Accumulated Other Comprehensive Income - Reclasses Out Of AOCI (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		3 Months Ended		3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Parent [Member]	Dec. 31, 2013 Parent [Member]	Jun. 30, 2014 Benefit plan adjustments [Member]	Jun. 30, 2013 Benefit plan adjustments [Member]	Jun. 30, 2014 Benefit plan adjustments [Member]	Jun. 30, 2013 Benefit plan adjustments [Member]	Jun. 30, 2014 Foreign Currency Translation Adjustments [Member]	Dec. 31, 2013 Foreign Currency Translation Adjustments [Member]	Jun. 30, 2014 Unrealized Gains (Losses) on Available-for-Sale Securities [Member]	Dec. 31, 2013 Unrealized Gains (Losses) on Available-for-Sale Securities [Member]	Jun. 30, 2014 Gains (Losses) on Cash Flow Hedges [Member]	Jun. 30, 2014 Gains (Losses) on Cash Flow Hedges [Member]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Cost of revenues	$ 754.6	$ 792.3	$ 1,550.2	$ 1,584.9			$ 7.6	$ 16.2	$ 17.9	$ 33.2
Selling, general and administrative expenses	135.1	144.9	280.5	276.8			2.0	4.4	4.8	8.7
Other operating income (expense)	1.1	(0.1)	124.2	8.6											(0.5)	(1.2)
Nonoperating Income (Expense)	0.6	0.3	0.3	0.9											0.3	0.5
Accumulated Other Comprehensive Income [Abstract]
Beginning balance - AOCI			(617.3)			(617.3)			(478.0)			(141.5)		1.6		0.6
Other comprehensive income (loss) before reclassifications					(1.3)		(3.5)				4.0		(0.1)		(1.7)
Amounts reclassified from accumulated other comprehensive loss					16.6		15.0				(0.2)		0.1		1.7
Other comprehensive income (loss) attributable to Brink's	12.9	(12.8)	15.7	(7.6)	15.3		11.5				3.8
Ending Balance - AOCI	$ (602.0)		$ (602.0)		$ (602.0)	$ (617.3)	$ (466.5)		$ (466.5)		$ (137.7)	$ (141.5)	$ 1.6	$ 1.6	$ 0.6	$ 0.6