FRESH START ACCOUNTING - Balance Sheet (Details) - USD ($) $ in Millions		5 Months Ended	7 Months Ended	12 Months Ended
	Aug. 11, 2023	Dec. 31, 2023	Aug. 12, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents		$ 550.2	$ 391.4	$ 550.2	$ 307.4
Restricted cash			60.8
Short-term investments		13.4	13.9	13.4	24.6
Trade Receivables		721.8	623.9	721.8	612.2	$ 595.2
Inventories		589.8	745.6	589.8	588.1
Prepaid expenses		44.0	45.6	44.0	50.5
Current assets held for sale		0.0	9.9	0.0	7.9
Other current assets		192.6	247.8	192.6	168.5
Total current assets		2,153.9	2,138.9	2,153.9	1,770.9
Securities and other investments		6.5	7.0	6.5	7.6
Property, plant and equipment, net		159.0	166.5	159.0	120.7
Deferred income taxes		71.4	59.5	71.4	0.0
Goodwill		616.7	621.0	616.7	702.3	743.6
Intangible assets, net		891.3		891.3	257.6
Other assets		164.5	266.3	164.5	97.4
Total assets	$ 4,178.6	4,162.0	4,178.6	4,162.0	3,065.0
Current liabilities
Notes payable		0.3	4.9	0.3	24.0
Accounts payable		529.0	461.0	529.0	611.6
Deferred revenue		376.2	421.0	376.2	453.2	322.4
Payroll and other benefits liabilities		160.1	159.1	160.1	107.9
Current liabilities held for sale		0.0	10.9	0.0	6.8
DIP facility			0.0
Other current liabilities		315.8	350.3	315.8	362.4
Total current liabilities		1,421.0	1,407.2	1,421.0	1,604.9
Long-term debt		1,252.4	1,253.7	1,252.4	2,585.8
Pensions, post-retirement and other benefits		112.6	102.0	112.6	40.6
Deferred income taxes	238.5	204.9	238.5	204.9	96.6
Other liabilities		26.8	124.3	26.8	31.5
Total liabilities subject to compromise			0.0
Total liabilities		3,082.8	3,125.7	3,082.8	4,436.1
Diebold Nixdorf, Incorporated shareholders' equity
Common stock, value, issued		0.4	0.4	0.4	119.8
Additional paid-in-capital		1,038.7	1,038.6	1,038.7	831.5
Retained earnings (accumulated deficit)		17.1	0.0	17.1	(1,406.7)
Treasury shares, at cost		0.0	0.0	0.0	(585.6)
Accumulated other comprehensive loss		7.6	0.0	7.6	(360.0)
Equity warrants		0.0	0.0	0.0	20.1
Total Diebold Nixdorf, Incorporated shareholders' equity		1,063.8	1,039.0	1,063.8	(1,380.9)
Noncontrolling interests	13.9	15.4	13.9	15.4	9.8
Total equity		1,079.2	1,052.9	1,079.2	(1,371.1)	(837.0)	$ (831.7)
Total liabilities and equity		4,162.0	4,178.6	4,162.0	3,065.0
Changes in Cash and Cash Equivalents
Net change in cash and cash equivalents		139.4	131.0		(70.1)	$ 64.8
Changes in Other Current Liabilities
Debt conversion amount				1,250.0
Unamortized debt issuance expense		1.3		1.3
Liabilities Subject to Compromise
Lease liability		(104.7)		(104.7)
Total liabilities subject to compromise			0.0
Change in Predecessor paid-in-Capital
Acceleration of Predecessor equity awards			2.8
Inventory, Net [Abstract]
Raw materials and work in process, net			226.4
Finished goods, net		242.0	347.3	242.0	229.4
Service parts		173.8	171.9	173.8	158.1
Inventories		589.8	745.6	589.8	588.1
Property, Plant and Equipment
Total property, plant and equipment, at cost		173.3	166.5	173.3	600.1
Less accumulated depreciation and amortization		(14.3)	0.0	(14.3)	(479.4)
Property, plant and equipment, net		159.0	166.5	159.0	120.7
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost			365.1
Less accumulated amortization		(38.9)	0.0	(38.9)	(747.3)
Total intangibles, net		891.3	365.1	891.3
Other Assets [Abstract]
Cloud projects, at cost			19.9
Less accumulated depreciation and amortization			0.0
Cloud projects, net			19.9
Right-of-use operating lease assets		98.7	102.2	98.7	108.5
Right-of-use finance lease assets		6.9	8.7	6.9	10.3
Joint ventures			30.3
Pensions, post-retirement and other benefits			71.3
Other assets			33.9
Total other assets		$ 164.5	$ 266.3	$ 164.5	$ 97.4
Finance lease, right-of-use assets, location		Total other assets	Total other assets	Total other assets	Total other assets
Operating lease liability, current		$ 39.6		$ 39.6	$ 39.0
Finance lease, liability, current		3.7		3.7	4.1
Finance lease, liability, noncurrent		3.6		3.6	5.7
Long-term operating lease liabilities		65.1		65.1	76.7
Retained Earnings (Accumulated Deficit) [Abstract]
Long-term debt		(1,253.9)		(1,253.9)	(2,557.6)
First Lien Claims and Second Lien Notes
Change in Predecessor paid-in-Capital
Change in Predecessor paid-in-capital		654.3		654.3
DIP Facility
Change in Predecessor paid-in-Capital
Change in Predecessor paid-in-capital		384.3		384.3
