Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Amounts attributable to Diebold Nixdorf, Incorporated
Net income (loss)	$ (133.4)	$ (23.6)	$ (196.7)	$ (75.8)
Net income attributable to noncontrolling interests	5.1	7.0	12.7	13.6
Net income (loss) attributable to Diebold Nixdorf, Incorporated	$ (138.5)	$ (30.6)	$ (209.4)	$ (89.4)
Denominator (in millions)
Weighted-average number of common shares used in basic earnings (loss) per share	76.0	75.5	75.9	75.4
Weighted-average number of shares used in diluted earnings (loss) per share (1)	76.0	75.5	75.9	75.4
Basic earnings (loss) per share
Basic earnings (loss) per share	$ (1.82)	$ (0.41)	$ (2.76)	$ (1.19)
Diluted earnings (loss) per share
Diluted earnings (loss) per share	$ (1.82)	$ (0.41)	$ (2.76)	$ (1.19)
Anti-dilutive shares (in milllions)
Anti-dilutive shares not used in calculating diluted weighted-average	5.0	2.9	4.4	2.6
Incremental Shares Excluded From Dilutive Calculation Due To Resulting in Operating Loss	0.7	1.0	0.8	0.9