Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income (loss) used in basic and diluted loss per share
Net loss	$ (78.1)	$ (267.8)	$ (344.6)
Net income (loss) income attributable to noncontrolling interests	0.7	1.3	(3.3)
Net loss attributable to Diebold Nixdorf, Incorporated	$ (78.8)	$ (269.1)	$ (341.3)
Denominator
Weighted-average number of common shares used in basic and diluted earnings (loss) per share (1)	78.3	77.6	76.7
Net loss per share attributable to Diebold Nixdorf, Incorporated
Basic and diluted loss per share	$ (1.01)	$ (3.47)	$ (4.45)
Anti-dilutive shares
Anti-dilutive shares not used in calculating diluted weighted-average shares (shares)	3.9	2.4	3.2
Incremental shares, excluded from dilutive calculation, due to resulting in operating loss	1.2	1.2	1.6