Acquisitions (Details) € / shares in Units, $ / shares in Units, € in Millions, $ in Millions	3 Months Ended								5 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2017 USD ($) shares	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2016 EUR (€) shares	Dec. 31, 2015 USD ($)	Dec. 31, 2017 € / shares	Dec. 31, 2016 € / shares	Aug. 15, 2016 USD ($) shares
Business Acquisition [Line Items]
Incremental shares, excluded from dilutive calculation, due to resulting in operating loss | shares											700,000	600,000	600,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life											4 years 1 month
Net sales	$ 1,249.9	$ 1,122.7	$ 1,133.9	$ 1,102.8	$ 1,243.4	$ 983.3	$ 580.0	$ 509.6			$ 4,609.3	$ 3,316.3		$ 2,419.3
Payments for acquisition, net of cash acquired											5.6	884.6		59.4
Total cost of sales											3,599.6	2,594.6		1,767.3
Selling, General and Administrative Expense											933.7	761.2		488.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Restructuring Liabilities	(8.2)				45.5				$ 45.5		(8.2)	45.5
Redeemable noncontrolling interests	(492.1)				(44.1)				(44.1)		(492.1)	(44.1)		0.0
Reclassification of noncontrolling interest											(386.7)	(407.9)
Noncontrolling interests	36.8				433.4				433.4		36.8	433.4
Goodwill	1,117.1				998.3				998.3		1,117.1	998.3		161.5
Income (loss) from continuing operations before taxes											(175.7)	(238.3)		45.8
Net income (loss) attributable to Diebold Nixdorf, Incorporated	$ (108.3)	(35.4)	$ (30.6)	$ (58.8)	(77.8)	$ (102.3)	$ (21.1)	$ 168.2			$ (233.1)	(33.0)		$ 73.7
Diebold Nixdorf AG
Business Acquisition [Line Items]
Business Acquisition, Ordinary Shares Issued | shares	33,100,000										33,100,000
Business Acquisition, Treasury Shares | shares	3,300,000										3,300,000
Business Acquisition, Number Of Ordinary Shares Tendered | shares																	22,900,000
Business Acquisition, Percentage Tendered Of Ordinary Shares Issued																	69.20%
Business Acquisition, Percentage Tendered Of Ordinary Shares Outstanding																	76.70%
Business Combination, Consideration Transferred											$ 1,265.7
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares											9,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																	$ 831.1
Net sales									1,054.8		$ 2,467.6
Business Acquisition, Pro Forma Revenue												4,996.2
Business Combination Pro Forma Gross Profit												1,176.4
Business Combination Pro Forma Operating Profit												72.9
Business Acquisition, Ordinary Shares Outstanding | shares	29,800,000										29,800,000
Cash paid											$ 995.3		€ 1,162.2
Less: cash acquired											(110.7)
Payments for acquisition, net of cash acquired											884.6
Common shares issued to Diebold Nixdorf AG shareholders	$ 279.7										279.7
Other consideration											(9.3)
Trade receivables		469.6			474.1				474.1	$ 469.6		474.1
Inventories		498.1			487.2				487.2	498.1		487.2
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory										0.0
Deferred income taxes		115.5			109.7				109.7	115.5		109.7
Prepaid expenses		39.0			39.3				39.3	39.0		39.3
Current assets held for sale		106.6			106.6				106.6	106.6		106.6
Other current assets		79.6			79.9				79.9	79.6		79.9
Property, plant and equipment		236.6			247.1				247.1	236.6		247.1
Other assets		27.0			27.0				27.0	27.0		27.0
Total assets acquired		2,403.1			2,373.0				2,373.0	2,403.1		2,373.0
Notes payable		159.8			159.8				159.8	159.8		159.8
Accounts payable		321.5			321.5				321.5	321.5		321.5
Deferred revenue		177.6			158.0				158.0	177.6		158.0
Payroll and other benefits liabilities		184.3			191.6				191.6	184.3		191.6
Current liabilities held for sale		56.6			56.6				56.6	56.6		56.6
Other current liabilities		202.2			196.3				196.3	202.2		196.3
Pensions and other benefits		103.2			103.2				103.2	103.2		103.2
Other noncurrent liabilities		467.9			458.9				458.9	467.9		458.9
Total liabilities assumed		1,673.1			1,645.9				1,645.9	1,673.1		1,645.9
Redeemable noncontrolling interests		(46.8)			(46.8)				(46.8)	(46.8)		(46.8)
Fair value of noncontrolling interest	(407.9)										(407.9)
Noncontrolling interests	$ 21.2										21.2
Business Combination, Acquisition Related Costs											$ 97.2
Total identifiable net assets acquired, including noncontrolling interest		275.3			272.4				272.4	275.3		272.4
Business Combination Consideration Transferred Net Of Cash Acquired		1,155.0			1,155.0				1,155.0	1,155.0		1,155.0
Goodwill		879.7			882.6				882.6	879.7		882.6
Business Acquisition, Pro Forma Net Income (Loss)												$ 39.6
Business Acquisition, Pro Forma Earnings Per Share, Basic | $ / shares												$ 0.53
Business Acquisition, Pro Forma Earnings Per Share, Diluted | $ / shares												$ 0.52
Weighted Average Basic Shares Outstanding, Pro Forma | shares												75,100,000	75,100,000
