Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 3.4	$ (26.4)	$ 2.9	$ (35.9)
Benefit plan adjustments:
Benefit plan experience gains	12.6	13.4	24.3	27.6
Benefit plan prior service cost	(0.6)	(0.5)	(1.0)	(3.5)
Deferred profit sharing	0.0	0.2	0.0	0.2
Total benefit plan adjustments	12.0	13.1	23.3	24.3
Foreign currency translation adjustments	(3.5)	6.9	14.3	(43.5)
Unrealized net losses on available-for-sale securities	(0.2)	(0.1)	0.0	(0.1)
Gains (losses) on cash flow hedges	(0.1)	0.4	(0.4)	0.4
Other comprehensive income (loss) before tax	8.2	20.3	37.2	(18.9)
Provision for income taxes	4.2	4.5	8.0	8.5
Other comprehensive income (loss)	4.0	15.8	29.2	(27.4)
Comprehensive income (loss)	7.4	(10.6)	32.1	(63.3)
Less comprehensive income (loss) attributable to noncontrolling interests	3.3	(13.0)	6.7	(20.9)
Comprehensive income (loss) attributable to Brink's	$ 4.1	$ 2.4	$ 25.4	$ (42.4)