Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Total revenue	$ 1,866,000,000	$ 1,544,000,000
Selling, general and administrative expenses	313,000,000	238,000,000
Research and development expenses	65,000,000	66,000,000
Total operating expenses	1,833,000,000	1,434,000,000
Income (loss) from operations	33,000,000	110,000,000
Interest expense	(63,000,000)	(45,000,000)
Other income (expense), net	9,000,000	(17,000,000)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	(21,000,000)	48,000,000
Income tax expense (benefit)	13,000,000	17,000,000
Income (loss) from continuing operations	(34,000,000)	31,000,000
Loss from discontinued operations, net of tax	(1,000,000)	0
Net income (loss)	(35,000,000)	31,000,000
Net income (loss) attributable to noncontrolling interests	(1,000,000)	1,000,000
Net income (loss) attributable to NCR	(34,000,000)	30,000,000
Amounts attributable to NCR common stockholders:
Income (loss) from continuing operations	(33,000,000)	30,000,000
Series A convertible preferred stock dividends	(4,000,000)	(4,000,000)
Income (loss) from continuing operations attributable to NCR common stockholders	(37,000,000)	26,000,000
Loss from discontinued operations, net of tax	(1,000,000)	0
Net income (loss) attributable to NCR common stockholders	$ (38,000,000)	$ 26,000,000
Income (loss) per common share from continuing operations
Basic (in dollars per share)	$ (0.27)	$ 0.20
Diluted (in dollars per share)	(0.27)	0.19
Net income (loss) per common share
Basic (in dollars per share)	(0.28)	0.20
Diluted (in dollars per share)	$ (0.28)	$ 0.19
Weighted average common shares outstanding
Basic (in shares)	135.7	130.0
Diluted (in shares)	135.7	134.7
Product
Total revenue	$ 516,000,000	$ 482,000,000
Cost of revenue	492,000,000	408,000,000
Services
Total revenue	1,350,000,000	1,062,000,000
Cost of revenue	$ 963,000,000	$ 722,000,000