Fresh Start Accounting - Balance Sheet (Details) - USD ($) $ in Millions			1 Months Ended	2 Months Ended	7 Months Ended	9 Months Ended
	Aug. 12, 2023	Aug. 11, 2023	Aug. 11, 2023	Sep. 30, 2023	Aug. 11, 2023	Sep. 30, 2022	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 391.4	$ 391.4	$ 391.4	$ 376.1	$ 391.4	$ 128.4			$ 307.4
Restricted cash	60.8	60.8	60.8	64.2	60.8	0.0			11.7
Short-term investments	13.9			16.6					24.6
Trade receivables, less allowances for doubtful accounts of $1.0 and $34.5, respectively	623.9			703.8					612.2
Inventories	745.6			666.2					588.1
Prepaid expenses	45.6			46.9					50.5
Current assets held for sale	9.9			0.0					7.9
Other current assets	247.8			207.0					168.5
Total current assets	2,138.9			2,080.8					1,770.9
Securities and other investments	7.0			5.8					7.6
Total property, plant, and equipment, net	166.5			159.0					120.7
Deferred income taxes	59.5			36.6					0.0
Goodwill	621.0			596.7					702.3
Intangible assets, net				884.1					257.6
Other assets	266.3			256.6					205.9
Total assets	4,178.6	4,178.6	4,178.6	4,019.6	4,178.6				3,065.0
Current liabilities
Notes payable	4.9			5.1					24.0
Accounts payable	461.0			528.9					611.6
Deferred revenue	421.0			351.5					453.2
Payroll and other benefits liabilities	159.1			137.0					107.9
Current liabilities held for sale	10.9			0.0					6.8
DIP facility premium	0.0
Other current liabilities	350.3			391.2					401.4
Total current liabilities	1,407.2			1,413.7					1,604.9
Long-term debt	1,253.7			1,253.1					2,585.8
Pensions, post-retirement and other benefits	102.0			98.2					40.6
Deferred income taxes	238.5	238.5	238.5	166.2	238.5				96.6
Other liabilities	124.3			96.9					108.2
Liabilities subject to compromise	0.0
Liabilities, Total	3,125.7			3,028.1					4,436.1
Diebold Nixdorf, Incorporated shareholders' equity
Common stock	0.4			0.4
Additional capital	1,038.6			1,038.6					831.5
Accumulated deficit	0.0			(26.5)					(1,406.7)
Treasury shares, at cost	0.0			0.0					(585.6)
Accumulated other comprehensive loss	0.0	0.0	0.0	(35.8)	0.0	(436.8)	$ (327.5)	$ (353.7)	(360.0)	$ (412.2)	$ (365.4)	$ (378.5)
Equity warrants	0.0			0.0			20.1	20.1	20.1		0.0	0.0
Total Diebold Nixdorf, Incorporated shareholders' equity (deficit)	1,039.0			976.7					(1,380.9)
Noncontrolling interests	13.9	13.9	13.9	14.8	13.9				9.8
Total equity	1,052.9	1,052.9	1,052.9	991.5	1,052.9	(1,317.7)	(2,130.6)	(1,473.6)	(1,371.1)	$ (1,247.2)	(1,008.6)	(837.0)
Total liabilities and equity (deficit)	4,178.6			4,019.6					3,065.0
Changes in Cash and Cash Equivalents
Net change in cash and cash equivalents				(12.6)	131.0	$ (262.6)
Liabilities Subject to Compromise
Lease liability				(105.7)
Liabilities subject to compromise	0.0
Gain on settlement of liabilities subject to compromise (non-cash)			(1,570.5)	0.0	1,570.5
Change in Predecessor paid-in-Capital
Common Stock, Value, Issued	0.4			0.4
Equity warrants	0.0			0.0			$ 20.1	$ 20.1	20.1		$ 0.0	$ 0.0
Treasury Stock, Value	0.0			0.0					585.6
Inventory, Net [Abstract]
Inventory, Work in Process and Raw Materials	226.4
Finished goods	347.3			303.6					229.4
Service parts	171.9			169.8					158.1
Inventories	745.6			666.2					588.1
Property, Plant and Equipment
Total property, plant and equipment, at cost	166.5			167.6					600.1
Less accumulated depreciation and amortization	0.0
Total property, plant, and equipment, net	166.5			159.0					120.7
