Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Revenues		$ 805.9	$ 739.5	$ 1,594.3	$ 1,461.3
Costs and expenses:
Cost of revenues		628.9	596.1	1,239.2	1,185.0
Selling, general and administrative expenses		122.8	105.0	229.9	213.7
Total costs and expenses		751.7	701.1	1,469.1	1,398.7
Other operating income (expense)		(5.9)	(6.2)	(6.0)	(6.9)
Operating profit		48.3	32.2	119.2	55.7
Interest expense		(6.0)	(4.9)	(10.8)	(9.8)
Interest and other income (expense)		(11.4)	(9.4)	(22.6)	(19.1)
Income from continuing operations before tax		30.9	17.9	85.8	26.8
Provision for income taxes		17.3	14.5	31.7	23.9
Income from continuing operations		13.6	3.4	54.1	2.9
Loss from discontinued operations, net of tax		(0.1)	0.0	(0.1)	0.0
Net income		13.5	3.4	54.0	2.9
Less net income (loss) attributable to noncontrolling interests		(0.7)	3.1	5.1	5.7
Net income (loss) attributable to Brink’s		14.2	0.3	48.9	(2.8)
Amounts attributable to Brink’s
Continuing operations		14.3	0.3	49.0	(2.8)
Discontinued operations		(0.1)	0.0	(0.1)	0.0
Net income (loss) attributable to Brink’s		$ 14.2	$ 0.3	$ 48.9	$ (2.8)
Basic:
Continuing operations (dollars per share)	[1]	$ 0.28	$ 0.01	$ 0.97	$ (0.06)
Discontinued operations (dollars per share)	[1]	0.00	0.00	0.00	0.00
Net income (loss) (dollars per share)	[1]	0.28	0.01	0.97	(0.06)
Diluted:
Continuing operations (dollars per share)	[1]	0.28	0.01	0.95	(0.06)
Discontinued operations (dollars per share)	[1]	0.00	0.00	0.00	0.00
Net income (loss) (dollars per share)	[1]	$ 0.28	$ 0.01	$ 0.95	$ (0.06)
Weighted-average shares
Basic (shares)		50.7	49.9	50.6	49.7
Diluted (shares)		51.6	50.3	51.5	49.7
Cash dividends paid per common share (dollars per share)		$ 0.15	$ 0.1	$ 0.25	$ 0.2

[1] Amounts may not add due to rounding.