Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenues		$ 788.4	$ 721.8
Costs and expenses:
Cost of revenues		610.3	588.9
Selling, general and administrative expenses		107.1	108.7
Total costs and expenses		717.4	697.6
Other operating income (expense)		(0.1)	(0.7)
Operating profit		70.9	23.5
Interest expense		(4.8)	(4.9)
Interest and other income (expense)		(11.2)	(9.7)
Income from continuing operations before tax		54.9	8.9
Provision for income taxes		14.4	9.4
Income (loss) from continuing operations		40.5	(0.5)
Loss from discontinued operations, net of tax		0.0	0.0
Net income (loss)		40.5	(0.5)
Less net income attributable to noncontrolling interests		5.8	2.6
Net income (loss) attributable to Brink’s		34.7	(3.1)
Amounts attributable to Brink’s
Continuing operations		34.7	(3.1)
Discontinued operations		0.0	0.0
Net income (loss) attributable to Brink’s		$ 34.7	$ (3.1)
Basic:
Continuing operations (dollars per share)	[1]	$ 0.69	$ (0.06)
Discontinued operations (dollars per share)	[1]	0.00	0.00
Net income (loss) (dollars per share)	[1]	0.69	(0.06)
Diluted:
Continuing operations (dollars per share)	[1]	0.67	(0.06)
Discontinued operations (dollars per share)	[1]	0.00	0.00
Net income (loss) (dollars per share)	[1]	$ 0.67	$ (0.06)
Weighted-average shares
Basic (shares)		50.5	49.5
Diluted (shares)		51.5	49.5
Cash dividends paid per common share (dollars per share)		$ 0.1	$ 0.1

[1] Amounts may not add due to rounding.