Accumulated Other Comprehensive Income - Reclasses Out Of AOCI (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				3 Months Ended			3 Months Ended		3 Months Ended		3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Parent [Member]	Dec. 31, 2013 Benefit plan adjustments [Member]	Mar. 31, 2014 Benefit plan adjustments [Member] Reclassification out of Accumulated Other Comprehensive Income [Member]	Mar. 31, 2013 Benefit plan adjustments [Member] Reclassification out of Accumulated Other Comprehensive Income [Member]	Dec. 31, 2013 Foreign Currency Translation Adjustments [Member]	Mar. 31, 2014 Foreign Currency Translation Adjustments [Member] Reclassification out of Accumulated Other Comprehensive Income [Member]	Dec. 31, 2013 Unrealized Gains (Losses) on Available-for-Sale Securities [Member]	Mar. 31, 2014 Unrealized Gains (Losses) on Available-for-Sale Securities [Member] Reclassification out of Accumulated Other Comprehensive Income [Member]	Dec. 31, 2013 Gains (Losses) on Cash Flow Hedges [Member]	Mar. 31, 2014 Gains (Losses) on Cash Flow Hedges [Member] Reclassification out of Accumulated Other Comprehensive Income [Member]	Mar. 31, 2013 Gains (Losses) on Cash Flow Hedges [Member] Reclassification out of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Cost of revenues	$ 795.6	$ 792.6			$ 10.3	$ 17.0
Selling, general and administrative expenses	145.4	131.9			2.8	4.3
Other operating income (expense)	123.1	8.7										(0.7)	(0.4)
Nonoperating Income (Expense)	(0.3)	0.6										0.2	0.2
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			(5.2)		(1.4)			(3.4)		(0.1)		(0.3)
Amounts reclassified from accumulated other comprehensive loss			8.7		7.7			0		0.1		0.9
Other comprehensive income (loss) attributable to Brink's	2.8	5.2	3.5		6.3			(3.4)		0		0.6
Ending Balance - AOCI	$ (613.8)		$ (613.8)	$ (478.0)	$ (471.7)		$ (141.5)	$ (144.9)	$ 1.6	$ 1.6	$ 0.6	$ 1.2