Earnings Per Share - Basic Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Numerator:
Income (loss) from continuing operations	$ 9	$ (33)
Series A convertible preferred stock dividends	(4)	(4)
Income (loss) from continuing operations attributable to NCR common stockholders	5	(37)
Income (loss) from discontinued operations, net of tax	0	(1)
Net income (loss) attributable to NCR common stockholders	$ 5	$ (38)
Denominator:
Weighted average outstanding shares of common stock (in shares)	139.6	135.7
Basic earnings per share:
From continuing operations (in dollars per share)	$ 0.04	$ (0.27)
From discontinued operations (in dollars per share)	0	(0.01)
Total basic earnings (loss) per share (in dollars per share)	$ 0.04	$ (0.28)