Customer relationships, net
Current assets
Intangible assets, net		543.0	$ 554.3	543.0	213.6
Other intangible assets, net
Current assets
Intangible assets, net		348.3	365.1	348.3	44.0
Finite-Lived Intangible Assets, Net [Abstract]
Less accumulated amortization		(26.4)		(26.4)	(298.6)
Capitalized software development
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost			13.8
Development costs non-software
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost			32.2
Tradenames and trademarks
Current assets
Intangible assets, net		116.2		116.2	0.0
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost			118.6
Less accumulated amortization		(2.6)		(2.6)	0.0
Technology know-how
Current assets
Intangible assets, net		180.8		180.8	0.0
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost			160.8
Less accumulated amortization		(12.5)		(12.5)	(48.7)
Other intangibles
Current assets
Intangible assets, net		30.4		30.4	1.5
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost			39.7
Less accumulated amortization		(10.2)		(10.2)	(47.2)
Products
Current assets
Inventories			573.7
Inventory, Net [Abstract]
Inventories			573.7
Land and land improvements
Property, Plant and Equipment
Total property, plant and equipment, at cost		21.6	21.5	21.6	10.0
Buildings and building improvements
Property, Plant and Equipment
Total property, plant and equipment, at cost		48.0	42.3	48.0	68.3
Leasehold improvements
Property, Plant and Equipment
Total property, plant and equipment, at cost		6.6	6.1	6.6	17.2
Computer equipment
Property, Plant and Equipment
Total property, plant and equipment, at cost		17.1	16.1	17.1	101.1
Computer software
Property, Plant and Equipment
Total property, plant and equipment, at cost			5.9
Furniture and fixtures
Property, Plant and Equipment
Total property, plant and equipment, at cost		18.0	17.3	18.0	54.6
Tooling
Property, Plant and Equipment
Total property, plant and equipment, at cost		11.7	11.1	11.7	134.7
Machinery, tools and equipment
Property, Plant and Equipment
Total property, plant and equipment, at cost			32.4
Construction in progress
Property, Plant and Equipment
Total property, plant and equipment, at cost		9.4	$ 13.8	9.4	$ 4.6
Predecessor
Current assets
Cash and cash equivalents	404.9
Restricted cash	60.8
Short-term investments	13.9
Trade Receivables	623.9
Inventories	712.8
Prepaid expenses	49.1
Current assets held for sale	9.9
Other current assets	247.8
Total current assets	2,123.1
Securities and other investments	7.0
Property, plant and equipment, net	120.3
Deferred income taxes	0.0
Goodwill	714.3
Other assets	256.8
Total assets	3,442.7
Current liabilities
Notes payable	1,254.9
Accounts payable	461.0
Deferred revenue	421.0
Payroll and other benefits liabilities	159.2
Current liabilities held for sale	10.2
DIP facility	384.4
Other current liabilities	343.3
Total current liabilities	3,034.0
Long-term debt	4.2
Pensions, post-retirement and other benefits	102.3
Deferred income taxes	85.8
Other liabilities	120.3
Total liabilities subject to compromise	2,232.4
Total liabilities	5,579.0
Diebold Nixdorf, Incorporated shareholders' equity
Common stock, value, issued	121.2
Additional paid-in-capital	832.3
Retained earnings (accumulated deficit)	(2,204.8)
Treasury shares, at cost	(586.4)
Accumulated other comprehensive loss	(320.0)
Equity warrants	20.1
Total Diebold Nixdorf, Incorporated shareholders' equity	(2,137.6)
Noncontrolling interests	1.3
Total equity	(2,136.3)
Total liabilities and equity	3,442.7
Liabilities Subject to Compromise
Total liabilities subject to compromise	(2,232.4)
Inventory, Net [Abstract]
Raw materials and work in process, net	232.7
Finished goods, net	308.2
Service parts	171.9
Inventories	712.8
Property, Plant and Equipment
Total property, plant and equipment, at cost	621.1
Less accumulated depreciation and amortization	(500.8)
Property, plant and equipment, net	120.3
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost	362.6
Less accumulated amortization	(317.5)
Total intangibles, net	45.1
Other Assets [Abstract]
Cloud projects, at cost	25.6
Less accumulated depreciation and amortization	(5.3)
Cloud projects, net	20.3
Right-of-use operating lease assets	89.6
Right-of-use finance lease assets	7.9
Joint ventures	33.7
Pensions, post-retirement and other benefits	71.4
