Equity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018		Mar. 31, 2017
Diebold Nixdorf, Incorporated shareholders' equity
Balance at beginning of period	$ 470.0		$ 591.4
Comprehensive income (loss) attributable to Diebold Nixdorf, Incorporated	(80.1)		(13.9)
Common shares	0.6		0.6
Additional capital	13.0		(32.8)
Treasury shares	(2.5)		(4.6)
Dividends paid	(7.7)		(7.6)
Balance at end of period	426.9		533.1
Noncontrolling interests
Balance at beginning of period	36.8		433.4
Comprehensive income attributable to noncontrolling interests, net	7.6	[1]	6.6
Reclassification From Noncontrolling Interests To Redeemable Noncontrolling Interests	0.0		(386.7)
Minority Interest Decrease From Reclassification of Guaranteed Dividends To Other Current Liabilities	(4.4)		(5.7)
Distributions to noncontrolling interest holders	(0.5)		(12.8)
Sale of minority interest	(3.3)		0.0
Balance at end of period	36.2		34.8
Adjustments for New Accounting Pronouncement [Member] | Retained Earnings [Member]
Diebold Nixdorf, Incorporated shareholders' equity
Adoption of accounting standards	$ 33.6		$ 0.0

[1] The decrease for the three months ended March 31, 2017 is primarily attributable to the redemption value adjustment to the redeemable noncontrolling interest.