Consolidated Statement of Equity - USD ($) shares in Millions, $ in Millions		Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	AOCI*	Noncontrolling Interests
Beginning Balance at Dec. 31, 2021		$ 252.6	$ 47.4	$ 670.6	$ 312.9	$ (907.9)	$ 129.6
Beginning Balance (shares) at Dec. 31, 2021			47.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		181.9			170.6		11.3
Other comprehensive income (loss)		201.0				207.3	(6.3)
Stock Repurchased During Period, Value		(52.2)	$ (1.5)	(22.1)	(28.6)
Stock Repurchased During Period, Shares			(1.5)
Dividends to:
Brink's common shareholders		(37.6)			(37.6)
Noncontrolling interests		(7.1)					(7.1)
Stock options and awards:
Compensation expense		48.6		48.6
Other share-based benefit transactions		(9.4)	$ 0.4	(9.7)	(0.1)
Other share-based benefit transactions (shares)			0.4
Acquisitions of noncontrolling interests	[1]	7.8		3.3		(0.1)	4.6
Acquisitions with noncontrolling interests		0.1					0.1
Capital contributions from noncontrolling interest		0.1					0.1
Ending Balance at Dec. 31, 2022		570.2	$ 46.3	684.1	417.2	(700.5)	123.1
Ending Balance (shares) at Dec. 31, 2022			46.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		98.3			87.7		10.6
Other comprehensive income (loss)		42.2				44.5	(2.3)
Stock Repurchased During Period, Value	[2]	(173.3)	$ (2.3)	(38.9)	(132.1)
Stock Repurchased During Period, Shares	[2]		(2.3)
Dividends to:
Brink's common shareholders		(39.6)			(39.6)
Noncontrolling interests		(7.7)					(7.7)
Stock options and awards:
Compensation expense		32.1		32.1
Other share-based benefit transactions		(1.4)	$ 0.5	(1.7)	(0.2)
Other share-based benefit transactions (shares)			0.5
Acquisitions of noncontrolling interests		0.6		(0.3)		0.0	0.9
Ending Balance at Dec. 31, 2023		520.2	$ 44.5	675.9	333.0	(656.0)	122.8
Ending Balance (shares) at Dec. 31, 2023			44.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		174.7			162.9		11.8
Other comprehensive income (loss)		(148.6)				(148.1)	(0.5)
Stock Repurchased During Period, Value	[2]	(205.2)	$ (2.1)	(34.6)	(168.5)
Stock Repurchased During Period, Shares	[2]		(2.1)
Dividends to:
Brink's common shareholders		(41.8)			(41.8)
Noncontrolling interests		(6.1)					(6.1)
Stock options and awards:
Compensation expense		36.5		36.5
Other share-based benefit transactions		(17.0)	$ 0.5	(17.3)	(0.2)
Other share-based benefit transactions (shares)			0.5
Acquisitions of noncontrolling interests		(0.2)		0.2		0.0	(0.4)
Ending Balance at Dec. 31, 2024		$ 312.5	$ 42.9	$ 660.7	$ 285.4	$ (804.1)	$ 127.6
Ending Balance (shares) at Dec. 31, 2024			42.9

[1] This amount represents the impact of transactions in which we acquired or disposed of noncontrolling ownership interests in certain companies where we had an existing controlling interest prior to and after the related acquisition or disposal transactions.

[2] Amounts do not agree to cash paid to repurchase shares in the consolidated statements of cash flows or Note 19. The difference is due to the timing of the cash settlements for shares repurchased near the end of the year plus the accrual of liabilities to pay excise taxes resulting from share repurchases.