Selected Quarterly Financial Data (unaudited) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Quarterly Financial Data [Abstract]
Revenues	$ 776.1		$ 949.6
Operating profit	12.9		(73.7)
Amounts Attributable To Brink's Income (Loss) From [Abstract]
Continuing operations	(0.6)		(59.0)
Discontinued operations	(2.4)		0.5
Net income attributable to Brink's	(3.0)		(58.5)
Depreciation and amortization	36.7		41.9
Capital expenditures	14.3		23.8
Basic:
Continuing operations	$ (0.01)	[1]	$ (1.21)	[1]
Discontinued operations	$ (0.05)	[1]	$ 0.01	[1]
Net income (loss)	$ (0.06)	[1]	$ (1.2)	[1]
Diluted:
Continuing operations	$ (0.01)	[1]	$ (1.21)	[1]
Discontinued operations	$ (0.05)	[1]	$ 0.01	[1]
Net income (loss)	$ (0.06)	[1]	$ (1.2)	[1]
US Plans [Member]
Effect of Fourth Quarter Events [Line Items]
Settlement loss	$ 0		$ 0

[1] Amounts may not add due to rounding.