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost	365.1
Less accumulated amortization	0.0			(13.9)					(747.3)
Total intangibles, net	365.1
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	102.2			98.0
Finance	8.7			7.7
Joint ventures	30.3
Pensions, post-retirement and other benefits	71.3
Other assets	33.9
Total other assets	266.3			256.6					205.9
Other intangible assets, net
Current assets
Intangible assets, net	365.1			351.5					44.0
Finite-Lived Intangible Assets, Net [Abstract]
Less accumulated amortization				(9.5)					(298.6)
Customer relationships, net
Current assets
Intangible assets, net	554.3			532.6					213.6
Finite-Lived Intangible Assets, Net [Abstract]
Less accumulated amortization				(4.4)					(448.7)
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
Trade name/trademark
Current assets
Intangible assets, net				114.9					0.0
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost	118.6
Less accumulated amortization				(0.9)					0.0
Development costs non-software
Current assets
Intangible assets, net				184.1					0.0
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost	160.8
Less accumulated amortization				(4.4)					(48.7)
Other intangibles
Current assets
Intangible assets, net				36.5					1.5
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost	39.7
Less accumulated amortization				(3.4)					(47.2)
Product
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	21.5			20.8					10.0
Buildings and building improvements
Property, Plant and Equipment
Total property, plant and equipment, at cost	42.3
Leasehold improvements
Property, Plant and Equipment
Total property, plant and equipment, at cost	6.1			6.5					17.2
Computer equipment
Property, Plant and Equipment
Total property, plant and equipment, at cost	16.1			17.7					101.1
Furniture and fixtures
Property, Plant and Equipment
Total property, plant and equipment, at cost	17.3			17.4					54.6
Computer software
Property, Plant and Equipment
Total property, plant and equipment, at cost	5.9
Tooling
Property, Plant and Equipment
Total property, plant and equipment, at cost	11.1			10.9					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	$ 13.8			$ 13.0					4.6
Predecessor
Current assets
Cash and cash equivalents		404.9	404.9		404.9				307.4
Restricted cash		60.8	60.8		60.8
Short-term investments		13.9	13.9		13.9
Trade receivables, less allowances for doubtful accounts of $1.0 and $34.5, respectively		623.9	623.9		623.9
Inventories		712.8	712.8		712.8
Prepaid expenses		49.1	49.1		49.1
Current assets held for sale		9.9	9.9		9.9
Other current assets		247.8	247.8		247.8
Total current assets		2,123.1	2,123.1		2,123.1
Securities and other investments		7.0	7.0		7.0
Total property, plant, and equipment, net		120.3	120.3		120.3
Deferred income taxes		0.0	0.0		0.0
Goodwill		714.3	714.3		714.3
Other assets		256.8	256.8		256.8
Total assets		3,442.7	3,442.7		3,442.7
Current liabilities
Notes payable		1,254.9	1,254.9		1,254.9
Accounts payable		461.0	461.0		461.0
Deferred revenue		421.0	421.0		421.0
Payroll and other benefits liabilities		159.2	159.2		159.2
Current liabilities held for sale		10.2	10.2		10.2
DIP facility premium		384.4	384.4		384.4
Other current liabilities		343.3	343.3		343.3
Total current liabilities		3,034.0	3,034.0		3,034.0
Long-term debt		4.2	4.2		4.2
Pensions, post-retirement and other benefits		102.3	102.3		102.3
Deferred income taxes		85.8	85.8		85.8
Other liabilities		120.3	120.3		120.3
