Changes in Fair Value of Effective Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income | Cost of services
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of revenue	$ 5	$ 0	$ 6	$ 0