Other assets	33.9
Total other assets	256.8
Predecessor | Customer relationships, net
Current assets
Intangible assets, net	176.1
Predecessor | Other intangible assets, net
Current assets
Intangible assets, net	45.1
Predecessor | Capitalized software development
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost	260.4
Predecessor | Development costs non-software
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost	50.4
Predecessor | Tradenames and trademarks
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost	0.0
Predecessor | Technology know-how
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost	0.0
Predecessor | Other intangibles
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost	51.8
Predecessor | Products
Current assets
Inventories	540.9
Inventory, Net [Abstract]
Inventories	540.9
Predecessor | Land and land improvements
Property, Plant and Equipment
Total property, plant and equipment, at cost	10.4
Predecessor | Buildings and building improvements
Property, Plant and Equipment
Total property, plant and equipment, at cost	70.5
Predecessor | Leasehold improvements
Property, Plant and Equipment
Total property, plant and equipment, at cost	17.4
Predecessor | Computer equipment
Property, Plant and Equipment
Total property, plant and equipment, at cost	105.1
Predecessor | Computer software
Property, Plant and Equipment
Total property, plant and equipment, at cost	128.7
Predecessor | Furniture and fixtures
Property, Plant and Equipment
Total property, plant and equipment, at cost	55.9
Predecessor | Tooling
Property, Plant and Equipment
Total property, plant and equipment, at cost	137.5
Predecessor | Machinery, tools and equipment
Property, Plant and Equipment
Total property, plant and equipment, at cost	83.4
Predecessor | Construction in progress
Property, Plant and Equipment
Total property, plant and equipment, at cost	12.2
Reorganization Adjustments
Current assets
Cash and cash equivalents	(13.5)
Restricted cash	0.0
Short-term investments	0.0
Trade Receivables	0.0
Inventories	0.0
Prepaid expenses	(3.5)
Current assets held for sale	0.0
Other current assets	0.0
Total current assets	(17.0)
Securities and other investments	0.0
Property, plant and equipment, net	0.0
Deferred income taxes	70.3
Goodwill	0.0
Other assets	0.0
Total assets	53.3
Current liabilities
Notes payable	(1,250.0)
Accounts payable	0.0
Deferred revenue	0.0
Payroll and other benefits liabilities	(0.1)
Current liabilities held for sale	0.0
DIP facility	(384.4)
Other current liabilities	5.5
Total current liabilities	(1,629.0)
Long-term debt	1,248.7
Pensions, post-retirement and other benefits	0.0
Deferred income taxes	(26.4)
Other liabilities	0.0
Total liabilities subject to compromise	(2,232.4)
Total liabilities	(2,639.1)
Diebold Nixdorf, Incorporated shareholders' equity
Common stock, value, issued	(121.2)
Additional paid-in-capital	(442.3)
Retained earnings (accumulated deficit)	1,659.4
Treasury shares, at cost	586.4
Accumulated other comprehensive loss	(8.8)
Equity warrants	(20.1)
Total Diebold Nixdorf, Incorporated shareholders' equity	2,692.4
Noncontrolling interests	0.0
Total equity	2,692.4
Total liabilities and equity	53.3
Changes in Cash and Cash Equivalents
Payment of interest on the DIP Facility	(1.8)
Payment to holders of the 2024 Stub Unsecured Notes Claims	(3.5)
Payment of lease rejection damages	(3.8)
Payment of professional fees	(4.4)
Net change in cash and cash equivalents	(13.5)
Changes in Other Current Liabilities
Accrual of professional fees	6.3
Accrual of German transfer tax	5.0
Accrual of deferred financing fees	1.3
Cancellation of unvested Predecessor stock compensation awards	(0.9)
Payment of interest on the DIP Facility	(1.8)
Payment of professional fees	(4.4)
Net change in other current liabilities	5.5
Liabilities Subject to Compromise
Debt subject to compromise	2,160.5
Accrued interest on debt subject to compromise	68.1
Lease liability	3.8
Total liabilities subject to compromise	2,232.4
Less: Distribution of common stock to holders of First Lien Claims and Second Lien Notes Claims	(654.6)
Less: Payment to holders of the 2024 Stub Unsecured Notes Claims	(3.5)
Less: Payment of lease rejection damages	(3.8)
Gain on Settlement of Liabilities Subject to Compromise	1,570.5
Change in Predecessor paid-in-Capital