Liabilities subject to compromise		2,232.4	2,232.4		2,232.4
Liabilities, Total		5,579.0	5,579.0		5,579.0
Diebold Nixdorf, Incorporated shareholders' equity
Common stock		121.2	121.2		121.2				119.8
Additional capital		832.3	832.3		832.3
Accumulated deficit		(2,204.8)	(2,204.8)		(2,204.8)
Treasury shares, at cost		(586.4)	(586.4)		(586.4)
Accumulated other comprehensive loss		(320.0)	(320.0)		(320.0)
Equity warrants		20.1	20.1		20.1
Total Diebold Nixdorf, Incorporated shareholders' equity (deficit)		(2,137.6)	(2,137.6)		(2,137.6)
Noncontrolling interests		1.3	1.3		1.3
Total equity		(2,136.3)	(2,136.3)		(2,136.3)
Total liabilities and equity (deficit)		3,442.7	3,442.7		3,442.7
Liabilities Subject to Compromise
Liabilities subject to compromise		2,232.4	2,232.4		2,232.4
Change in Predecessor paid-in-Capital
Common Stock, Value, Issued		121.2	121.2		121.2				119.8
Equity warrants		20.1	20.1		20.1
Treasury Stock, Value		586.4	586.4		586.4
Inventory, Net [Abstract]
Inventory, Work in Process and Raw Materials		232.7	232.7		232.7
Finished goods		308.2	308.2		308.2
Service parts		171.9	171.9		171.9
Inventories		712.8	712.8		712.8
Property, Plant and Equipment
Total property, plant and equipment, at cost		621.1	621.1		621.1
Less accumulated depreciation and amortization		(500.8)
Total property, plant, and equipment, net		120.3	120.3		120.3
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost		362.6	362.6		362.6
Less accumulated amortization		(317.5)	(317.5)		(317.5)
Total intangibles, net		45.1	45.1		45.1
Other Assets [Abstract]
Cloud projects, at cost		25.6	25.6		25.6
Less accumulated depreciation and amortization		(5.3)	(5.3)		(5.3)
Cloud projects, net		20.3	20.3		20.3
Right-of-use operating lease assets		89.6	89.6		89.6				108.5
Finance		7.9	7.9		7.9				$ 10.3
Joint ventures		33.7	33.7		33.7
Pensions, post-retirement and other benefits		71.4	71.4		71.4
Other assets		33.9	33.9		33.9
Total other assets		256.8	256.8		256.8
Predecessor | Other intangible assets, net
Current assets
Intangible assets, net		45.1	45.1		45.1
Predecessor | Customer relationships, net
Current assets
Intangible assets, net		176.1	176.1		176.1
Predecessor | Capitalized software development
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost		260.4	260.4		260.4
Predecessor | Development costs non-software
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost		50.4	50.4		50.4
Predecessor | Trade name/trademark
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost		0.0	0.0		0.0
Predecessor | Development costs non-software
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost		0.0	0.0		0.0
Predecessor | Other intangibles
Finite-Lived Intangible Assets, Net [Abstract]
Other intangible assets, at cost		51.8	51.8		51.8
Predecessor | Product
Current assets
Inventories		540.9	540.9		540.9
Inventory, Net [Abstract]
Inventories		540.9	540.9		540.9
Predecessor | Land and land improvements
Property, Plant and Equipment
Total property, plant and equipment, at cost		10.4	10.4		10.4
Predecessor | Buildings and building improvements
Property, Plant and Equipment
Total property, plant and equipment, at cost		70.5	70.5		70.5
Predecessor | Leasehold improvements
Property, Plant and Equipment
Total property, plant and equipment, at cost		17.4	17.4		17.4
Predecessor | Computer equipment
Property, Plant and Equipment
Total property, plant and equipment, at cost		105.1	105.1		105.1
