Other Operating Income (Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other Income and Expenses [Abstract]
Share of earnings of unconsolidated equity affiliates			$ 6.0	$ 4.8	$ 3.9
Royalty income			2.1	1.7	7.6
Gains (losses) on sale of property and other assets	7.2		7.7	1.2	1.2
Impairment losses			(4.2)	(2.4)	(0.7)
Gains (Losses) on Business Acquisitions and Dispositions		6.7	0.8	9.2	(8.6)
Bargain purchase of Mexican CIT business			0	2.1	5.1
Deconsolidation of Brink's Belgium and write - down to fair value			0	0	(13.4)
Settlement loss			0	10.1	0
Currency exchange transaction losses			(4.1)	(4.1)	(3.8)
Foreign currency hedge gains			0.2	2.2	0
Other			0.8	5.0	4.6
Other Operating Income (Expense), Net			$ 9.3	$ 17.6	$ 4.2