Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Total revenue	$ 1,589,000,000	$ 1,783,000,000	$ 4,576,000,000	$ 5,029,000,000
Selling, general and administrative expenses	254,000,000	271,000,000	743,000,000	775,000,000
Research and development expenses	55,000,000	64,000,000	169,000,000	185,000,000
Total operating expenses	1,471,000,000	1,611,000,000	4,292,000,000	4,600,000,000
Operating Income (Loss)	118,000,000	172,000,000	284,000,000	429,000,000
Loss on Extinguishment of Debt	(20,000,000)	0	(20,000,000)	0
Interest expense	(60,000,000)	(53,000,000)	(167,000,000)	(143,000,000)
Other expense, net	(6,000,000)	(11,000,000)	(10,000,000)	(28,000,000)
Income (loss) from continuing operations before income taxes	32,000,000	108,000,000	87,000,000	258,000,000
Income tax expense (benefit)	0	4,000,000	(33,000,000)	28,000,000
Income (loss) from continuing operations	32,000,000	104,000,000	120,000,000	230,000,000
Loss from discontinued operations, net of tax	0	(15,000,000)	0	(15,000,000)
Net income (loss)	32,000,000	89,000,000	120,000,000	215,000,000
Net income (loss) attributable to noncontrolling interests	1,000,000	(1,000,000)	2,000,000	0
Net income (loss) attributable to NCR	31,000,000	90,000,000	118,000,000	215,000,000
Amounts attributable to NCR common stockholders:
Income (loss) from continuing operations	31,000,000	105,000,000	118,000,000	230,000,000
Dividends on convertible preferred stock	(6,000,000)	(79,000,000)	(19,000,000)	(104,000,000)
Income (loss) from continuing operations attributable to NCR common stockholders	25,000,000	26,000,000	99,000,000	126,000,000
Loss from discontinued operations, net of tax	0	(15,000,000)	0	(15,000,000)
Net income (loss) attributable to NCR common stockholders	$ 25,000,000	$ 11,000,000	$ 99,000,000	$ 111,000,000
Income (loss) per common share from continuing operations
Basic (in dollars per share)	$ 0.19	$ 0.21	$ 0.77	$ 1.05
Diluted (in dollars per share)	0.19	0.21	0.76	1.03
Net income (loss) per common share
Basic (in dollars per share)	0.19	0.09	0.77	0.92
Diluted (in dollars per share)	$ 0.19	$ 0.09	$ 0.76	$ 0.90
Weighted average common shares outstanding
Basic (in shares)	128.5	121.4	128.2	120.3
Diluted (in shares)	129.7	123.4	129.8	122.7
Product
Total revenue	$ 521,000,000	$ 712,000,000	$ 1,476,000,000	$ 1,915,000,000
Cost of revenue	452,000,000	555,000,000	1,254,000,000	1,547,000,000
Services
Total revenue	1,068,000,000	1,071,000,000	3,100,000,000	3,114,000,000
Cost of revenue	$ 710,000,000	$ 721,000,000	$ 2,126,000,000	$ 2,093,000,000