Retirement Plans - Net Periodic Benefit Cost (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Settlements and curtailments	$ 2.1	$ 2.4	$ 3.1
Estimated amortization of net actuarial loss amount	1.5
Estimated amortization of net prior service credit	0.4
Estimated amortization of net obligation at transition	0.3
International
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	0.5	0.6	0.7
Interest cost	2.0	2.2	2.5
Expected return on plan assets	(2.5)	(2.3)	(3.0)
Amortization of net actuarial loss	0.5	0.3	0.2
Amortization of prior service (credit) cost	(0.4)	(0.5)	(0.5)
Amortization of transition obligations	0.3	0.3	0.3
Net periodic pension cost (credit)	0.4	0.6	0.2
Settlements and curtailments	0	0	0.6
Total pension cost (credit)	0.4	0.6	0.8
United States
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	0	0	0
Interest cost	3.3	3.2	4.2
Expected return on plan assets	(5.1)	(5.7)	(6.3)
Amortization of net actuarial loss	1.9	1.5	1.2
Amortization of prior service (credit) cost	0	0	0
Amortization of transition obligations	0	0	0
Net periodic pension cost (credit)	0.1	(1.0)	(0.9)
Settlements and curtailments	2.1	2.4	2.5
Total pension cost (credit)	2.2	1.4	1.6
Minimum | International
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Total pension cost for individual plan	0.1	0.1	0.1
Total pension credit for individual plan	0.1	0.1	0.1
Maximum | International
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Total pension cost for individual plan	0.5	0.6	0.4
Total pension credit for individual plan	$ 0.2	$ 0.2	$ 0.2