Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Amounts attributable to Diebold Nixdorf, Incorporated
Net loss		$ (131.9)	$ (65.6)
Net income attributable to noncontrolling interests		0.8	7.6
Net loss attributable to Diebold Nixdorf, Incorporated		$ (132.7)	$ (73.2)
Denominator (in millions)
Weighted-average number of common shares used in basic loss per share		76.4	75.8
Weighted-average number of common shares used in diluted earnings (loss) per share (1)	[1]	76.4	75.8
Basic earnings (loss) per share
Basic earnings (loss) per share		$ (1.74)	$ (0.97)
Diluted earnings (loss) per share
Diluted earnings (loss) per share		$ (1.74)	$ (0.97)
Anti-dilutive shares (in milllions)
Anti-dilutive shares not used in calculating diluted weighted-average		3.7	4.3
Incremental Shares Excluded From Dilutive Calculation Due To Resulting in Operating Loss		1.2	0.9

[1] 1.2 and 0.9 shares for the three months ended March 31, 2019 and 2018, respectively, would have been included in the weighted-average number of shares used in diluted earnings (loss) per share used in the computation of diluted earnings (loss) per share because their effects are dilutive.