Equity (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Balance	$ (1,317.7)	$ (1,247.2)	$ (1,008.6)	$ (863.5)	$ (842.6)	$ (840.0)	$ (1,317.7)	$ (863.5)
Net loss attributable to Diebold Nixdorf, Incorporated	(49.8)			(2.1)			(432.1)	(40.5)
Net loss	(50.5)	(199.1)	(183.9)	(2.0)	(30.3)	(8.1)	(433.5)	(40.4)
Other comprehensive loss	(22.7)	(44.5)	13.9	(23.5)	23.4	(30.4)	(53.3)	(30.5)
Share-based compensation issued	(0.1)	0.2	0.0	0.0	0.0	0.0
Share-based compensation expense	2.7	5.2	1.7	4.6	4.5	3.5
Treasury shares	(0.1)	0.0	(3.3)	0.0	(0.2)	(5.2)
Reclassifications of redeemable noncontrolling interest						31.9
Balance	(1,247.2)	(1,008.6)	(837.0)	(842.6)	(840.0)	(831.7)	(837.0)	(831.7)
Common Stock [Member]
Balance	119.7	119.6	119.5	118.2	118.2	118.0	119.7	118.2
Share-based compensation issued	(0.1)	(0.1)	(1.2)	0.0	(0.2)	(1.1)
Balance	119.6	119.5	118.3	118.2	118.0	116.9	118.3	116.9
Additional Paid-in Capital [Member]
Balance	827.7	825.0	820.1	818.4	813.8	809.5	827.7	818.4
Share-based compensation issued	0.0	(0.3)	(1.2)	0.0	(0.2)	(1.1)
Share-based compensation expense	2.7	5.2	1.7	4.6	4.5	3.5
Reclassifications of redeemable noncontrolling interest						19.2
Balance	825.0	820.1	819.6	813.8	809.5	787.9	819.6	787.9
Retained Earnings [Member]
Balance	(1,254.5)	(1,204.7)	(1,005.5)	(782.8)	(780.7)	(750.4)	(1,254.5)	(782.8)
Net loss attributable to Diebold Nixdorf, Incorporated	(49.8)	(199.2)	(183.1)	(2.1)	(30.3)	(8.1)	(432.1)	(40.5)
Balance	(1,204.7)	(1,005.5)	(822.4)	(780.7)	(750.4)	(742.3)	(822.4)	(742.3)
Treasury Stock [Member]
Balance	(585.5)	(585.4)	(585.4)	(582.1)	(582.1)	(581.9)	(585.5)	(582.1)
Treasury shares	(0.1)	0.0	(3.3)	0.0	(0.2)	(5.2)
Balance	(585.4)	(585.4)	(582.1)	(582.1)	(581.9)	(576.7)	(582.1)	(576.7)
AOCI Attributable to Parent
Balance	(436.8)	(412.2)	(365.4)	(444.0)	(420.5)	(443.8)	(436.8)	(444.0)
Other comprehensive loss	(24.6)	(46.8)	13.1	(23.5)	23.3	(30.9)
Balance	(412.2)	(365.4)	(378.5)	(420.5)	(443.8)	(412.9)	(378.5)	(412.9)
Parent [Member]
Balance	(1,329.4)	(1,257.7)	(1,016.7)	(872.3)	(851.3)	(848.6)	(1,329.4)	(872.3)
Net loss attributable to Diebold Nixdorf, Incorporated	(49.8)	(199.2)	(183.1)	(2.1)	(30.3)	(8.1)
Other comprehensive loss	(24.6)	(46.8)	13.1	(23.5)	23.3	(30.9)
Share-based compensation issued	(0.1)	0.2		0.0	0.0	0.0
Share-based compensation expense	2.7	5.2	1.7	4.6	4.5	3.5
Treasury shares	(0.1)	0.0	(3.3)	0.0	(0.2)	(5.2)
Reclassifications of redeemable noncontrolling interest						19.2
Balance	(1,257.7)	(1,016.7)	(845.1)	(851.3)	(848.6)	(827.1)	(845.1)	(827.1)
Noncontrolling Interest [Member]
Balance	11.7	10.5	8.1	8.8	8.7	8.6	11.7	8.8
Net loss	(0.7)	0.1	(0.8)	0.1	0.0	0.0
Other comprehensive loss	1.9	2.3	0.8	0.0	0.1	0.5
Reclassifications of redeemable noncontrolling interest						(12.7)
Balance	$ 10.5	$ 8.1	$ 8.1	$ 8.7	$ 8.6	$ (4.6)	$ 8.1	$ (4.6)