EARNINGS PER SHARE - Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Income (loss) from continuing operations	$ 64,000,000	$ 97,000,000	$ (7,000,000)
Series A convertible preferred stock dividends		(16,000,000)	(31,000,000)
Net income (loss) from continuing operations attributable to NCR common stockholders	48,000,000	81,000,000	(38,000,000)
Loss from discontinued operations, net of tax	(4,000,000)	0	(72,000,000)
Net income (loss) attributable to NCR common stockholders	$ 44,000,000	$ 81,000,000	$ (110,000,000)
Denominator:
Basic (in shares)	136.7	131.2	128.4
Dilutive effect of as-if Series A Convertible Preferred Stock (in shares)	0.0	0.0	0.0
Dilutive effect of employee stock options and restricted stock units (in shares)	4.5	7.8	0.0
Weighted average diluted shares (in shares)	141.2	139.0	128.4
Diluted earnings (loss) per share:
Diluted (in dollars per share)	$ 0.34	$ 0.58	$ (0.30)
From discontinued operations (in dollars per share)	(0.03)	0	(0.56)
Diluted (in dollars per share)	$ 0.31	$ 0.58	$ (0.86)