STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Millions	Total	Diebold Nixdorf Shareholders' equity	Common stock	Accumulated other comprehensive income	Paid-in-capital	Retained earnings	Treasury shares	Noncontrolling interests
Beginning balance at Dec. 31, 2023			$ 0.4	$ 7.6	$ 1,038.7	$ 17.1	$ 0.0	$ 15.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ (20.9)					(22.1)		1.2
Other comprehensive income	16.8			17.1				(0.3)
Share-based compensation			0.0		7.4
Purchases							0.0
Distributions to non-controlling interest holders, net								(6.6)
Ending balance at Sep. 30, 2024	1,075.9	$ 1,066.2	0.4	24.7	1,046.1	(5.0)	0.0	9.7
Beginning balance at Jun. 30, 2024			0.4	(64.3)	1,043.2	17.4	0.0	12.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(21.7)					(22.4)		0.7
Other comprehensive income	88.9			89.0				(0.1)
Share-based compensation			0.0		2.9
Purchases							0.0
Distributions to non-controlling interest holders, net								(3.2)
Ending balance at Sep. 30, 2024	1,075.9	1,066.2	0.4	24.7	1,046.1	(5.0)	0.0	9.7
Beginning balance at Dec. 31, 2024	938.2		0.4	(117.9)	1,048.4	(1.1)	0.0	8.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	47.0					45.0		2.0
Other comprehensive income	202.4			202.7				(0.3)
Share-based compensation			0.0		9.3
Purchases							(79.6)
Distributions to non-controlling interest holders, net								(4.9)
Ending balance at Sep. 30, 2025	1,112.4	1,107.2	0.4	84.8	1,057.7	43.9	(79.6)	5.2
Beginning balance at Jun. 30, 2025			0.4	79.0	1,054.7	2.8	(39.7)	7.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	41.7					41.1		0.6
Other comprehensive income	5.5			5.8				(0.3)
Share-based compensation			0.0		3.0
Purchases							(39.9)
Distributions to non-controlling interest holders, net								(2.9)
Ending balance at Sep. 30, 2025	$ 1,112.4	$ 1,107.2	$ 0.4	$ 84.8	$ 1,057.7	$ 43.9	$ (79.6)	$ 5.2