Supplemental Guarantor Information Supplemental Guarantor Information (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Cash and cash equivalents	$ 748.2		$ 313.6	$ 202.4	$ 202.4	$ 326.1
Restricted cash	0.0
Short-term investments	39.9		39.9
Trade receivables, net	1,029.2		413.9
Intercompany receivables	0.0		0.0
Inventories	887.5		369.3
Deferred income taxes	162.9		168.8
Prepaid expenses	62.7		23.6
Prepaid income taxes	108.3		18.0
Current assets held for sale	0.0		148.2
Other current assets	257.2		148.3
Total current assets	3,295.9		1,643.6
Long-term Investments	83.4		85.2
Property, plant and equipment, net	410.8		175.3
Goodwill	991.0		161.5			138.1
Deferred income taxes	67.4		65.3
Finance lease receivables	30.1		36.5
Intangible assets, net	869.7		67.5
Other assets	33.0		7.5
Assets	5,781.3		2,242.4
Liabilities, Current [Abstract]
Notes payable	336.4		32.0
Accounts payable	698.2		281.7
Intercompany payable	0.0		0.0
Deferred revenue	312.7		229.2
Payroll and other benefits liabilities	274.4		76.5
Current liabilities held for sale	0.0		49.4
Other current liabilities	560.6		287.0
Total current liabilities	2,182.3		955.8
Long-term debt	1,722.5		606.2
Pensions and other benefits	296.8		195.6
Post-retirement and other benefits	19.8		18.7
Deferred income taxes	259.8		1.9
Other long-term liabilities	153.3		28.7
Commitments and contingencies
Total Diebold, Incorporated shareholders' equity	736.2	$ 578.3	412.4	401.4	465.6	531.6
Noncontrolling interests	410.6	$ 23.7	23.1	25.1	$ 24.6	23.3
Total liabilities and equity	5,781.3		2,242.4
Parent Company [Member]
Cash and cash equivalents	344.0		20.3	4.9		14.7
Short-term investments	0.0		0.0
Trade receivables, net	186.5		140.4
Intercompany receivables	891.1		828.8
Inventories	126.5		115.9
Deferred income taxes	52.6		103.7
Prepaid expenses	14.3		16.4
Prepaid income taxes	20.9		0.0
Current assets held for sale			139.2
Other current assets	4.5		15.5
Total current assets	1,640.4		1,380.2
Long-term Investments	83.4		85.2
Property, plant and equipment, net	106.2		121.1
Goodwill	55.5		45.1
Deferred income taxes	53.1		57.1
Finance lease receivables	0.0		0.0
Intangible assets, net	1.9		2.4
Other assets	2,756.6		1,404.6
Assets	4,697.1		3,095.7
Liabilities, Current [Abstract]
Notes payable	239.7		21.5
Accounts payable	114.6		131.9
Intercompany payable	1,410.4		1,414.2
Deferred revenue	73.3		102.7
Payroll and other benefits liabilities	24.3		25.2
Current liabilities held for sale			48.9
Other current liabilities	157.4		116.3
Total current liabilities	2,019.7		1,860.7
Long-term debt	1,720.3		604.6
Pensions and other benefits	191.5		193.5
Post-retirement and other benefits	15.1		14.5
Deferred income taxes	2.8		0.0
Other long-term liabilities	11.5		10.0
Total Diebold, Incorporated shareholders' equity	736.2		412.4
Noncontrolling interests	0.0		0.0
Total liabilities and equity	4,697.1		3,095.7
Guarantor Subsidiaries [Member]
Cash and cash equivalents	2.6		7.9	11.8		2.5
Short-term investments	0.0		0.0
Trade receivables, net	0.5		4.3
Intercompany receivables	777.7		733.6
Inventories	15.9		17.8
Deferred income taxes	11.2		11.2
Prepaid expenses	1.0		0.7
Prepaid income taxes	5.5		0.0
Current assets held for sale			0.0
Other current assets	2.0		3.5
Total current assets	816.4		779.0
Long-term Investments	0.0		0.0
