Accumulated Other Comprehensive Income - Reclasses Out Of AOCI (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Cost of revenues	$ 799.7	$ 764.6	$ 2,415.0	$ 2,281.3
Selling, general and administrative expenses	143.5	143.5	425.7	414.0
Other operating income (expense)	(1.2)	(8.9)	7.4	(9.8)
Nonoperating Income (Expense)	0.3	1.5	1.2	6.3
Accumulated Other Comprehensive Income [Abstract]
Beginning balance - AOCI			(773.4)
Other comprehensive income (loss) attributable to Brink's	20.9	22.3	13.3	23.1
Acquisitions of Noncontrolling Interests			18.5
Ending Balance - AOCI	(759.3)		(759.3)
Parent [Member]
Accumulated Other Comprehensive Income [Abstract]
Beginning balance - AOCI			(773.4)
Other comprehensive income (loss) before reclassifications			(20.9)
Amounts reclassified from accumulated other comprehensive loss			35.3
Other comprehensive income (loss) attributable to Brink's			14.4
Acquisitions of Noncontrolling Interests			(0.3)
Ending Balance - AOCI	(759.3)		(759.3)
Benefit plan adjustments [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Cost of revenues	16.8	16.8	50.0	47.9
Selling, general and administrative expenses	4.3	5.0	13.0	16.1
Accumulated Other Comprehensive Income [Abstract]
Beginning balance - AOCI			(665.1)
Other comprehensive income (loss) before reclassifications			(1.2)
Amounts reclassified from accumulated other comprehensive loss			36.9
Other comprehensive income (loss) attributable to Brink's			35.7
Acquisitions of Noncontrolling Interests			0
Ending Balance - AOCI	(629.4)		(629.4)
Foreign Currency Translation Adjustments [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income [Abstract]
Beginning balance - AOCI			(109.9)
Other comprehensive income (loss) before reclassifications			(22.5)
Amounts reclassified from accumulated other comprehensive loss			0
Other comprehensive income (loss) attributable to Brink's			(22.5)
Acquisitions of Noncontrolling Interests			(0.3)
Ending Balance - AOCI	(132.7)		(132.7)
Unrealized Gains (Losses) on Available-for-Sale Securities [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income [Abstract]
Beginning balance - AOCI			1.6
Other comprehensive income (loss) before reclassifications			0.3
Amounts reclassified from accumulated other comprehensive loss			(0.2)
Other comprehensive income (loss) attributable to Brink's			0.1
Acquisitions of Noncontrolling Interests			0
Ending Balance - AOCI	1.7		1.7
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]
Other operating income (expense)	(0.1)		2.2
Nonoperating Income (Expense)	(0.3)		(0.8)
Accumulated Other Comprehensive Income [Abstract]
Beginning balance - AOCI			0
Other comprehensive income (loss) before reclassifications			2.5
Amounts reclassified from accumulated other comprehensive loss			(1.4)
Other comprehensive income (loss) attributable to Brink's			1.1
Acquisitions of Noncontrolling Interests			0
Ending Balance - AOCI	$ 1.1		$ 1.1