Pro Forma Weighted Average Shares Outstanding, Diluted | shares												75,700,000	75,700,000
Business Acquisition, Share Price | € / shares															€ 38.98
Business Acquisition, Shares Exchanged For Acquiree Shares | shares	0.434										0.434
Purchase Accounting Pretax Charge Deferred Revenue									30.4		$ 30.4
Purchase Accounting Pretax Charge Related to Inventory Valuation Adjustment from Business Acquisition									1.9
Purchase Accounting Pretax Charge Amortization Expense									128.4		128.4
Purchase Accounting Pretax Charge Depreciation Expense									6.7
Income (loss) from continuing operations before taxes									(67.9)		10.5
Net income (loss) attributable to Diebold Nixdorf, Incorporated									$ (51.3)		$ 10.5
Domination and Profit and Loss Transfer Agreement [Member] | Diebold Nixdorf AG
Business Acquisition [Line Items]
Business Acquisition, Share Price | € / shares															55.02	€ 55.02
Recurring Cash Compensation Per Share | € / shares															3.13	3.13
Recurring Cash Compensation Per Share Net Of Tax | € / shares															€ 2.82	€ 2.82
Customer Relationships [Member] | Diebold Nixdorf AG
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life									9 years 6 months
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																	687.5
Other intangible assets		687.5			658.5				$ 658.5	687.5		$ 658.5
Trade Names [Member] | Diebold Nixdorf AG
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life									3 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																	30.1
Developed Technology Rights [Member] | Diebold Nixdorf AG
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life									4 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																	107.2
Other intangible assets, net
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life											1 year 8 months
Other intangible assets, net | Diebold Nixdorf AG
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																	$ 6.3
Other intangible assets, net | Diebold Nixdorf AG
Business Acquisition [Line Items]
Other intangible assets		143.6			143.6				$ 143.6	143.6		143.6
2016 Senior Notes [Member]
Business Acquisition [Line Items]
Senior Notes, Noncurrent	$ 400.0										$ 400.0
Measurement Period Adjustment [Member] | Diebold Nixdorf AG
Business Acquisition [Line Items]
Net sales										3.9
Trade receivables		(4.5)								(4.5)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent		5.8								5.8
Other intangible assets		0.0								0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Restructuring Liabilities		8.2								8.2
Measurement Period Adjustment [Member] | Customer Relationships [Member] | Diebold Nixdorf AG
Business Acquisition [Line Items]
Other intangible assets		29.0								29.0
Measurement Period Adjustment [Member] | Other intangible assets, net | Diebold Nixdorf AG
Business Acquisition [Line Items]
Other intangible assets		0.0								0.0
Measurement Period January 1 To September 30 [Member] | Diebold Nixdorf AG
Business Acquisition [Line Items]
Inventories		10.9								10.9
Deferred income taxes		5.8								5.8
Prepaid expenses		(0.3)								(0.3)
Current assets held for sale		0.0								0.0
Other current assets		(0.3)								(0.3)
Property, plant and equipment		(10.5)								(10.5)
Other assets		0.0								0.0
Total assets acquired		30.1								30.1
Notes payable		0.0								0.0
Accounts payable		0.0								0.0
Deferred revenue		19.6								19.6
Payroll and other benefits liabilities		(7.3)								(7.3)
Current liabilities held for sale		0.0								0.0
Other current liabilities		5.9								5.9
Pensions and other benefits		0.0								0.0
Other noncurrent liabilities		9.0								9.0
Total liabilities assumed		27.2								27.2
Redeemable noncontrolling interests		0.0								0.0
Fair value of noncontrolling interest		0.0								0.0
Total identifiable net assets acquired, including noncontrolling interest		2.9								2.9
Business Combination Consideration Transferred Net Of Cash Acquired		0.0								0.0
Goodwill		(2.9)								(2.9)
Property, Plant and Equipment [Member] | Measurement Period Adjustment [Member]
Business Acquisition [Line Items]
Total cost of sales		$ 4.9
Selling, General and Administrative Expense										0.2
Finite-Lived Intangible Assets [Member] | Measurement Period Adjustment [Member]
Business Acquisition [Line Items]
Selling, General and Administrative Expense										$ 0.8
Assets held in rabbi trust [Member] | Fair Value, Measurements, Recurring
Business Acquisition [Line Items]
Fair Value Of Assets Held Under Trust	9.4				8.5				8.5		9.4	8.5
Level 2 | Assets held in rabbi trust [Member] | Fair Value, Measurements, Recurring
Business Acquisition [Line Items]
Fair Value Of Assets Held Under Trust	$ 0.0				$ 0.0				$ 0.0		$ 0.0	$ 0.0