Restructuring (Textuals) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2019	Aug. 15, 2016
Unusual or Infrequent Item [Line Items]
Restructuring Charges	$ 38.3	$ 17.4	$ 44.4	$ 44.7
Document Period End Date			Sep. 30, 2018
Impairment of assets	(109.3)	0.0	$ (199.3)	(3.1)
Restructuring Liabilities	0.0	(8.2)	0.0	(8.2)
DN Now [Member]
Unusual or Infrequent Item [Line Items]
Restructuring Charges	38.3
Anticipated Annual Synergies			130.0
DN Now [Member] | Minimum [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	90.0		90.0
DN Now [Member] | Maximum [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	110.0		110.0
Delta Program [Member]
Unusual or Infrequent Item [Line Items]
Restructuring Liabilities		37.3		37.3		$ 45.5
DN2020 Plan [Member]
Unusual or Infrequent Item [Line Items]
Restructuring Charges		17.4	6.0
Strategic Alliance Plan [Member]
Unusual or Infrequent Item [Line Items]
Restructuring Charges			0.1
Segment Reconciling Items [Member]
Unusual or Infrequent Item [Line Items]
Restructuring Charges	38.3	17.4	44.4	44.7
Non routine (expenses) income net	(152.0)	(72.7)	(322.5)	(206.2)
Subsequent Event [Member] | DN2020 Plan [Member]
Unusual or Infrequent Item [Line Items]
Anticipated Annual Synergies					$ 240.0
Severance
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	145.5		145.5
Restructuring Charges	38.3	17.4	44.4	44.7
Severance | DN Now [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	38.3		38.3
Severance | Delta Program [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	3.2		3.2
Severance | DN2020 Plan [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	95.8		95.8
Severance | Strategic Alliance Plan [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	8.2		8.2
Severance | Eurasia Banking
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	72.5		72.5
Restructuring Charges	12.3	13.6	16.0	22.7
Severance | Eurasia Banking | DN Now [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	12.3		12.3
Severance | Eurasia Banking | Delta Program [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	0.5		0.5
Severance | Eurasia Banking | DN2020 Plan [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	51.5		51.5
Severance | Eurasia Banking | Strategic Alliance Plan [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	8.2		8.2
Severance | Americas Banking
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	21.3		21.3
Restructuring Charges	7.5	0.4	7.8	3.8
Severance | Americas Banking | DN Now [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	7.5		7.5
Severance | Americas Banking | Delta Program [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	0.2		0.2
Severance | Americas Banking | DN2020 Plan [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	13.6		13.6
Severance | Americas Banking | Strategic Alliance Plan [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	0.0		0.0
Severance | Retail
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	22.3		22.3
Restructuring Charges	6.0	3.1	6.8	12.8
Severance | Retail | DN Now [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	6.0		6.0
Severance | Retail | Delta Program [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	0.7		0.7
Severance | Retail | DN2020 Plan [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	15.6		15.6
Severance | Retail | Strategic Alliance Plan [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	0.0		0.0
Severance | Corporate
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	29.4		29.4
Restructuring Charges	12.5	0.3	13.8	5.4
Severance | Corporate | DN Now [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	12.5		12.5
Severance | Corporate | Delta Program [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	1.8		1.8
Severance | Corporate | DN2020 Plan [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	15.1		15.1
Severance | Corporate | Strategic Alliance Plan [Member]
Unusual or Infrequent Item [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	$ 0.0		$ 0.0
Measurement Period Adjustment [Member] | Diebold Nixdorf AG [Member] | Delta Program [Member]
Unusual or Infrequent Item [Line Items]
Restructuring Liabilities		$ 8.2		$ 8.2