Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Amounts attributable to Diebold Nixdorf, Incorporated
Net income (loss)	$ (218.7)	$ (29.4)	$ (416.6)	$ (106.5)
Net income (loss) attributable to noncontrolling interests	(6.1)	6.6	6.6	20.2
Net income (loss) attributable to Diebold Nixdorf, Incorporated	$ (212.6)	$ (36.0)	$ (423.2)	$ (126.7)
Denominator (in millions)
Weighted-average number of common shares used in basic earnings (loss) per share	76.1	75.5	76.0	75.4
Weighted-average number of shares used in diluted earnings (loss) per share (1)	76.1	75.5	76.0	75.4
Basic earnings (loss) per share
Basic earnings (loss) per share	$ (2.79)	$ (0.48)	$ (5.57)	$ (1.68)
Diluted earnings (loss) per share
Diluted earnings (loss) per share	$ (2.79)	$ (0.48)	$ (5.57)	$ (1.68)
Anti-dilutive shares (in milllions)
Document Period End Date			Sep. 30, 2018
Anti-dilutive shares not used in calculating diluted weighted-average	4.7	2.8	4.6	2.6
Incremental Shares Excluded From Dilutive Calculation Due To Resulting in Operating Loss	0.7	0.8	0.8	0.7