Supplemental Guarantor Information Supplemental Guarantor Information (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Cash and cash equivalents	$ 380.7		$ 652.7	$ 748.2		$ 313.6
Short-term investments	64.0		64.1
Trade receivables, net	911.9		835.9
Intercompany receivables	0.0		0.0
Inventories	807.8		737.7
Prepaid expenses	64.5		60.7
Income taxes	132.0		85.2
Other current assets	215.4		183.3
Total current assets	2,576.3		2,619.6
Securities and other investments	92.5		94.7
Property, plant and equipment, net	367.7		387.0
Goodwill	1,105.9		998.3			161.5
Deferred income taxes	338.0		309.5
Finance lease receivables	16.4		25.2
Intangible assets, net	793.5		772.9
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0.0		0.0
Other assets	71.1		63.1
Assets	5,361.4		5,270.3
Liabilities, Current [Abstract]
Notes payable	71.9		106.9
Accounts payable	579.1		560.5
Intercompany payable	0.0		0.0
Deferred revenue	369.4		404.2
Payroll and other benefits liabilities	201.3		172.5
Other current liabilities	536.6		580.4
Total current liabilities	1,758.3		1,824.5
Long-term debt	1,834.5		1,691.4
Pensions, post-retirement and other benefits	281.5		297.2
Deferred income taxes	282.6		300.6
Other liabilities	107.1		87.7
Commitments and contingencies
Redeemable noncontrolling interests	485.7		44.1
Total Diebold Nixdorf, Incorporated shareholders' equity	572.2	$ 587.2	591.4	736.2	$ 578.3	412.4
Noncontrolling interests	39.5	$ 37.5	433.4	410.6	$ 23.7	23.1
Total liabilities, redeemable noncontrolling interests and equity	5,361.4		5,270.3
Reportable Legal Entities [Member] | Parent Company [Member]
Cash and cash equivalents	59.3		138.9	345.7		20.3
Short-term investments	0.0		0.0
Trade receivables, net	167.6		140.1
Intercompany receivables	729.0		883.0
Inventories	187.1		147.9
Prepaid expenses	12.5		15.0
Income taxes	0.0		0.3
Other current assets	16.1		5.1
Total current assets	1,171.6		1,330.3
Securities and other investments	92.5		94.7
Property, plant and equipment, net	89.1		102.9
Goodwill	55.5		55.5
Deferred income taxes	236.8		173.7
Finance lease receivables	3.4		4.8
Intangible assets, net	0.8		1.8
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	2,525.4		2,609.5
Other assets	37.5		7.8
Assets	4,212.6		4,381.0
Liabilities, Current [Abstract]
Notes payable	46.8		30.9
Accounts payable	111.0		109.1
Intercompany payable	1,343.5		1,421.2
Deferred revenue	77.4		122.3
Payroll and other benefits liabilities	28.4		22.9
Other current liabilities	83.7		156.1
Total current liabilities	1,690.8		1,862.5
Long-term debt	1,713.2		1,690.5
Pensions, post-retirement and other benefits	210.7		212.6
Deferred income taxes	13.3		13.4
Other liabilities	12.4		10.6
Redeemable noncontrolling interests	0.0		0.0
Total Diebold Nixdorf, Incorporated shareholders' equity	572.2		591.4
Noncontrolling interests	0.0		0.0
Total liabilities, redeemable noncontrolling interests and equity	4,212.6		4,381.0
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]
Cash and cash equivalents	2.5		2.3	2.6		7.9
Short-term investments	0.0		0.0
Trade receivables, net	1.3		0.0
Intercompany receivables	916.0		783.7
Inventories	0.0		16.2
Prepaid expenses	1.4		1.1
Income taxes	4.1		25.4
Other current assets	1.0		1.6
Total current assets	926.3		830.3
Securities and other investments	0.0		0.0
Property, plant and equipment, net	2.6		9.0
Goodwill	0.0		0.0
Deferred income taxes	7.8		7.8
Finance lease receivables	3.1		4.8
Intangible assets, net	9.3		13.6
