Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Revenues		$ 5,011.9	$ 4,874.6	$ 4,535.5
Costs and expenses:
Cost of revenues		3,743.1	3,707.1	3,461.9
Selling, general and administrative expenses		834.5	688.1	687.0
Total costs and expenses		4,577.6	4,395.2	4,148.9
Other operating income (expense)		18.7	(54.2)	(25.3)
Operating profit		453.0	425.2	361.3
Interest expense		(235.4)	(203.8)	(138.8)
Interest and other nonoperating income (expense)		48.7	14.4	3.7
Income from continuing operations before tax		266.3	235.8	226.2
Provision for income taxes		92.7	139.2	41.4
Income from continuing operations		173.6	96.6	184.8
Income (loss) from discontinued operations, net of tax		1.1	1.7	(2.9)
Net income		174.7	98.3	181.9
Less net income attributable to noncontrolling interests		11.8	10.6	11.3
Net income attributable to Brink’s		162.9	87.7	170.6
Amounts attributable to Brink’s:
Continuing operations		161.8	86.0	173.5
Discontinued operations		1.1	1.7	(2.9)
Net income attributable to Brink’s		$ 162.9	$ 87.7	$ 170.6
Basic:
Continuing operations (in dollars per share)	[1]	$ 3.65	$ 1.86	$ 3.67
Discontinued operations (in dollars per share)	[1]	0.03	0.04	(0.06)
Net income (in dollars per share)	[1]	3.68	1.90	3.61
Diluted:
Continuing operations (in dollars per share)	[1]	3.61	1.83	3.63
Discontinued operations (in dollars per share)	[1]	0.03	0.04	(0.06)
Net income (in dollars per share)	[1]	$ 3.63	$ 1.87	$ 3.57
Weighted-average shares
Basic (shares)		44.3	46.2	47.3
Diluted (shares)		44.8	46.9	47.8

[1] Amounts may not add due to rounding.