Derivative Instruments and Hedging Activities.

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Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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Fixed interest rate related to the interest rate derivative.

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The number of derivative instruments of a particular group held by the entity.

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Fair value as of the balance sheet date of all foreign currency derivatives not designated as hedging instruments.

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The increase (decrease) during the period in the net carrying value of derivative instruments reported as assets and liabilities that are due to be disposed of within one year (or the normal operating cycle, if longer).

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The increase (decrease) during the period in the carrying value of derivative instruments reported as liabilities that are due to be disposed of within one year (or the normal operating cycle, if longer).

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Amount of the cost of borrowed funds accounted for as interest expense.

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Fair value as of the balance sheet date of interest rate derivative assets, net of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized on the balance sheet.

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Net fair value of all derivatives designated as hedges of net investment in foreign operations.

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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The cash inflow provided by derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Amount, before tax, of increase (decrease) in the cumulative translation adjustment from gain (loss) on foreign currency derivatives that are designated as, and are effective as, economic hedges of a net investment in a foreign entity.

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Amount of unrealized gain (loss) related to the increase or decrease in fair value of interest rate derivatives designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income to the extent that the cash flow hedge was determined to be effective.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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Derivative Instruments and Hedging Activities (Textuals) (Details) € in Millions, £ in Millions, $ in Millions							3 Months Ended								12 Months Ended
	Nov. 01, 2018 USD ($)	Jul. 23, 2018 USD ($)	Jun. 21, 2018 USD ($)	Sep. 21, 2017 USD ($)	May 09, 2017 EUR (€)	Mar. 30, 2017 EUR (€)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2018 GBP (£)	Dec. 31, 2018 EUR (€)	May 09, 2017 USD ($)	Nov. 30, 2016 USD ($)
Derivative [Line Items]
Net sales							$ 1,289.8	$ 1,119.0	$ 1,105.6	$ 1,064.2	$ 1,249.9	$ 1,122.7	$ 1,133.9	$ 1,102.8	$ 4,578.6	$ 4,609.3	$ 3,316.3
Cost of sales															3,687.7	3,609.5	2,604.6
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax															4.9	(41.3)
Derivative Instruments and Hedging Activities (Textuals)
Fair value of investment hedge contracts							0.0				2.0				0.0	2.0
Derivatives used in net investment hedge, increase (decrease), gross of tax															9.1	(2.2)
Fair value of non-designated foreign exchange forward contracts							$ 0.5				(4.9)				0.5	(4.9)
Interest expense															154.9	117.3	101.4
Gain on interest rate cash flow hedges, pretax															0.0
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net															(10.3)	2.0	8.5
Proceeds from sale of foreign currency option and forward contracts, net															0.0	0.0	16.2
Net income (loss) recognized in other comprehensive income (net of tax of $0.3, $(1.7) and $(3.0), respectively)															$ (1.4)	3.9	4.9
Currency Forward Agreements EUR to GBP [Member]
Derivative [Line Items]
Number of foreign currency option contracts							12								12			12	12
Derivative Instruments and Hedging Activities (Textuals)
Notional amount of pay-fixed receive-variable interest rate swaps																		£ 27.5	€ 30.9
Interest Rate Swap
Derivative Instruments and Hedging Activities (Textuals)
Notional amount of pay-fixed receive-variable interest rate swaps																					$ 400.0
Interest expense															$ 2.9	4.3	5.1
Interest Rate Derivatives, at Fair Value, Net							$ 10.1				9.8				10.1	9.8
Foreign Exchange Forward and Cash Flow Hedges [Member]
Derivative [Line Items]
Net sales															2.4	0.0	0.0
Cost of sales															0.6	0.0	$ 0.0
Derivative Instruments and Hedging Activities (Textuals)
Increase (Decrease) in Derivative Assets and Liabilities															0.0
Term Loan B EUR [Member]
Derivative Instruments and Hedging Activities (Textuals)
Increase (Decrease) in Derivative Liabilities	$ 29.2	$ 180.2	$ 30.2	$ 101.1	€ 66.8	€ 130.6
Unsecured Debt																				$ 70.0
Diebold Nixdorf AG \| Interest Rate Swap
Derivative Instruments and Hedging Activities (Textuals)
Notional amount of pay-fixed receive-variable interest rate swaps \| €																			€ 50.0
Interest expense															$ 1.9	1.4
Derivative, Fixed Interest Rate							2.974%								2.974%			2.974%	2.974%
Interest Rate Derivatives, at Fair Value, Net							$ (3.6)				$ (5.5)				$ (3.6)	(5.5)
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Interest Rate Hedges
Derivative Instruments and Hedging Activities (Textuals)
Interest expense															(2.6)	$ 0.4
Accounting Standards Update 2017-12 [Member]
Derivative [Line Items]
Net sales															2.4
Cost of sales															$ 0.6