Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net loss	$ (78.1)	$ (267.8)	$ (344.6)
Interest rate hedges:
Net loss recognized in other comprehensive income (net of tax of $3.4, $(5.9) and $0.7, respectively)	8.6	(16.3)	(8.8)
Less: reclassification adjustments for amounts recognized in net (loss) income (net of tax of $0.8, $(1.8) and $(0.3), respectively)	2.1	(5.0)	(3.4)
Total interest rate hedges, net of tax	6.5	(11.3)	(5.4)
Pension and other post-retirement benefits:
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax	0.0	0.5	(0.6)
Net actuarial gains recognized during the year (net of tax of $23.2, $1.5 and $0.6, respectively)	76.0	6.1	4.6
Net actuarial gains (losses) occurring during the year (net of tax of $2.0, $(3.9) and $(3.1), respectively)	7.5	(9.7)	(25.8)
Net actuarial gains (losses) recognized due to settlement (net of tax of $(0.4), $0.3 and $(0.1), respectively)	(0.7)	0.8	(1.0)
Acquired benefit plans and other (net of tax of $0.0, $0.0 and $(0.4), respectively)	0.1	0.2	(3.2)
Currency impact (net of tax of $(0.4), $0.5 and $0.0, respectively)	(0.6)	1.8	0.4
Total pension and other postretirement benefits, net of tax	82.3	(0.3)	(25.6)
Other	(0.9)	(0.8)	0.1
Other comprehensive income (loss), net of tax	35.0	(39.2)	(72.4)
Comprehensive loss	(43.1)	(307.0)	(417.0)
Less: comprehensive income (loss) attributable to noncontrolling interests	1.3	(0.3)	(4.7)
Comprehensive loss attributable to Diebold Nixdorf, Incorporated	(44.4)	(306.7)	(412.3)
Translation adjustment
Other comprehensive income (loss), net of tax:
Translation adjustment (net of tax of $(6.6), $(10.2) and $4.9, respectively)	(53.6)	(26.8)	(40.8)
Foreign currency hedges
Other comprehensive income (loss), net of tax:
Foreign currency hedges (net of tax of $0.0, $(0.3) and $(0.4), respectively)	$ 0.7	$ 0.0	$ (0.7)