Equity (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Balance	$ (1,247.2)	$ (1,008.6)	$ (842.6)	$ (840.0)	$ (1,247.2)	$ (842.6)
Net loss attributable to Diebold Nixdorf, Incorporated	(199.2)		(30.3)		(382.3)	(38.4)
Net loss	(199.1)	(183.9)	(30.3)	(8.1)	(383.0)	(38.4)
Other comprehensive loss	(44.5)	13.9	23.4	(30.4)	(30.6)	(7.0)
Share-based compensation issued	0.2	0.0	0.0	0.0
Share-based compensation expense	5.2	1.7	4.5	3.5
Treasury shares	0.0	(3.3)	(0.2)	(5.2)
Reclassifications of redeemable noncontrolling interest				31.9
Balance	(1,008.6)	(837.0)	(840.0)	(831.7)	(837.0)	(831.7)
Common Stock [Member]
Balance	119.6	119.5	118.2	118.0	119.6	118.2
Share-based compensation issued	(0.1)	(1.2)	(0.2)	(1.1)
Balance	119.5	118.3	118.0	116.9	118.3	116.9
Additional Paid-in Capital [Member]
Balance	825.0	820.1	813.8	809.5	825.0	813.8
Share-based compensation issued	(0.3)	(1.2)	(0.2)	(1.1)
Share-based compensation expense	5.2	1.7	4.5	3.5
Reclassifications of redeemable noncontrolling interest				19.2
Balance	820.1	819.6	809.5	787.9	819.6	787.9
Retained Earnings [Member]
Balance	(1,204.7)	(1,005.5)	(780.7)	(750.4)	(1,204.7)	(780.7)
Net loss attributable to Diebold Nixdorf, Incorporated	(199.2)	(183.1)	(30.3)	(8.1)	(382.3)	(38.4)
Balance	(1,005.5)	(822.4)	(750.4)	(742.3)	(822.4)	(742.3)
Treasury Stock [Member]
Balance	(585.4)	(585.4)	(582.1)	(581.9)	(585.4)	(582.1)
Treasury shares	0.0	(3.3)	(0.2)	(5.2)
Balance	(585.4)	(582.1)	(581.9)	(576.7)	(582.1)	(576.7)
AOCI Attributable to Parent
Balance	(412.2)	(365.4)	(420.5)	(443.8)	(412.2)	(420.5)
Other comprehensive loss	(46.8)	13.1	23.3	(30.9)
Balance	(365.4)	(378.5)	(443.8)	(412.9)	(378.5)	(412.9)
Parent [Member]
Balance	(1,257.7)	(1,016.7)	(851.3)	(848.6)	(1,257.7)	(851.3)
Net loss attributable to Diebold Nixdorf, Incorporated	(199.2)	(183.1)	(30.3)	(8.1)
Other comprehensive loss	(46.8)	13.1	23.3	(30.9)
Share-based compensation issued	0.2		0.0	0.0
Share-based compensation expense	5.2	1.7	4.5	3.5
Treasury shares	0.0	(3.3)	(0.2)	(5.2)
Reclassifications of redeemable noncontrolling interest				19.2
Balance	(1,016.7)	(845.1)	(848.6)	(827.1)	(845.1)	(827.1)
Noncontrolling Interest [Member]
Balance	10.5	8.1	8.7	8.6	10.5	8.7
Net loss	0.1	(0.8)	0.0	0.0
Other comprehensive loss	2.3	0.8	0.1	0.5
Reclassifications of redeemable noncontrolling interest				(12.7)
Balance	$ 8.1	$ 8.1	$ 8.6	$ (4.6)	$ 8.1	$ (4.6)