Equity (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 1,009.0	$ 1,025.7	$ (2,130.6)	$ (1,473.6)	$ 1,009.0	$ (2,130.6)
Net loss	14.8	(14.0)	(677.3)	(111.5)	0.8	(788.8)
Other comprehensive (loss) income	(34.1)	(38.0)	19.6	8.5	(72.1)	28.1
Share-based compensation issued			(0.1)	0.0
Share-based compensation expense	2.6	1.9	0.8	1.3
Distribution to noncontrolling interest holders, net		(3.4)
Treasury shares				(0.8)
Ending balance	1,025.7	1,079.2	(1,473.6)	(1,371.1)	1,079.2	(1,371.1)
Total Diebold Nixdorf, Incorporated Shareholders' Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	996.7	1,013.1	(2,135.4)	(1,485.2)	996.7	(2,135.4)
Net loss	14.9	(14.6)	(677.1)	(111.1)
Other comprehensive (loss) income	(33.9)	(38.0)	26.2	6.3
Share-based compensation issued			(0.1)
Share-based compensation expense	2.6	1.9	0.8	1.3
Treasury shares				(0.8)
Ending balance	1,013.1	1,063.8	(1,485.2)	(1,380.9)	1,063.8	(1,380.9)
Common Shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	0.4	0.4	121.2	120.8	0.4	121.2
Share-based compensation issued			0.4	1.0
Ending balance	0.4	0.4	120.8	119.8	0.4	119.8
Additional Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,043.2	1,040.6	832.1	831.8	1,043.2	832.1
Share-based compensation issued			(0.5)	(1.0)
Share-based compensation expense	2.6	1.9	0.8	1.3
Ending balance	1,040.6	1,038.7	831.8	831.5	1,038.7	831.5
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	17.4	2.5	(2,194.9)	(1,517.8)	17.4	(2,194.9)
Net loss	14.9	(14.6)	(677.1)	(111.1)
Ending balance	2.5	17.1	(1,517.8)	(1,406.7)	17.1	(1,406.7)
Treasury Shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	0.0	0.0	(586.4)	(586.4)	0.0	(586.4)
Treasury shares				(0.8)
Ending balance	0.0	0.0	(586.4)	(585.6)	0.0	(585.6)
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(64.3)	(30.4)	(327.5)	(353.7)	(64.3)	(327.5)
Other comprehensive (loss) income	(33.9)	(38.0)	26.2	6.3
Ending balance	(30.4)	7.6	(353.7)	(360.0)	7.6	(360.0)
Equity Warrants
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	0.0	0.0	20.1	20.1	0.0	20.1
Ending balance	0.0	0.0	20.1	20.1	0.0	20.1
Non-controlling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	12.3	12.6	4.8	11.6	12.3	4.8
Net loss	(0.1)	0.6	(0.2)	(0.4)
Other comprehensive (loss) income	(0.2)		(6.6)	2.2
Distribution to noncontrolling interest holders, net		(3.4)
Ending balance	$ 12.6	$ 15.4	$ 11.6	$ 9.8	$ 15.4	$ 9.8