Predecessor | Furniture and fixtures
Property, Plant and Equipment
Total property, plant and equipment, at cost		55.9	55.9		55.9
Predecessor | Computer software
Property, Plant and Equipment
Total property, plant and equipment, at cost		128.7	128.7		128.7
Predecessor | Tooling
Property, Plant and Equipment
Total property, plant and equipment, at cost		137.5	137.5		137.5
Predecessor | Machinery, tools and equipment
Property, Plant and Equipment
Total property, plant and equipment, at cost		83.4	83.4		83.4
Predecessor | Construction in progress
Property, Plant and Equipment
Total property, plant and equipment, at cost		12.2	12.2		12.2
Reorganization Adjustments
Current assets
Cash and cash equivalents		(13.5)	(13.5)		(13.5)
Restricted cash		0.0	0.0		0.0
Short-term investments		0.0	0.0		0.0
Trade receivables, less allowances for doubtful accounts of $1.0 and $34.5, respectively		0.0	0.0		0.0
Inventories		0.0	0.0		0.0
Prepaid expenses		(3.5)	(3.5)		(3.5)
Current assets held for sale		0.0	0.0		0.0
Other current assets		0.0	0.0		0.0
Total current assets		(17.0)	(17.0)		(17.0)
Securities and other investments		0.0	0.0		0.0
Total property, plant, and equipment, net		0.0	0.0		0.0
Deferred income taxes		70.3	70.3		70.3
Goodwill		0.0	0.0		0.0
Total assets		53.3	53.3		53.3
Current liabilities
Notes payable		(1,250.0)	(1,250.0)		(1,250.0)
Accounts payable		0.0	0.0		0.0
Deferred revenue		0.0	0.0		0.0
Payroll and other benefits liabilities		(0.1)	(0.1)		(0.1)
Current liabilities held for sale		0.0	0.0		0.0
DIP facility premium		(384.4)	(384.4)		(384.4)
Other current liabilities		5.5	5.5		5.5
Total current liabilities		(1,629.0)	(1,629.0)		(1,629.0)
Long-term debt		1,248.7	1,248.7		1,248.7
Pensions, post-retirement and other benefits		0.0	0.0		0.0
Deferred income taxes		(26.4)	(26.4)		(26.4)
Other liabilities		0.0	0.0		0.0
Liabilities subject to compromise		(2,232.4)	(2,232.4)		(2,232.4)
Liabilities, Total		(2,639.1)	(2,639.1)		(2,639.1)
Diebold Nixdorf, Incorporated shareholders' equity
Common stock		(121.2)	(121.2)		(121.2)
Additional capital		(442.3)	(442.3)		(442.3)
Accumulated deficit		1,659.4	1,659.4		1,659.4
Treasury Stock, Common, Value		(586.4)	(586.4)		(586.4)
Treasury shares, at cost		586.4	586.4		586.4
Additional Paid in Capital		(442.3)	(442.3)		(442.3)
Accumulated other comprehensive loss		(8.8)	(8.8)		(8.8)
Equity warrants		(20.1)	(20.1)		(20.1)
Total Diebold Nixdorf, Incorporated shareholders' equity (deficit)		2,692.4	2,692.4		2,692.4
Noncontrolling interests		0.0	0.0		0.0
Total equity		2,692.4	2,692.4		2,692.4
Total liabilities and equity (deficit)		53.3	53.3		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)
Professional Fees		(4.4)
Net change in cash and cash equivalents		(13.5)
Changes in Other Current Liabilities
Accrual of professional fees		6.3	6.3		6.3
Accrual of German transfer tax		5.0	5.0		5.0
Accrual of deferred financing fees		1.3	1.3		1.3
Cancellation of unvested Predecessor stock compensation awards		(0.9)
Payment of interest on the DIP Facility		(1.8)
Professional Fees		(4.4)
Net change in other current liabilities		5.5	5.5		5.5
Liabilities Subject to Compromise
Debt subject to compromise		2,160.5	2,160.5		2,160.5
Accrued interest on debt subject to compromise		68.1	68.1		68.1
Lease liability		3.8	3.8		3.8
Liabilities subject to compromise		(2,232.4)	(2,232.4)		(2,232.4)
Less: Distribution of common stock to holders of First Lien Claims and Second Lien Notes Claims		(654.6)
