Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Revenues		$ 905.0	$ 879.1
Costs and expenses:
Cost of revenues		702.7	693.6
Selling, general and administrative expenses		141.7	123.1
Total costs and expenses		844.4	816.7
Other operating income (expense)		(2.2)	2.4
Operating profit		58.4	64.8
Interest expense		(23.0)	(15.0)
Interest and other nonoperating income (expense)		(11.2)	(13.1)
Income from continuing operations before tax		24.2	36.7
Provision for income taxes		9.7	11.4
Income from continuing operations		14.5	25.3
Loss from discontinued operations, net of tax		0.0	0.2
Net income		14.5	25.5
Less net income attributable to noncontrolling interests		0.8	3.2
Net income attributable to Brink’s		13.7	22.3
Amounts attributable to Brink’s
Continuing operations		13.7	22.1
Discontinued operations		0.0	0.2
Net income attributable to Brink’s		$ 13.7	$ 22.3
Basic:
Continuing operations (dollars per share)	[1]	$ 0.27	$ 0.43
Discontinued operations (dollars per share)	[1]	0.00	0.00
Net income (dollars per share)	[1]	0.27	0.44
Diluted:
Continuing operations (dollars per share)	[1]	0.27	0.42
Discontinued operations (dollars per share)	[1]	0.00	0.00
Net income (dollars per share)	[1]	$ 0.27	$ 0.43
Weighted-average shares
Basic (shares)		50.0	50.9
Diluted (shares)		50.9	52.1
Cash dividends paid per common share (dollars per share)		$ 0.15	$ 0.15

[1] Amounts may not add due to rounding.