Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net sales
Net sales	$ 3,902.3	$ 4,408.7	$ 4,578.6
Cost of sales
Cost of sales	2,867.3	3,341.6	3,679.8
Gross profit	1,035.0	1,067.1	898.8
Selling and administrative expense	858.6	908.8	893.5
Research, development and engineering expense	133.4	147.1	157.4
Impairment of assets	7.5	30.2	180.2
Loss (gain) on sale of assets, net	11.5	7.6	(6.7)
Total operating expense	1,011.0	1,093.7	1,224.4
Operating profit (loss)	24.0	(26.6)	(325.6)
Other income (expense)
Interest income	6.8	9.3	8.7
Interest expense	(292.7)	(202.9)	(154.9)
Foreign exchange loss, net	(14.4)	(5.1)	(2.5)
Miscellaneous, net	6.8	(3.6)	(4.0)
Loss before taxes	(269.5)	(228.9)	(478.3)
Income tax expense (benefit)	(1.0)	116.7	37.2
Equity in earnings (loss) of unconsolidated subsidiaries, net	0.7	1.0	(13.2)
Net loss	(267.8)	(344.6)	(528.7)
Net income (loss) income attributable to noncontrolling interests	1.3	(3.3)	2.7
Net loss attributable to Diebold Nixdorf, Incorporated	$ (269.1)	$ (341.3)	$ (531.4)
Basic and diluted weighted-average shares outstanding	77.6	76.7	76.0
Net loss attributable to Diebold Nixdorf, Incorporated
Basic and diluted loss per share	$ (3.47)	$ (4.45)	$ (6.99)
Dividends declared and paid per common share	$ 0	$ 0	$ 0.10
Service [Member]
Net sales
Net sales	$ 2,364.4	$ 2,608.0	$ 2,789.5
Cost of sales
Cost of sales	1,666.2	1,921.1	2,157.0
Product [Member]
Net sales
Net sales	1,537.9	1,800.7	1,789.1
Cost of sales
Cost of sales	$ 1,201.1	$ 1,420.5	$ 1,522.8