Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Total revenue	$ 1,503,000,000	$ 1,536,000,000
Selling, general and administrative expenses	255,000,000	252,000,000
Research and development expenses	65,000,000	59,000,000
Total operating expenses	1,426,000,000	1,436,000,000
Income (loss) from operations	77,000,000	100,000,000
Interest expense	(50,000,000)	(45,000,000)
Other expense, net	(2,000,000)	(8,000,000)
Income (loss) from continuing operations before income taxes	25,000,000	47,000,000
Income tax expense (benefit)	1,000,000	9,000,000
Income (loss) from continuing operations	24,000,000	38,000,000
Loss from discontinued operations, net of tax	0	0
Net income (loss)	24,000,000	38,000,000
Net income (loss) attributable to noncontrolling interests	1,000,000	1,000,000
Net income (loss) attributable to NCR	23,000,000	37,000,000
Amounts attributable to NCR common stockholders:
Income (loss) from continuing operations	23,000,000	37,000,000
Dividends on convertible preferred stock	(6,000,000)	(13,000,000)
Income (loss) from continuing operations attributable to NCR common stockholders	17,000,000	24,000,000
Loss from discontinued operations, net of tax	0	0
Net income (loss) attributable to NCR common stockholders	$ 17,000,000	$ 24,000,000
Income (loss) per common share from continuing operations
Basic (in dollars per share)	$ 0.13	$ 0.20
Diluted (in dollars per share)	0.13	0.20
Net income (loss) per common share
Basic (in dollars per share)	0.13	0.20
Diluted (in dollars per share)	$ 0.13	$ 0.20
Weighted average common shares outstanding
Basic (in shares)	128.0	119.3
Diluted (in shares)	130.5	122.2
Product
Total revenue	$ 474,000,000	$ 539,000,000
Cost of revenue	391,000,000	453,000,000
Services
Total revenue	1,029,000,000	997,000,000
Cost of revenue	$ 715,000,000	$ 672,000,000