Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (0.5)	$ (9.5)
Benefit plan adjustments:
Benefit plan experience gains	11.7	14.2
Benefit plan prior service cost	(0.4)	(3.0)
Total benefit plan adjustments	11.3	11.2
Foreign currency translation adjustments	17.8	(50.4)
Unrealized net gains on available-for-sale securities	0.2	0.0
Losses on cash flow hedges	(0.3)	0.0
Other comprehensive income (loss) before tax	29.0	(39.2)
Provision for income taxes	3.8	4.0
Other comprehensive income (loss)	25.2	(43.2)
Comprehensive income (loss)	24.7	(52.7)
Less comprehensive income (loss) attributable to noncontrolling interests	3.4	(7.9)
Comprehensive income (loss) attributable to Brink's	$ 21.3	$ (44.8)