Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net loss	$ (344.6)	$ (528.7)	$ (213.9)
Interest rate hedges:
Net (loss) income recognized in other comprehensive income (net of tax of $0.7, $0.3 and $(1.7), respectively)	(8.8)	(1.4)	3.9
Less: reclassification adjustments for amounts recognized in net (loss) income (net of tax of $(0.3), $(0.6) and $(0.1), respectively)	(3.4)	(2.6)	0.4
Total interest rate hedges, net of tax	(5.4)	1.2	3.5
Pension and other post-retirement benefits:
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax	(0.6)	0.0	0.0
Net actuarial losses recognized during the year (net of tax of $0.6, $(1.1) and $(3.3), respectively)	4.6	4.8	2.2
Prior service (benefit) cost occurring during the year (net of tax of $0.0, $0.0 and $(0.5), respectively)	0.0	0.0	0.4
Net actuarial (gain) loss occurring during the year (net of tax of $(3.1), $(4.0) and $(6.6), respectively)	(25.8)	(10.9)	4.5
Net actuarial losses recognized due to settlement (net of tax of $(0.1), $(1.3) and $0.4, respectively)	(1.0)	(3.5)	(0.2)
Acquired benefit plans and other (net of tax of $(0.4), $0.0 and $1.5, respectively)	(3.0)	(7.7)	(1.5)
Currency impact (net of tax of $0.0, $(0.3) and $(1.9), respectively)	0.2	(0.9)	1.3
Total pension and other postretirement benefits, net of tax	(25.6)	(18.2)	6.7
Other	0.1	0.0	(0.2)
Other comprehensive (loss) income, net of tax	(72.4)	(111.9)	150.9
Comprehensive loss	(417.0)	(640.6)	(63.0)
Less: comprehensive (loss) income attributable to noncontrolling interests	(4.7)	(1.2)	33.5
Comprehensive loss attributable to Diebold Nixdorf, Incorporated	(412.3)	(639.4)	(96.5)
Translation adjustment
Other comprehensive income (loss), net of tax:
Translation adjustment (net of tax of $4.9, $(2.7) and $8.4, respectively)	(40.8)	(70.1)	140.3
Foreign currency hedges
Other comprehensive income (loss), net of tax:
Foreign currency hedges (net of tax of $(0.4), $(1.2) and $0.2, respectively)	(0.7)	4.2	0.6
Accounting Standards Update 2018-02 [Member]
Pension and other post-retirement benefits:
Other comprehensive (loss) income, net of tax	$ 0.0	$ (29.0)	$ 0.0