Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosures [Line Items]
Income Tax Effects Allocated Directly to Equity	$ (1.8)	$ 5.4	$ (38.5)
Federal Statutory Income Tax Rate	35.00%
Effective Income Tax Rate Reconciliation, Percent	(28.40%)	(29.90%)
Foreign subsidiary earnings	$ 13.7	$ (9.1)	14.6
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Research and Development, Amount		5.6
Income tax penalties and interest accrued	7.6	7.2
Operating loss carryforwards	523.1
Net loss carryforward, deferred tax asset	88.4	58.5
Operating loss carryforwards, set to expire	333.8
Operating loss carryforwards, no expiration	189.3
Tax credit carryforwards, foreign	46.5
Tax credit carryforwards, general business	5.6
Deferred tax asset, change in amount	23.9	24.1
Valuation Allowances and Reserves, Reserves of Businesses Acquired	9.1
Deferred tax liability not recognized, amount of unrecognized deferred tax liability	523.3
Unrecognized Tax Benefits, Income Tax Penalties Expense	2.1
Income tax expense	$ 93.9	9.6	6.2
Minimum
Income Tax Disclosures [Line Items]
Recognition of tax positions, likelihood of being realized upon settlement	50.00%
Valuation Allowance of Deferred Tax Assets [Member]
Income Tax Disclosures [Line Items]
Income Tax Effects Allocated Directly to Equity	$ 7.7	(20.4)	$ (9.2)
High Taxed Foreign Earnings [Member]
Income Tax Disclosures [Line Items]
Foreign subsidiary earnings		$ 13.0
Diebold Nixdorf AG
Income Tax Disclosures [Line Items]
Unrecognized Tax Benefits, Increase Resulting from Acquisition	$ 28.5