Supplemental Guarantor Information (Condensed Consolidation Statement of Operations) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net sales	$ 1,249.9	$ 1,122.7	$ 1,133.9	$ 1,102.8	$ 1,243.4	$ 983.3	$ 580.0	$ 509.6	$ 4,609.3	$ 3,316.3	$ 2,419.3
Cost of sales									3,599.6	2,594.6	1,767.3
Gross profit (loss)	288.4	241.0	237.8	242.5	230.2	197.6	155.1	138.8	1,009.7	721.7	652.0
Selling and administrative expense									933.7	761.2	488.2
Research, development and engineering expense									155.5	110.2	86.9
Impairment of assets									3.1	9.8	18.9
(Gain) loss on sale of assets, net									1.0	0.3	(0.6)
Total operating expense									1,093.3	881.5	593.4
Operating profit (loss)									(83.6)	(159.8)	58.6
Other income (expense)
Interest income									20.3	21.5	26.0
Interest expense									(117.3)	(101.4)	(32.5)
Foreign exchange gain (loss), net									(3.9)	(2.1)	(10.0)
Equity in earnings of subsidiaries									0.0	0.0	0.0
Miscellaneous, net									8.8	3.5	3.7
Income (loss) from continuing operations before taxes									(175.7)	(238.3)	45.8
Income tax (benefit) expense									29.8	(67.6)	(13.7)
Income (loss) from continuing operations, net of tax	(100.9)	(28.8)	(23.6)	(52.2)	(73.4)	(97.2)	(20.8)	20.7	(205.5)	(170.7)	59.5
Income (loss) from discontinued operations, net of tax										143.7	15.9
Net income (loss)	(100.9)	(28.8)	(23.6)	(52.2)	(73.4)	(101.8)	(20.3)	168.5	(205.5)	(27.0)	75.4
Net income attributable to noncontrolling interests, net of tax	7.4	6.6	7.0	6.6	4.4	0.5	0.8	0.3	27.6	6.0	1.7
Net income (loss) attributable to Diebold Nixdorf, Incorporated	$ (108.3)	$ (35.4)	$ (30.6)	$ (58.8)	$ (77.8)	$ (102.3)	$ (21.1)	$ 168.2	(233.1)	(33.0)	73.7
Comprehensive income (loss)									(54.6)	(47.0)	(52.8)
Less: comprehensive income attributable to noncontrolling interests									33.5	9.2	3.2
Comprehensive income (loss) attributable to Diebold Nixdorf, Incorporated									(88.1)	(56.2)	(56.0)
Parent Company [Member]
Net sales									1,126.4	1,119.6	959.3
Cost of sales									898.0	859.4	645.7
Gross profit (loss)									228.4	260.2	313.6
Selling and administrative expense									283.8	314.4	268.5
Research, development and engineering expense									3.1	7.9	8.3
Impairment of assets									3.1	0.0	0.0
(Gain) loss on sale of assets, net									0.5	0.3	0.3
Total operating expense									290.5	322.6	277.1
Operating profit (loss)									(62.1)	(62.4)	36.5
Other income (expense)
Interest income									2.3	2.5	0.2
Interest expense									(108.7)	(100.1)	(30.3)
Foreign exchange gain (loss), net									(0.5)	(3.5)	4.0
Equity in earnings of subsidiaries									(32.8)	(60.0)	29.4
Miscellaneous, net									6.2	1.8	(9.3)
Income (loss) from continuing operations before taxes									(195.6)	(221.7)	30.5
Income tax (benefit) expense									37.5	(53.5)	(28.3)
Income (loss) from continuing operations, net of tax										(168.2)	58.8
Income (loss) from discontinued operations, net of tax										135.2	14.9
Net income (loss)									(233.1)	(33.0)	73.7
Net income attributable to noncontrolling interests, net of tax									0.0	0.0	0.0
Net income (loss) attributable to Diebold Nixdorf, Incorporated									(233.1)	(33.0)	73.7
Comprehensive income (loss)									(88.1)	(56.2)	(53.9)
Less: comprehensive income attributable to noncontrolling interests									0.0	0.0	0.0
Comprehensive income (loss) attributable to Diebold Nixdorf, Incorporated									(88.1)	(56.2)	(53.9)
Guarantor Subsidiaries [Member]
Net sales									7.4	85.0	171.4
Cost of sales									12.3	92.0	181.2
Gross profit (loss)									(4.9)	(7.0)	(9.8)
Selling and administrative expense									10.5	11.5	10.6
Research, development and engineering expense									40.6	45.7	59.3
Impairment of assets									0.0	5.1	9.1
(Gain) loss on sale of assets, net									0.4	(0.1)	0.0
Total operating expense									51.5	62.2	79.0
Operating profit (loss)									(56.4)	(69.2)	(88.8)
Other income (expense)