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0.0		0.0
Other assets	0.0		0.1
Assets	949.1		865.6
Liabilities, Current [Abstract]
Notes payable	0.4		1.3
Accounts payable	0.5		1.1
Intercompany payable	178.9		175.9
Deferred revenue	0.6		0.7
Payroll and other benefits liabilities	1.6		1.4
Other current liabilities	2.3		3.9
Total current liabilities	184.3		184.3
Long-term debt	0.1		0.4
Pensions, post-retirement and other benefits	0.0		0.0
Deferred income taxes	0.0		0.0
Other liabilities	0.0		0.0
Redeemable noncontrolling interests	0.0		0.0
Total Diebold Nixdorf, Incorporated shareholders' equity	764.7		680.9
Noncontrolling interests	0.0		0.0
Total liabilities, redeemable noncontrolling interests and equity	949.1		865.6
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]
Cash and cash equivalents	318.9		511.5	399.9		285.4
Short-term investments	64.0		64.1
Trade receivables, net	743.0		696.4
Intercompany receivables	2,086.6		497.0
Inventories	620.7		573.6
Prepaid expenses	50.6		44.6
Income taxes	132.8		84.9
Other current assets	204.3		176.6
Total current assets	4,220.9		2,648.7
Securities and other investments	0.0		0.0
Property, plant and equipment, net	276.0		275.1
Goodwill	1,050.4		942.8
Deferred income taxes	93.4		128.0
Finance lease receivables	9.9		15.6
Intangible assets, net	783.4		757.5
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0.0		9.9
Other assets	45.5		55.2
Assets	6,479.5		4,832.8
Liabilities, Current [Abstract]
Notes payable	24.7		74.7
Accounts payable	467.6		450.9
Intercompany payable	2,209.2		566.6
Deferred revenue	291.4		281.2
Payroll and other benefits liabilities	171.3		148.2
Other current liabilities	461.5		445.8
Total current liabilities	3,625.7		1,967.4
Long-term debt	121.2		0.5
Pensions, post-retirement and other benefits	70.8		84.6
Deferred income taxes	269.3		287.2
Other liabilities	115.2		77.1
Redeemable noncontrolling interests	485.7		44.1
Total Diebold Nixdorf, Incorporated shareholders' equity	1,752.1		1,938.5
Noncontrolling interests	39.5		433.4
Total liabilities, redeemable noncontrolling interests and equity	6,479.5		4,832.8
Consolidation, Eliminations [Member]
Cash and cash equivalents	0.0		0.0	$ 0.0		$ 0.0
Short-term investments	0.0		0.0
Trade receivables, net	0.0		(0.6)
Intercompany receivables	(3,731.6)		(2,163.7)
Inventories	0.0		0.0
Prepaid expenses	0.0		0.0
Income taxes	(4.9)		(25.4)
Other current assets	(6.0)		0.0
Total current assets	(3,742.5)		(2,189.7)
Securities and other investments	0.0		0.0
Property, plant and equipment, net	0.0		0.0
Goodwill	0.0		0.0
Deferred income taxes	0.0		0.0
Finance lease receivables	0.0		0.0
Intangible assets, net	0.0		0.0
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	(2,525.4)		(2,619.4)
Other assets	(11.9)		0.0
Assets	(6,279.8)		(4,809.1)
Liabilities, Current [Abstract]
Notes payable	0.0		0.0
Accounts payable	0.0		(0.6)
Intercompany payable	(3,731.6)		(2,163.7)
Deferred revenue	0.0		0.0
Payroll and other benefits liabilities	0.0		0.0
Other current liabilities	(10.9)		(25.4)
Total current liabilities	(3,742.5)		(2,189.7)
Long-term debt	0.0		0.0
Pensions, post-retirement and other benefits	0.0		0.0
Deferred income taxes	0.0		0.0
Other liabilities	(20.5)		0.0
Redeemable noncontrolling interests	0.0		0.0
Total Diebold Nixdorf, Incorporated shareholders' equity	(2,516.8)		(2,619.4)
Noncontrolling interests	0.0		0.0
Total liabilities, redeemable noncontrolling interests and equity	$ (6,279.8)		$ (4,809.1)