Quarterly Information (unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information [Table Text Block]

In millions, except per share amounts	First			Second			Third			Fourth
2019
Total revenue	$	1,536		$	1,710		$	1,783		$	1,886
Gross margin	411			471			507			532
Income from operations	100			157			172			182
Income from continuing operations (attributable to NCR)	37			88			105			384
Income (loss) from discontinued operations, net of tax	—			—			(15		)	(35		)
Net (loss) income attributable to NCR common stockholders	24			76			11			343
Income (loss) per share attributable to NCR common stockholders:
Income (loss) per common share from continuing operations
Basic	$	0.20		$	0.63		$	0.21		$	2.96
Diluted	$	0.20		$	0.58		$	0.21		$	2.67
Net (loss) income per common share
Basic	$	0.20		$	0.63		$	0.09		$	2.69
Diluted	$	0.20		$	0.58		$	0.09		$	2.43
2018
Total revenue	$	1,517		$	1,537		$	1,550		$	1,801
Gross margin	420			403			410			442
Income (loss) from operations	109			(106		)	125			63
Income (loss) from continuing operations (attributable to NCR)	55			(143		)	85			(33		)
(Loss) from discontinued operations, net of tax	(35		)	(2		)	(1		)	(14		)
Net income (loss) attributable to NCR common stockholders	8			(157		)	72			(60		)
Income (loss) per share attributable to NCR common stockholders:
Income (loss) per common share from continuing operations
Basic	$	0.36		$	(1.31	)	$	0.62		$	(0.39	)
Diluted	$	0.35		$	(1.31	)	$	0.57		$	(0.39	)
Net income (loss) per common share
Basic	$	0.07		$	(1.33	)	$	0.61		$	(0.51	)
Diluted	$	0.06		$	(1.33	)	$	0.56		$	(0.51	)