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Derivative Instruments and Hedging Activities (Textuals) (Details) € in Millions, £ in Millions, $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2015 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 EUR (€)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 GBP (£)	Nov. 30, 2016 USD ($)	Aug. 15, 2016 EUR (€)	Apr. 30, 2016 EUR (€)	Apr. 29, 2016 EUR (€)	Apr. 29, 2016 USD ($)	Nov. 23, 2015 EUR (€)	Nov. 23, 2015 USD ($)	Mar. 31, 2006 USD ($)
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net					$ 22.8
Number of foreign currency option contracts																2	2
Derivative Instruments and Hedging Activities (Textuals)
Fair value of investment hedge contracts	$ 1.0						$ 1.0		$ (0.3)
Document Period End Date				Dec. 31, 2016	Dec. 31, 2016
Derivatives used in net investment hedge, increase (decrease), gross of tax					$ (13.3)		10.4
Fair value of non-designated foreign exchange forward contracts	0.9						0.9		2.6
Notional amount of pay-fixed receive-variable interest rate swaps																€ 1,416.0	$ 1,547.1	$ 200.0
Interest expense					101.4		32.5	$ 31.4
Gain on interest rate cash flow hedges, pretax					0.0		1.1
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net					8.5		13.5	14.8
Proceeds from sale of foreign currency option and forward contracts, net					16.2		0.0	0.0
Increase (Decrease) in Derivative Assets and Liabilities					9.3		7.0	0.0
Net income recognized in other comprehensive income (net of tax of $3.0, $(0.3) and $(0.4), respectively)					4.9		0.8	0.7
Currency Forward Agreements EUR to USD [Member]
Derivative [Line Items]
Derivative Amount Not Hedged									$ 16.4
Number of foreign currency option contracts				18					18	18
Derivative Instruments and Hedging Activities (Textuals)
Notional amount of pay-fixed receive-variable interest rate swaps				€ 48.4					$ 54.0
Interest Rate Swap
Derivative Instruments and Hedging Activities (Textuals)
Notional amount of pay-fixed receive-variable interest rate swaps											$ 400.0
Interest expense					5.1		4.2	$ 6.3
Currency Forward Agreements EUR to GBP [Member]
Derivative [Line Items]
Derivative Amount Not Hedged \| £										£ 9.4
Number of foreign currency option contracts				13					13	13
Derivative Instruments and Hedging Activities (Textuals)
Notional amount of pay-fixed receive-variable interest rate swaps				€ 45.0						£ 36.7
Foreign Exchange Option [Member]
Derivative Instruments and Hedging Activities (Textuals)
Derivative, Average Foreign Currency Option Strike Price				1.09					1.09	1.09
Proceeds from sale of foreign currency option and forward contracts, net					42.6
Increase (Decrease) in Derivative Assets and Liabilities	(7.0)				35.6
Foreign Exchange Forward and Cash Flow Hedges [Member]
Derivative [Line Items]
Number of foreign currency option contracts														1	1
Derivative Instruments and Hedging Activities (Textuals)
Notional amount of pay-fixed receive-variable interest rate swaps														€ 713.0	$ 820.9
Increase (Decrease) in Derivative Assets and Liabilities					(26.4)
Derivative, Forward Exchange Rate														1.1514	1.1514
Derivative, Cost of Hedge Net of Cash Received		$ 792.6
Term Loan B EUR [Member]
Derivative Instruments and Hedging Activities (Textuals)
Unsecured Debt \| €				€ 350.0									€ 350.0
Devalue Of Euro Against USD By Ten Percent [Member] \| Cash Flow Hedging [Member]
Derivative [Line Items]
Foreign Currency Fair Value Hedge Derivative at Fair Value, Net \| €				3.9
Revalue Of Euro Against USD By Ten Percent [Member] \| Cash Flow Hedging [Member]
Derivative [Line Items]
Foreign Currency Fair Value Hedge Derivative at Fair Value, Net \| €				4.8
Devalue Of Euro Against GBP By Ten Percent [Member] \| Cash Flow Hedging [Member]
Derivative [Line Items]
Foreign Currency Fair Value Hedge Derivative at Fair Value, Net \| €				4.6
Revalue Of Euro Against GBP By Ten Percent [Member] \| Cash Flow Hedging [Member]
Derivative [Line Items]
Foreign Currency Fair Value Hedge Derivative at Fair Value, Net \| €				5.6
Diebold Nixdorf AG
Derivative Instruments and Hedging Activities (Textuals)
Cash paid					995.3	€ 1,162.2
Diebold Nixdorf AG \| Interest Rate Swap
Derivative Instruments and Hedging Activities (Textuals)
Notional amount of pay-fixed receive-variable interest rate swaps \| €				€ 50.0
Derivative, Fixed Interest Rate				2.974%					2.974%	2.974%
Interest Rate Derivatives, at Fair Value, Net \| €				€ (6.3)								€ (7.9)
Fair Value, Measurements, Recurring \| Interest Rate Swap
Derivative Instruments and Hedging Activities (Textuals)
Derivative Asset	0.0						0.0		$ 8.4
Fair Value, Measurements, Recurring \| Foreign Exchange Option [Member]
Derivative Instruments and Hedging Activities (Textuals)
Derivative Asset	$ 7.0						7.0
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Interest Rate Hedges
Derivative Instruments and Hedging Activities (Textuals)
Interest expense					$ 0.2		$ 0.4
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Interest Rate Hedges \| Subsequent Event [Member]
Derivative Instruments and Hedging Activities (Textuals)
Interest expense			$ 0.8
Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities (Textuals)
Net income recognized in other comprehensive income (net of tax of $3.0, $(0.3) and $(0.4), respectively) \| €				€ 1.6