Retirement Plans (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				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Dec. 31, 2012		Sep. 30, 2013 Pension Plans, Defined Benefit [Member]	Sep. 30, 2013 Pension Plans, Defined Benefit [Member]	Sep. 30, 2013 United States Pension Plan of US Entity, Defined Benefit [Member]	Sep. 30, 2012 United States Pension Plan of US Entity, Defined Benefit [Member]	Sep. 30, 2013 United States Pension Plan of US Entity, Defined Benefit [Member]	Sep. 30, 2012 United States Pension Plan of US Entity, Defined Benefit [Member]	Sep. 30, 2013 International	Sep. 30, 2012 International	Sep. 30, 2013 International	Sep. 30, 2012 International	Sep. 30, 2013 UK pension [Member]	Sep. 17, 2013 UK pension [Member]	Sep. 30, 2013 Minimum Pension Plans, Defined Benefit [Member]	Sep. 30, 2013 Maximum Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions in current fiscal year									$ 0.3	$ 1.0
Estimated future employer contributions in current fiscal year																					0	2.0
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost											0	0	0	0	0.1	0.1	0.3	0.3
Interest cost											0.9	0.8	2.4	2.4	0	0	0	0
Expected return on plan assets											(1.2)	(1.4)	(3.7)	(4.3)	0	0	0	0
Amortization of net actuarial loss											0.4	0.4	1.3	1.0	0.1	0.1	0.3	0.3
Defined Benefit Plan, Net Periodic Benefit Cost Before Settlements											0.1	(0.2)	0	(0.9)	0.2	0.2	0.6	0.6
Pension settlement	0.2		0.5	1.7		2.0					0.2	0.5	1.7	2.0	10.6	0	10.6	0	10.6
Total pension cost (credit)											0.3	0.3	1.7	1.1	10.8	0.2	11.2	0.6
Deferred income taxes	2.3			2.3			2.1												2.3
Pension assets	$ 0	[1]		$ 0	[1]		$ 6.6	[1]												$ 6.4

[1] The reduction in pension assets as of September 30, 2013 is a result of the settlement of our UK Pension Plan. See Note 9 - Retirement Plans for more information.