Payment to holders of the 2024 Stub Unsecured Notes Claims		3.5
Payment of lease rejection damages		3.8
Gain on settlement of liabilities subject to compromise (non-cash)		1,570.5
Change in Predecessor paid-in-Capital
Common Stock, Value, Issued		(121.2)	(121.2)		(121.2)
Equity warrants		(20.1)	(20.1)		(20.1)
Accelerated Vesting Of Equity		2.8	2.8		2.8
Treasury Stock, Value		(586.4)	(586.4)		(586.4)
Additional Paid in Capital		(442.3)	(442.3)		(442.3)
Inventory, Net [Abstract]
Inventories		0.0	0.0		0.0
Property, Plant and Equipment
Total property, plant, and equipment, net		0.0	0.0		0.0
Reorganization Adjustments | Other intangible assets, net
Current assets
Intangible assets, net		0.0	0.0		0.0
Other assets		0.0	0.0		0.0
Other Assets [Abstract]
Total other assets		0.0	0.0		0.0
Reorganization Adjustments | Customer relationships, net
Current assets
Intangible assets, net		0.0	0.0		0.0
Fresh Start Accounting Adjustments
Current assets
Cash and cash equivalents		0.0	0.0		0.0
Restricted cash		0.0	0.0		0.0
Short-term investments		0.0	0.0		0.0
Trade receivables, less allowances for doubtful accounts of $1.0 and $34.5, respectively		0.0	0.0		0.0
Inventories		32.8	32.8		32.8
Prepaid expenses		0.0	0.0		0.0
Current assets held for sale		0.0	0.0		0.0
Other current assets		0.0	0.0		0.0
Total current assets		32.8	32.8		32.8
Securities and other investments		0.0	0.0		0.0
Total property, plant, and equipment, net		46.2	46.2		46.2
Deferred income taxes		(10.8)	(10.8)		(10.8)
Goodwill		(93.3)	(93.3)		(93.3)
Other assets		9.5	9.5		9.5
Total assets		682.6	682.6		682.6
Current liabilities
Notes payable		0.0	0.0		0.0
Accounts payable		0.0	0.0		0.0
Deferred revenue		0.0	0.0		0.0
Payroll and other benefits liabilities		0.0	0.0		0.0
Current liabilities held for sale		0.7	0.7		0.7
DIP facility premium		0.0	0.0		0.0
Other current liabilities		1.5	1.5		1.5
Total current liabilities		2.2	2.2		2.2
Long-term debt		0.8	0.8		0.8
Pensions, post-retirement and other benefits		(0.3)	(0.3)		(0.3)
Deferred income taxes		179.1	179.1		179.1
Other liabilities		4.0	4.0		4.0
Liabilities subject to compromise		0.0	0.0		0.0
Liabilities, Total		185.8	185.8		185.8
Diebold Nixdorf, Incorporated shareholders' equity
Additional capital		(390.0)	(390.0)		(390.0)
Accumulated deficit		545.4	545.4		545.4
Treasury shares, at cost		0.0	0.0		0.0
Accumulated other comprehensive loss		328.8	328.8		328.8
Equity warrants		0.0	0.0		0.0
Total Diebold Nixdorf, Incorporated shareholders' equity (deficit)		484.2	484.2		484.2
Noncontrolling interests		12.6	12.6		12.6
Total equity		496.8	496.8		496.8
Total liabilities and equity (deficit)		682.6	682.6		682.6
Liabilities Subject to Compromise
Liabilities subject to compromise		0.0	0.0		0.0
Change in Predecessor paid-in-Capital
Equity warrants		0.0	0.0		0.0
Treasury Stock, Value		0.0	0.0		0.0
Inventory, Net [Abstract]
Inventories		32.8	32.8		32.8
Property, Plant and Equipment
Total property, plant, and equipment, net		46.2	46.2		46.2
Finite-Lived Intangible Assets, Net [Abstract]
Total intangibles, net		378.2	378.2		378.2
Other Assets [Abstract]
Total other assets		9.5	9.5		9.5
Fresh Start Accounting Adjustments | Other intangible assets, net
Current assets
Intangible assets, net		320.0	320.0		320.0
Fresh Start Accounting Adjustments | Customer relationships, net
Current assets
Intangible assets, net		$ 378.2	$ 378.2		$ 378.2