Cancellation of Predecessor common shares at par value	121.2
Cancellation of Predecessor equity warrants	20.1
Acceleration of Predecessor equity awards	2.8
Cancellation of Predecessor treasury stock, at cost	(586.4)
Gain on Settlement of Liabilities Subject to Compromise	1,570.5
Inventory, Net [Abstract]
Inventories	0.0
Property, Plant and Equipment
Property, plant and equipment, net	0.0
Other Assets [Abstract]
Total other assets	0.0
Reorganization Adjustments | Customer relationships, net
Current assets
Intangible assets, net	0.0
Reorganization Adjustments | Other intangible assets, net
Current assets
Intangible assets, net	0.0
Net deferred tax impacts on the effectiveness of the Plans
Diebold Nixdorf, Incorporated shareholders' equity
Retained earnings (accumulated deficit)	96.7
Elimination of unvested Predecessor stock compensation awards (liability classified)
Diebold Nixdorf, Incorporated shareholders' equity
Retained earnings (accumulated deficit)	0.8
Accrual of professional fees
Diebold Nixdorf, Incorporated shareholders' equity
Retained earnings (accumulated deficit)	(6.3)
Elimination of prepaid directors and officers insurance policies related to the Predecessor
Diebold Nixdorf, Incorporated shareholders' equity
Retained earnings (accumulated deficit)	(3.5)
Acceleration of the vesting of Predecessor equity awards upon the Effective Date
Diebold Nixdorf, Incorporated shareholders' equity
Retained earnings (accumulated deficit)	(2.6)
Elimination of accumulated other comprehensive income related to interest rate swaps
Diebold Nixdorf, Incorporated shareholders' equity
Retained earnings (accumulated deficit)	8.8
Accrual of German transfer tax
Diebold Nixdorf, Incorporated shareholders' equity
Retained earnings (accumulated deficit)	(5.0)
Reorganization, Plan Effect Adjustment, First Lien Claims and Second Lien Notes Claims
Diebold Nixdorf, Incorporated shareholders' equity
Common stock, value, issued	0.3
Reorganization, Plan Effect Adjustment, DIP Facility Premiums
Diebold Nixdorf, Incorporated shareholders' equity
Common stock, value, issued	0.1
Fresh Start Accounting Adjustments
Current assets
Cash and cash equivalents	0.0
Restricted cash	0.0
Short-term investments	0.0
Trade Receivables	0.0
Inventories	32.8
Prepaid expenses	0.0
Current assets held for sale	0.0
Other current assets	0.0
Total current assets	32.8
Securities and other investments	0.0
Property, plant and equipment, net	46.2
Deferred income taxes	(10.8)
Goodwill	(93.3)
Other assets	9.5
Total assets	682.6
Current liabilities
Notes payable	0.0
Accounts payable	0.0
Deferred revenue	0.0
Payroll and other benefits liabilities	0.0
Current liabilities held for sale	0.7
DIP facility	0.0
Other current liabilities	1.5
Total current liabilities	2.2
Long-term debt	0.8
Pensions, post-retirement and other benefits	(0.3)
Deferred income taxes	179.1
Other liabilities	4.0
Total liabilities subject to compromise	0.0
Total liabilities	185.8
Diebold Nixdorf, Incorporated shareholders' equity
Additional paid-in-capital	(390.0)
Retained earnings (accumulated deficit)	545.4
Treasury shares, at cost	0.0
Accumulated other comprehensive loss	328.8
Equity warrants	0.0
Total Diebold Nixdorf, Incorporated shareholders' equity	484.2
Noncontrolling interests	12.6
Total equity	496.8
Total liabilities and equity	682.6
Liabilities Subject to Compromise
Total liabilities subject to compromise	0.0
Inventory, Net [Abstract]
Inventories	32.8
Property, Plant and Equipment
Property, plant and equipment, net	46.2
Finite-Lived Intangible Assets, Net [Abstract]
Total intangibles, net	378.2
Other Assets [Abstract]
Total other assets	9.5
Operating lease liability, current		0.8		0.8
Finance lease, liability, current		0.7		0.7
Finance lease, liability, noncurrent		0.8		0.8
Long-term operating lease liabilities		$ 6.2		6.2
Fair value change in other liabilities				$ 2.2
Retained Earnings (Accumulated Deficit) [Abstract]
Other intangible assets	320.0
Other assets fair value adjustments	9.5
Long-term debt	(0.8)
Fresh start valuation gain	686.7
Deferred income taxes	(189.9)
Fresh Start Accounting Adjustments | Customer relationships, net
Current assets
Intangible assets, net	378.2
Fresh Start Accounting Adjustments | Other intangible assets, net
Current assets
Intangible assets, net	$ 320.0