Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Revenues		$ 755.8	$ 759.2	$ 2,217.1	$ 2,295.6
Costs and expenses:
Cost of revenues		602.4	616.4	1,803.9	1,866.4
Selling, general and administrative expenses		103.9	111.1	320.9	343.4
Total costs and expenses		706.3	727.5	2,124.8	2,209.8
Other operating income (expense)		0.5	(6.4)	(6.4)	(62.2)
Operating profit		50.0	25.3	85.9	23.6
Interest expense		(5.1)	(4.8)	(14.9)	(14.4)
Interest and other income		0.5	0.9	1.2	1.7
Income from continuing operations before tax		45.4	21.4	72.2	10.9
Provision for income taxes		19.5	14.1	43.4	37.2
Income (loss) from continuing operations		25.9	7.3	28.8	(26.3)
Loss from discontinued operations, net of tax		0.0	(0.1)	0.0	(2.4)
Net income (loss)		25.9	7.2	28.8	(28.7)
Less net income (loss) attributable to noncontrolling interests		1.4	(0.4)	7.1	(20.4)
Net income (loss) attributable to Brink’s		24.5	7.6	21.7	(8.3)
Amounts attributable to Brink’s
Continuing operations		24.5	7.7	21.7	(5.9)
Discontinued operations		0.0	(0.1)	0.0	(2.4)
Net income (loss) attributable to Brink’s		$ 24.5	$ 7.6	$ 21.7	$ (8.3)
Basic:
Continuing operations (dollars per share)	[1]	$ 0.49	$ 0.16	$ 0.44	$ (0.12)
Discontinued operations (dollars per share)	[1]	0.00	0.00	0.00	(0.05)
Net income (loss) (dollars per share)	[1]	0.49	0.16	0.44	(0.17)
Diluted:
Continuing operations (dollars per share)	[1]	0.48	0.16	0.43	(0.12)
Discontinued operations (dollars per share)	[1]	0.00	0.00	0.00	(0.05)
Net income (loss) (dollars per share)	[1]	$ 0.48	$ 0.15	$ 0.43	$ (0.17)
Weighted-average shares
Basic (shares)		50.1	49.4	49.8	49.3
Diluted (shares)		50.7	49.9	50.4	49.3
Cash dividends paid per common share (dollars per share)		$ 0.1	$ 0.1	$ 0.3	$ 0.3

[1] Amounts may not add due to rounding.