Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Amounts attributable to Diebold Nixdorf, Incorporated
Net income (loss)	$ (63.3)	$ (52.2)
Net income attributable to noncontrolling interests	7.6	6.6
Net income (loss) attributable to Diebold Nixdorf, Incorporated	$ (70.9)	$ (58.8)
Denominator (in millions)
Weighted-average number of common shares used in basic earnings (loss) per share	75.8	75.3
Weighted-average number of shares used in diluted earnings (loss) per share (1)	75.8	75.3
Basic earnings (loss) per share
Basic earnings (loss) per share	$ (0.94)	$ (0.78)
Diluted earnings (loss) per share
Diluted earnings (loss) per share	$ (0.94)	$ (0.78)
Anti-dilutive shares (in milllions)
Anti-dilutive shares not used in calculating diluted weighted-average	4.3	1.9
Incremental Shares Excluded From Dilutive Calculation Due To Resulting in Operating Loss	0.9	0.9