Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Revenues		$ 1,136.7	$ 1,075.5	$ 3,344.6	$ 3,102.0
Costs and expenses:
Cost of revenues		880.7	837.6	2,587.9	2,415.6
Selling, general and administrative expenses		180.8	161.9	519.9	472.0
Total costs and expenses		1,061.5	999.5	3,107.8	2,887.6
Other operating income (expense)		(15.7)	(1.8)	(18.4)	(5.2)
Operating profit		59.5	74.2	218.4	209.2
Interest expense		(34.7)	(27.6)	(95.0)	(83.0)
Interest and other nonoperating income (expense)		6.3	(0.7)	8.4	(1.6)
Income from continuing operations before tax		31.1	45.9	131.8	124.6
Provision (benefit) for income taxes		8.5	22.9	(3.3)	59.2
Income from continuing operations		22.6	23.0	135.1	65.4
Loss from discontinued operations, net of tax		0.0	0.0	(0.2)	(0.1)
Net income		22.6	23.0	134.9	65.3
Less net income attributable to noncontrolling interests		3.4	4.0	9.3	9.7
Net income attributable to Brink’s		19.2	19.0	125.6	55.6
Amounts attributable to Brink’s
Continuing operations		19.2	19.0	125.8	55.7
Discontinued operations		0.0	0.0	(0.2)	(0.1)
Net income attributable to Brink’s		$ 19.2	$ 19.0	$ 125.6	$ 55.6
Basic:
Continuing operations (dollars per share)	[1]	$ 0.41	$ 0.38	$ 2.65	$ 1.12
Net income (dollars per share)	[1]	0.41	0.38	2.64	1.12
Diluted:
Continuing operations (dollars per share)	[1]	0.41	0.38	2.63	1.11
Net income (dollars per share)	[1]	$ 0.40	$ 0.38	$ 2.62	$ 1.10
Weighted-average shares
Basic (shares)		47.4	49.8	47.5	49.9
Diluted (shares)		47.5	50.3	47.9	50.4
Cash dividends paid per common share (dollars per share)		$ 0.20	$ 0.20	$ 0.60	$ 0.55

[1] Amounts may not add due to rounding.