Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ 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
Income (loss) used in basic and diluted earnings (loss) per share
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
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
Income (loss) before discontinued operations, net of tax										(233.1)	(176.7)	57.8
Income from discontinued operations, net of tax		0.0	0.0	0.0	0.0	0.0	(4.6)	0.5	147.8	0.0	143.7	15.9
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
Denominator
Weighted-average number of common shares used in basic earnings (loss) per share		75.5	75.5	75.5	75.3	75.1	70.9	65.2	65.1	75.5	69.1	64.9
Effect of dilutive shares (1) (shares)	[1]									0.0	0.0	0.7
Weighted-average number of shares used in diluted earnings (loss) per share (shares)		75.5	75.5	75.5	75.3	75.1	70.9	65.2	65.7	75.5	69.1	65.6
Basic earnings (loss) per share
Income (loss) before discontinued operations, net of tax		$ (1.43)	$ (0.47)	$ (0.41)	$ (0.78)	$ (1.04)	$ (1.38)	$ (0.33)	$ 0.31	$ (3.09)	$ (2.56)	$ 0.89
Income from discontinued operations, net of tax		0.00	0.00	0.00	0.00	0.00	(0.06)	0.01	2.27	0.00	2.08	0.24
Net (loss) income attributable to Diebold, Incorporated (USD per share)		(1.43)	(0.47)	(0.41)	(0.78)	(1.04)	(1.44)	(0.32)	2.58	(3.09)	(0.48)	1.13
Diluted earnings (loss) per share
Income (loss) before discontinued operations, net of tax		(1.43)	(0.47)	(0.41)	(0.78)	(1.04)	(1.38)	(0.33)	0.31	(3.09)	(2.56)	0.88
Income from discontinued operations, net of tax		0.00	0.00	0.00	0.00	0.00	(0.06)	0.01	2.25	0.00	2.08	0.24
Net (loss) income attributable to Diebold, Incorporated		$ (1.43)	$ (0.47)	$ (0.41)	$ (0.78)	$ (1.04)	$ (1.44)	$ (0.32)	$ 2.56	$ (3.09)	$ (0.48)	$ 1.12
Anti-dilutive shares
Anti-dilutive shares not used in calculating diluted weighted-average shares (shares)										3.4	2.1	1.5
Incremental shares, excluded from dilutive calculation, due to resulting in operating loss										0.7	0.6

[1] Incremental shares of 0.7 and 0.6 were excluded from the computation of diluted loss per share for the years ended December 31, 2017 and 2016, respectively, because their effect is anti-dilutive due to the loss from continuing operations.The first quarterly dividend of 2018 is $0.10 per share payable March 16, 2018 to shareholders of record on February 26, 2018.