Supplemental Guarantor Information Supplemental Guarantor Information (Condensed Consolidating Statements of Operations and Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Total net sales	$ 1,119.0	$ 1,122.7	$ 3,288.8	$ 3,359.4
Cost of sales	890.7	882.7	2,601.1	2,641.1
Gross profit	228.3	240.0	687.7	718.3
Selling and administrative expense	216.2	208.8	663.9	692.6
Research, development and engineering expense	36.6	34.2	118.9	114.4
Impairment of assets	109.3	0.0	199.3	3.1
(Gain) loss on sale of assets, net	0.1	5.6	(6.8)	(2.5)
Operating expense	362.2	248.6	975.3	807.6
Operating profit (loss)	(133.9)	(8.6)	(287.6)	(89.3)
Other income (expense)
Interest income	2.2	4.3	7.6	15.8
Interest expense	(45.2)	(27.7)	(99.6)	(90.7)
Foreign exchange gain (loss), net	2.2	3.2	(2.3)	(4.5)
Equity in earnings of investees	0.0	0.0	0.0	0.0
Miscellaneous, net	1.8	(1.5)	0.9	1.7
Income (loss) from continuing operations before taxes	(172.9)	(30.3)	(381.0)	(167.0)
Income tax expense (benefit)	45.8	(0.9)	35.6	(60.5)
Net income (loss)	(218.7)	(29.4)	(416.6)	(106.5)
Net income (loss) attributable to noncontrolling interests	(6.1)	6.6	6.6	20.2
Net income (loss) attributable to Diebold Nixdorf, Incorporated	(212.6)	(36.0)	(423.2)	(126.7)
Comprehensive income (loss)	(237.8)	(14.7)	(514.4)	38.9
Less: comprehensive income (loss) attributable to noncontrolling interests	(7.4)	8.4	3.5	23.7
Comprehensive income (loss) attributable to Diebold Nixdorf, Incorporated	(230.4)	(23.1)	(517.9)	15.2
Reportable Legal Entities [Member] | Parent Company [Member]
Total net sales	633.0	289.1	1,277.9	831.0
Cost of sales	591.8	234.0	1,152.9	670.3
Gross profit	41.2	55.1	125.0	160.7
Selling and administrative expense	69.6	65.2	220.5	211.5
Research, development and engineering expense	0.4	1.0	2.1	1.8
Impairment of assets	0.0		0.0	3.1
(Gain) loss on sale of assets, net	0.1	(0.1)	(3.4)	0.0
Operating expense	70.1	66.1	219.2	216.4
Operating profit (loss)	(28.9)	(11.0)	(94.2)	(55.7)
Other income (expense)
Interest income	0.5	0.6	1.1	1.7
Interest expense	(41.0)	(25.7)	(91.9)	(84.4)
Foreign exchange gain (loss), net	2.8	0.5	(5.5)	3.1
Equity in earnings of investees	(62.8)	11.0	(191.1)	(42.3)
Miscellaneous, net	0.3	1.7	(0.5)	9.0
Income (loss) from continuing operations before taxes	(129.1)	(22.9)	(382.1)	(168.6)
Income tax expense (benefit)	83.5	13.1	41.1	(41.9)
Net income (loss)	(212.6)	(36.0)	(423.2)	(126.7)
Net income (loss) attributable to noncontrolling interests	0.0	0.0	0.0	0.0
Net income (loss) attributable to Diebold Nixdorf, Incorporated	(212.6)	(36.0)	(423.2)	(126.7)
Comprehensive income (loss)	(230.4)	(23.1)	(517.9)	15.2
Less: comprehensive income (loss) attributable to noncontrolling interests	0.0	0.0	0.0	0.0
Comprehensive income (loss) attributable to Diebold Nixdorf, Incorporated	(230.4)	(23.1)	(517.9)	15.2
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]
Total net sales	0.1	0.6	0.4	6.9
Cost of sales	1.1	1.8	1.7	10.5
Gross profit	(1.0)	(1.2)	(1.3)	(3.6)
Selling and administrative expense	1.2	2.7	3.8	7.7
Research, development and engineering expense	10.8	10.8	33.1	30.5
Impairment of assets	0.0		0.0	0.0
(Gain) loss on sale of assets, net	0.0	0.1	0.0	0.1
Operating expense	12.0	13.6	36.9	38.3
Operating profit (loss)	(13.0)	(14.8)	(38.2)	(41.9)
Other income (expense)
