Loss from Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Discontinued European Operations [Member]	Sep. 30, 2012 Discontinued European Operations [Member]	Sep. 30, 2013 Discontinued European Operations [Member]	Sep. 30, 2012 Discontinued European Operations [Member]	Sep. 30, 2013 German CIT Operations [Member]	Sep. 30, 2012 German CIT Operations [Member]	Sep. 30, 2013 German CIT Operations [Member]	Sep. 30, 2012 German CIT Operations [Member]	Sep. 30, 2013 Poland Divestiture [Member]	Sep. 30, 2013 Morocco Divestiture [Member]	Sep. 30, 2013 Morocco Divestiture [Member]	Dec. 31, 2012 Morocco Divestiture [Member]	Sep. 30, 2013 Hungary Business [Member]	Sep. 30, 2013 German Aviation Security Service [Member]
Discontinued operations [Line Items]
Loss from operations before tax	$ (3.9)	$ (8.6)	$ (28.3)	$ (20.1)
Loss on sale	(2.9)	0	(3.6)	0									0.3	0.3	0.6	0.3	2.8	0.1
Adjustments to contingencies of former operations	(0.3)	0	0.9	0.1
Income (loss) from discontinued operations before income taxes	(7.1)	(8.6)	(31.0)	(20.0)
Provision (credit) for income taxes	0.2	(0.8)	0.9	(2.4)
Loss from discontinued operations, net of tax	(7.3)	(7.8)	(31.9)	(17.6)
Revenues - disposal group					17.4	34.0	67.8	101.5	15.8	14.3	46.6	42.2
Losses from operations before tax									1.3	2.5	22.9	8.3
Interest expense included in discontinued operations					0.1	0.1	0.2	0.3
Termination benefits			$ 15.9