Property, plant and equipment, net	8.8		10.0
Goodwill	0.0		0.0
Deferred income taxes	(6.4)		(6.4)
Finance lease receivables	5.8		8.1
Intangible assets, net	19.4		23.3
Other assets	0.2		0.2
Assets	844.2		814.2
Liabilities, Current [Abstract]
Notes payable	1.7		1.3
Accounts payable	0.2		1.2
Intercompany payable	163.5		140.8
Deferred revenue	1.7		3.6
Payroll and other benefits liabilities	1.0		0.5
Current liabilities held for sale			0.0
Other current liabilities	1.1		(5.4)
Total current liabilities	169.2		142.0
Long-term debt	0.5		1.6
Pensions and other benefits	0.0		0.0
Post-retirement and other benefits	0.0		0.0
Deferred income taxes	0.0		0.0
Other long-term liabilities	0.0		0.0
Total Diebold, Incorporated shareholders' equity	674.5		670.6
Noncontrolling interests	0.0		0.0
Total liabilities and equity	844.2		814.2
Non-Guarantor Subsidiaries [Member]
Cash and cash equivalents	401.6		285.4	185.7		308.9
Short-term investments	39.9		39.9
Trade receivables, net	842.2		269.2
Intercompany receivables	518.0		539.1
Inventories	745.1		235.6
Deferred income taxes	99.1		53.9
Prepaid expenses	47.4		6.5
Prepaid income taxes	81.9		18.0
Current assets held for sale			9.0
Other current assets	250.7		129.3
Total current assets	3,025.9		1,585.9
Long-term Investments	0.0		0.0
Property, plant and equipment, net	295.8		44.2
Goodwill	935.5		116.4
Deferred income taxes	20.7		14.6
Finance lease receivables	24.3		28.4
Intangible assets, net	848.4		41.8
Other assets	29.8		(7.3)
Assets	5,180.4		1,824.0
Liabilities, Current [Abstract]
Notes payable	95.0		9.2
Accounts payable	583.4		148.6
Intercompany payable	612.9		546.5
Deferred revenue	237.7		122.9
Payroll and other benefits liabilities	249.1		50.8
Current liabilities held for sale			0.5
Other current liabilities	402.1		176.1
Total current liabilities	2,180.2		1,054.6
Long-term debt	1.7		0.0
Pensions and other benefits	105.3		2.1
Post-retirement and other benefits	4.7		4.2
Deferred income taxes	257.0		1.9
Other long-term liabilities	141.8		18.7
Total Diebold, Incorporated shareholders' equity	2,079.1		719.4
Noncontrolling interests	410.6		23.1
Total liabilities and equity	5,180.4		1,824.0
Reclassifications And 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		0.0
Intercompany receivables	(2,186.8)		(2,101.5)
Inventories	0.0		0.0
Deferred income taxes	0.0		0.0
Prepaid expenses	0.0		0.0
Prepaid income taxes	0.0		0.0
Current assets held for sale			0.0
Other current assets	0.0		0.0
Total current assets	(2,186.8)		(2,101.5)
Long-term 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
Other assets	(2,753.6)		(1,390.0)
Assets	(4,940.4)		(3,491.5)
Liabilities, Current [Abstract]
Notes payable	0.0		0.0
Accounts payable	0.0		0.0
Intercompany payable	(2,186.8)		(2,101.5)
Deferred revenue	0.0		0.0
Payroll and other benefits liabilities	0.0		0.0
Current liabilities held for sale			0.0
Other current liabilities	0.0		0.0
Total current liabilities	(2,186.8)		(2,101.5)
Long-term debt	0.0		0.0
Pensions and other benefits	0.0		0.0
Post-retirement and other benefits	0.0		0.0
Deferred income taxes	0.0		0.0
Other long-term liabilities	0.0		0.0
Total Diebold, Incorporated shareholders' equity	(2,753.6)		(1,390.0)
Noncontrolling interests	0.0		0.0
Total liabilities and equity	$ (4,940.4)		$ (3,491.5)