Earnings Per Share - Basic Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Income (loss) from continuing operations	$ 20	$ 35	$ 29	$ 2
Series A convertible preferred stock dividends	(4)	(4)	(8)	(8)
Income (loss) from continuing operations attributable to NCR common stockholders	16	31	21	(6)
Income (loss) from discontinued operations, net of tax	(1)	6	(1)	5
Net income (loss) attributable to NCR common stockholders	$ 15	$ 37	$ 20	$ (1)
Denominator:
Weighted average outstanding shares of common stock (in shares)	140.4	136.6	140.0	136.2
Basic earnings per share:
From continuing operations (in dollars per share)	$ 0.11	$ 0.23	$ 0.15	$ (0.04)
From discontinued operations (in dollars per share)	0	0.04	(0.01)	0.03
Total basic earnings (loss) per share (in dollars per share)	$ 0.11	$ 0.27	$ 0.14	$ (0.01)