Supplemental Guarantor Information Supplemental Guarantor Information (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Cash and cash equivalents	$ 362.1	$ 535.2	$ 490.1	$ 652.7
Short-term investments	24.2	81.4
Trade receivables, net	852.2	830.1
Intercompany receivables	0.0	0.0
Inventories	831.3	737.0
Prepaid expenses	70.1	65.7
Income taxes	67.0	73.4
Prepaid, income taxes and other current assets	343.7	324.7
Total current assets	2,413.5	2,508.4
Securities and other investments	97.5	96.8
Property, plant and equipment, net	365.5	364.5
Goodwill	1,131.8	1,117.1		998.3
Deferred income taxes	311.7	293.8
Finance lease receivables	13.3	14.4
Intangible assets, net	768.6	773.8
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0.0	0.0
Other assets	89.8	95.8
Assets	5,178.4	5,250.2
Liabilities, Current [Abstract]
Notes payable	76.6	66.7
Accounts payable	560.5	562.2
Intercompany payable	0.0	0.0
Deferred revenue	502.0	437.5
Payroll and other benefits liabilities	175.2	198.9
Other current liabilities	532.9	534.1
Total current liabilities	1,847.2	1,799.4
Long-term debt	1,712.5	1,787.1
Pensions, post-retirement and other benefits	259.8	266.4
Deferred income taxes	285.5	287.1
Other long-term liabilities	646.0	664.8
Commitments and contingencies
Redeemable noncontrolling interests	509.6	492.1	449.9	44.1
Total Diebold Nixdorf, Incorporated shareholders' equity	426.9	470.0	533.1	591.4
Noncontrolling interests	36.2	36.8	34.8	433.4
Total liabilities, redeemable noncontrolling interests and equity	5,178.4	5,250.2
Reportable Legal Entities [Member] | Parent Company [Member]
Cash and cash equivalents	7.2	58.5	18.1	138.4
Short-term investments	0.0	0.0
Trade receivables, net	147.8	140.7
Intercompany receivables	737.9	735.7
Inventories	180.8	167.6
Prepaid, income taxes and other current assets	36.2	35.4
Total current assets	1,109.9	1,137.9
Securities and other investments	97.5	96.8
Property, plant and equipment, net	87.4	89.6
Goodwill	55.5	55.5
Deferred income taxes	167.7	150.8
Intangible assets, net	36.1	37.5
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	2,410.2	2,518.5
Other assets	53.3	47.2
Assets	4,017.6	4,133.8
Liabilities, Current [Abstract]
Notes payable	53.0	49.9
Accounts payable	95.1	88.1
Intercompany payable	1,227.7	1,337.1
Deferred revenue	125.2	115.8
Payroll and other benefits liabilities	22.7	26.1
Other current liabilities	149.5	115.2
Total current liabilities	1,673.2	1,732.2
Long-term debt	1,711.8	1,710.6
Other long-term liabilities	205.7	221.0
Redeemable noncontrolling interests	0.0	0.0
Total Diebold Nixdorf, Incorporated shareholders' equity	426.9	470.0
Noncontrolling interests	0.0	0.0
Total liabilities, redeemable noncontrolling interests and equity	4,017.6	4,133.8
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]
Cash and cash equivalents	2.7	2.3	2.2	2.3
Short-term investments	0.0	0.0
Trade receivables, net	0.5	1.4
Intercompany receivables	820.9	907.8
Inventories	0.0	0.0
Prepaid, income taxes and other current assets	16.1	17.0
Total current assets	840.2	928.5
Securities and other investments	0.0	0.0
Property, plant and equipment, net	1.3	2.1
Goodwill	0.0	0.0
Deferred income taxes	8.0	8.0
Intangible assets, net	0.0	0.0
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0.0	0.0
Other assets	0.7	1.1
Assets	850.2	939.7
Liabilities, Current [Abstract]
Notes payable	0.3	0.3
Accounts payable	0.1	0.1
Intercompany payable	194.6	192.2
Deferred revenue	0.5	0.6
Payroll and other benefits liabilities	0.7	2.2
Other current liabilities	0.5	2.8
Total current liabilities	196.7	198.2
Long-term debt	0.0	0.1
Other long-term liabilities	0.0	0.0
Redeemable noncontrolling interests	0.0	0.0
Total Diebold Nixdorf, Incorporated shareholders' equity	653.5	741.4
Noncontrolling interests	0.0	0.0
Total liabilities, redeemable noncontrolling interests and equity	850.2	939.7
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]
Cash and cash equivalents	352.2	474.4	469.8	512.0
Short-term investments	24.2	81.4
Trade receivables, net	703.9	688.0
Intercompany receivables	2,889.0	2,104.1
Inventories	650.5	569.4
Prepaid, income taxes and other current assets	313.9	294.1
Total current assets	4,933.7	4,211.4
Securities and other investments	0.0	0.0
Property, plant and equipment, net	276.8	272.8
Goodwill	1,076.3	1,061.6
Deferred income taxes	136.0	135.0
Intangible assets, net	732.5	736.3
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0.0	0.0
Other assets	71.2	74.0
Assets	7,226.5	6,491.1
Liabilities, Current [Abstract]
Notes payable	23.3	16.5
Accounts payable	465.3	474.0
Intercompany payable	3,025.5	2,218.3
Deferred revenue	376.3	321.1
Payroll and other benefits liabilities	151.8	170.6
Other current liabilities	405.4	437.9
Total current liabilities	4,447.6	3,638.4
Long-term debt	0.7	76.4
Other long-term liabilities	475.7	470.3
Redeemable noncontrolling interests	509.6	492.1
Total Diebold Nixdorf, Incorporated shareholders' equity	1,756.7	1,777.1
Noncontrolling interests	36.2	36.8
Total liabilities, redeemable noncontrolling interests and equity	7,226.5	6,491.1
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	0.0
Intercompany receivables	(4,447.8)	(3,747.6)
Inventories	0.0	0.0
Prepaid, income taxes and other current assets	(22.5)	(21.8)
Total current assets	(4,470.3)	(3,769.4)
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
Intangible assets, net	0.0	0.0
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	(2,410.2)	(2,518.5)
Other assets	(35.4)	(26.5)
Assets	(6,915.9)	(6,314.4)
Liabilities, Current [Abstract]
Notes payable	0.0	0.0
Accounts payable	0.0	0.0
Intercompany payable	(4,447.8)	(3,747.6)
Deferred revenue	0.0	0.0
Payroll and other benefits liabilities	0.0	0.0
Other current liabilities	(22.5)	(21.8)
Total current liabilities	(4,470.3)	(3,769.4)
Long-term debt	0.0	0.0
Other long-term liabilities	(35.4)	(26.5)
Redeemable noncontrolling interests	0.0	0.0
Total Diebold Nixdorf, Incorporated shareholders' equity	(2,410.2)	(2,518.5)
Noncontrolling interests	0.0	0.0
Total liabilities, redeemable noncontrolling interests and equity	$ (6,915.9)	$ (6,314.4)