Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net sales
Net sales	$ 995.2	$ 1,078.8	$ 2,796.4	$ 3,257.1
Cost of sales
Total cost of sales	711.1	807.4	2,037.9	2,460.4
Gross profit	284.1	271.4	758.5	796.7
Selling and administrative expense	226.0	219.9	629.7	674.3
Research, development and engineering expense	30.2	36.8	93.4	109.8
Asset Impairment Charges	4.1	0.0	4.1	0.0
(Gain) loss on sale of assets, net	0.0	(8.5)	13.0	6.6
Total operating expense	260.3	248.2	740.2	790.7
Operating profit (loss)	23.8	23.2	18.3	6.0
Other income (expense)
Interest income	1.9	1.9	5.4	7.0
Interest expense	(144.3)	(52.5)	(240.6)	(153.3)
Foreign exchange gain, net	(2.3)	(1.8)	(9.5)	(4.1)
Miscellaneous, net	(1.5)	(1.0)	4.1	(2.8)
Loss before taxes	(122.4)	(30.2)	(222.3)	(147.2)
Income tax (benefit) expense	(21.5)	5.2	(4.9)	74.8
Equity in earnings of unconsolidated subsidiaries	0.0	0.6	0.0	0.0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total	(100.9)	(34.8)	(217.4)	(222.0)
Net (loss) income attributable to noncontrolling interests	0.5	0.9	0.5	(3.3)
Net loss attributable to Diebold Nixdorf, Incorporated	$ (101.4)	$ (35.7)	$ (217.9)	$ (218.7)
Weighted-average number of common shares used in basic and diluted loss per share (1)	77.7	76.8	77.5	76.6
Earnings Per Share [Abstract]
Basic and diluted loss per share	$ (1.31)	$ (0.46)	$ (2.81)	$ (2.86)
Service [Member]
Net sales
Net sales	$ 588.9	$ 643.0	$ 1,736.4	$ 1,931.0
Cost of sales
Total cost of sales	399.2	462.4	1,226.5	1,423.3
Product [Member]
Net sales
Net sales	406.3	435.8	1,060.0	1,326.1
Cost of sales
Total cost of sales	311.9	345.0	811.4	1,037.1
Retained Earnings [Member]
Other income (expense)
Net loss attributable to Diebold Nixdorf, Incorporated	$ (101.4)	$ (35.7)	$ (217.9)	$ (218.7)