Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenues		$ 1,216.2	$ 1,133.9	$ 2,401.6	$ 2,207.9
Costs and expenses:
Cost of revenues		943.8	867.5	1,864.1	1,707.2
Selling, general and administrative expenses		170.6	167.5	347.6	339.1
Total costs and expenses		1,114.4	1,035.0	2,211.7	2,046.3
Other operating income (expense)		3.8	(2.4)	(4.5)	(2.7)
Operating profit		105.6	96.5	185.4	158.9
Interest expense		(51.1)	(32.4)	(97.7)	(60.3)
Interest and other nonoperating income (expense)		4.1	3.4	8.8	2.1
Income from continuing operations before tax		58.6	67.5	96.5	100.7
Provision (benefit) for income taxes		23.4	29.3	43.7	(11.8)
Income from continuing operations		35.2	38.2	52.8	112.5
Income (loss) from discontinued operations, net of tax		(0.1)	(0.1)	0.6	(0.2)
Net income		35.1	38.1	53.4	112.3
Less net income attributable to noncontrolling interests		3.0	3.0	6.3	5.9
Net income attributable to Brink’s		32.1	35.1	47.1	106.4
Amounts attributable to Brink’s
Continuing operations		32.2	35.2	46.5	106.6
Discontinued operations		(0.1)	(0.1)	0.6	(0.2)
Net income attributable to Brink’s		$ 32.1	$ 35.1	$ 47.1	$ 106.4
Basic:
Continuing operations (dollars per share)	[1]	$ 0.69	$ 0.74	$ 0.99	$ 2.24
Discontinued operations (dollar per share)	[1]	0	0	0.01	0
Net income (dollars per share)	[1]	0.69	0.74	1.01	2.23
Diluted:
Continuing operations (dollars per share)	[1]	0.68	0.73	0.98	2.22
Discontinued operations (dollar per share)	[1]	0	0	0.01	0
Net income (dollars per share)	[1]	$ 0.68	$ 0.73	$ 0.99	$ 2.21
Weighted-average shares
Basic (shares)		46.7	47.4	46.7	47.6
Diluted (shares)		47.3	47.8	47.4	48.0
Cash dividends paid per common share (dollars per share)		$ 0.22	$ 0.20	$ 0.42	$ 0.40

[1] Amounts may not add due to rounding.