Consolidated Statements of Equity - USD ($) shares in Millions, $ in Millions	Total	Common Shares	Additional Capital	Retained Earnings	Treasury Shares	Accumulated Other Comprehensive Income (Loss)	Total Diebold Nixdorf, Incorporated Shareholders' Equity	Non-controlling Interests
Balance (shares) at Dec. 31, 2017		90.5
Balance at Dec. 31, 2017	$ 482.3	$ 113.2	$ 721.5	$ 374.5	$ (567.4)	$ (196.3)	$ 445.5	$ 36.8
Net loss	(528.7)			(531.4)			(531.4)	2.7
Other Comprehensive Income (Loss), Net of Tax	(111.9)					(108.0)	(108.0)	(3.9)
Restricted stock units issued, shares		0.8
Share-based compensation issued	(0.1)	$ 1.0	(1.1)				(0.1)
Share-based compensation expense	36.6		36.6				36.6
Dividends declared and paid	(7.7)			(7.7)			(7.7)
Treasury shares	(3.0)				(3.0)		(3.0)
Accounting principle change	33.6			33.6			33.6
Reclassification of guaranteed dividend to accrued liabilities	(3.4)							(3.4)
Reclassification From Noncontrolling Interests To Redeemable Noncontrolling Interests	(15.2)		(15.2)				(15.2)	0.0
Distributions to noncontrolling interest holders, net	(0.5)							(0.5)
Acquisitions and divestitures, net	(4.9)							(4.9)
Balance (shares) at Dec. 31, 2018		91.3
Balance at Dec. 31, 2018	(122.9)	$ 114.2	741.8	(131.0)	(570.4)	(304.3)	(149.7)	26.8
Net loss	(344.6)			(341.3)			(341.3)	(3.3)
Other Comprehensive Income (Loss), Net of Tax	(72.4)					(71.0)	(71.0)	(1.4)
Restricted stock units issued, shares		0.9
Share-based compensation issued	0.1	$ 1.1	(1.0)				0.1
Share-based compensation expense	24.0		24.0				24.0
Treasury shares	(1.5)				(1.5)		(1.5)
Reclassification From Noncontrolling Interests To Redeemable Noncontrolling Interests	14.0		9.1				9.1	4.9
Acquisitions and divestitures, net	(3.0)							(3.0)
Balance (shares) at Dec. 31, 2019		92.2
Balance at Dec. 31, 2019	(506.3)	$ 115.3	773.9	(472.3)	(571.9)	(375.3)	(530.3)	24.0
Net loss	(267.8)			(269.1)			(269.1)	1.3
Other Comprehensive Income (Loss), Net of Tax	(39.2)					(37.6)	(37.6)	(1.6)
Restricted stock units issued, shares		1.3
Share-based compensation issued	0.0	$ 1.6	(1.6)				0.0
Share-based compensation expense	14.9		14.9				14.9
Treasury shares	(4.8)				(4.8)		(4.8)
Reclassification From Noncontrolling Interests To Redeemable Noncontrolling Interests	0.7		0.7				0.7
DistributionToNoncontrollingInterestAndEmployeeShareTrusts	(0.9)			(0.9)			(0.9)
Acquisitions and divestitures, net	(28.3)							(28.3)
Balance (shares) at Dec. 31, 2020		93.5
Balance at Dec. 31, 2020	$ (831.7)	$ 116.9	$ 787.9	$ (742.3)	$ (576.7)	$ (412.9)	$ (827.1)	$ (4.6)