Interest income									0.2	0.6	1.0
Interest expense									(0.1)	(0.1)	(0.2)
Foreign exchange gain (loss), net									(0.1)	(0.1)	(0.5)
Equity in earnings of subsidiaries									0.0	0.0	0.0
Miscellaneous, net									7.7	7.8	13.2
Income (loss) from continuing operations before taxes									(48.7)	(61.0)	(75.3)
Income tax (benefit) expense									(15.5)	(28.6)	(12.1)
Income (loss) from continuing operations, net of tax										(32.4)	(63.2)
Income (loss) from discontinued operations, net of tax										0.0	0.0
Net income (loss)									(33.2)	(32.4)	(63.2)
Net income attributable to noncontrolling interests, net of tax									0.0	0.0	0.0
Net income (loss) attributable to Diebold Nixdorf, Incorporated									(33.2)	(32.4)	(63.2)
Comprehensive income (loss)									(33.2)	(32.4)	(63.2)
Less: comprehensive income attributable to noncontrolling interests									0.0	0.0	0.0
Comprehensive income (loss) attributable to Diebold Nixdorf, Incorporated									(33.2)	(32.4)	(63.2)
Non-Guarantor Subsidiaries [Member]
Net sales									3,480.6	2,194.9	1,458.4
Cost of sales									2,694.4	1,725.5	1,109.2
Gross profit (loss)									786.2	469.4	349.2
Selling and administrative expense									639.4	435.3	209.1
Research, development and engineering expense									111.8	56.6	19.3
Impairment of assets									0.0	4.7	9.8
(Gain) loss on sale of assets, net									0.1	0.1	(0.9)
Total operating expense									751.3	496.7	237.3
Operating profit (loss)									34.9	(27.3)	111.9
Other income (expense)
Interest income									17.8	18.4	24.8
Interest expense									(8.5)	(1.2)	(2.0)
Foreign exchange gain (loss), net									(3.3)	1.5	(13.5)
Equity in earnings of subsidiaries									0.0	0.0	0.0
Miscellaneous, net									(3.8)	(6.1)	51.3
Income (loss) from continuing operations before taxes									37.1	(14.7)	172.5
Income tax (benefit) expense									7.8	14.5	26.7
Income (loss) from continuing operations, net of tax										(29.2)	145.8
Income (loss) from discontinued operations, net of tax										8.5	1.0
Net income (loss)									29.3	(20.7)	146.8
Net income attributable to noncontrolling interests, net of tax									27.6	6.0	1.7
Net income (loss) attributable to Diebold Nixdorf, Incorporated									1.7	(26.7)	145.1
Comprehensive income (loss)									200.7	(55.1)	0.2
Less: comprehensive income attributable to noncontrolling interests									33.5	9.2	3.2
Comprehensive income (loss) attributable to Diebold Nixdorf, Incorporated									167.2	(64.3)	(3.0)
Reclassifications And Eliminations [Member]
Net sales									(5.1)	(83.2)	(169.8)
Cost of sales									(5.1)	(82.3)	(168.8)
Gross profit (loss)									0.0	(0.9)	(1.0)
Selling and administrative expense									0.0	0.0	0.0
Research, development and engineering expense									0.0	0.0	0.0
Impairment of assets									0.0	0.0	0.0
(Gain) loss on sale of assets, net									0.0	0.0	0.0
Total operating expense									0.0	0.0	0.0
Operating profit (loss)									0.0	(0.9)	(1.0)
Other income (expense)
Interest income									0.0	0.0	0.0
Interest expense									0.0	0.0	0.0
Foreign exchange gain (loss), net									0.0	0.0	0.0
Equity in earnings of subsidiaries									32.8	60.0	(29.4)
Miscellaneous, net									(1.3)	0.0	(51.5)
Income (loss) from continuing operations before taxes									31.5	59.1	(81.9)
Income tax (benefit) expense									0.0	0.0	0.0
Income (loss) from continuing operations, net of tax										59.1	(81.9)
Income (loss) from discontinued operations, net of tax										0.0	0.0
Net income (loss)									31.5	59.1	(81.9)
Net income attributable to noncontrolling interests, net of tax									0.0	0.0	0.0
Net income (loss) attributable to Diebold Nixdorf, Incorporated									31.5	59.1	(81.9)
Comprehensive income (loss)									(134.0)	96.7	64.1
Less: comprehensive income attributable to noncontrolling interests									0.0	0.0	0.0
Comprehensive income (loss) attributable to Diebold Nixdorf, Incorporated									$ (134.0)	$ 96.7	$ 64.1