Interest income	0.0	0.1	0.1	0.2
Interest expense	0.0	0.0	0.0	(0.1)
Foreign exchange gain (loss), net	(0.1)	0.0	(0.1)	0.1
Equity in earnings of investees	0.0	0.0	0.0	0.0
Miscellaneous, net	0.3	1.8	0.9	5.9
Income (loss) from continuing operations before taxes	(12.8)	(12.9)	(37.3)	(35.8)
Income tax expense (benefit)	12.6	2.6	(5.6)	(17.7)
Net income (loss)	(25.4)	(15.5)	(31.7)	(18.1)
Net income (loss) attributable to noncontrolling interests	0.0	0.0	0.0	0.0
Net income (loss) attributable to Diebold Nixdorf, Incorporated	(25.4)	(15.5)	(31.7)	(18.1)
Comprehensive income (loss)	(25.4)	(15.5)	(31.7)	(18.1)
Less: comprehensive income (loss) attributable to noncontrolling interests	0.0	0.0	0.0	0.0
Comprehensive income (loss) attributable to Diebold Nixdorf, Incorporated	(25.4)	(15.5)	(31.7)	(18.1)
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]
Total net sales	485.9	833.0	2,010.5	2,526.6
Cost of sales	297.8	646.9	1,446.5	1,965.4
Gross profit	188.1	186.1	564.0	561.2
Selling and administrative expense	145.4	140.9	439.6	473.4
Research, development and engineering expense	25.4	22.4	83.7	82.1
Impairment of assets	109.3		199.3	0.0
(Gain) loss on sale of assets, net	0.0	5.6	(3.4)	(2.6)
Operating expense	280.1	168.9	719.2	552.9
Operating profit (loss)	(92.0)	17.2	(155.2)	8.3
Other income (expense)
Interest income	1.7	3.6	6.4	13.9
Interest expense	(4.2)	(2.0)	(7.7)	(6.2)
Foreign exchange gain (loss), net	(0.5)	2.7	3.3	(7.7)
Equity in earnings of investees	0.0	0.0	0.0	0.0
Miscellaneous, net	1.2	(4.7)	0.5	(12.0)
Income (loss) from continuing operations before taxes	(93.8)	16.8	(152.7)	(3.7)
Income tax expense (benefit)	(50.3)	(16.6)	0.1	(0.9)
Net income (loss)	(43.5)	33.4	(152.8)	(2.8)
Net income (loss) attributable to noncontrolling interests	(6.1)	6.6	6.6	20.2
Net income (loss) attributable to Diebold Nixdorf, Incorporated	(37.4)	26.8	(159.4)	(23.0)
Comprehensive income (loss)	(59.2)	56.3	(247.1)	179.0
Less: comprehensive income (loss) attributable to noncontrolling interests	(7.4)	8.4	3.5	23.7
Comprehensive income (loss) attributable to Diebold Nixdorf, Incorporated	(51.8)	47.9	(250.6)	155.3
Consolidation, Eliminations [Member]
Total net sales	0.0	0.0	0.0	(5.1)
Cost of sales	0.0	0.0	0.0	(5.1)
Gross profit	0.0	0.0	0.0	0.0
Selling and administrative expense	0.0	0.0	0.0	0.0
Research, development and engineering expense	0.0	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	0.0
Operating expense	0.0	0.0	0.0	0.0
Operating profit (loss)	0.0	0.0	0.0	0.0
Other income (expense)
Interest income	0.0	0.0	0.0	0.0
Interest expense	0.0	0.0	0.0	0.0
Foreign exchange gain (loss), net	0.0	0.0	0.0	0.0
Equity in earnings of investees	62.8	(11.0)	191.1	42.3
Miscellaneous, net	0.0	(0.3)	0.0	(1.2)
Income (loss) from continuing operations before taxes	62.8	(11.3)	191.1	41.1
Income tax expense (benefit)	0.0	0.0	0.0	0.0
Net income (loss)	62.8	(11.3)	191.1	41.1
Net income (loss) attributable to noncontrolling interests	0.0	0.0	0.0	0.0
Net income (loss) attributable to Diebold Nixdorf, Incorporated	62.8	(11.3)	191.1	41.1
Comprehensive income (loss)	77.2	(32.4)	282.3	(137.2)
Less: comprehensive income (loss) attributable to noncontrolling interests	0.0	0.0	0.0	0.0
Comprehensive income (loss) attributable to Diebold Nixdorf, Incorporated	$ 77.2	$ (32.4)	$ 282.3	$ (137.2)