Retirement Plans - Pension Plans Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Total pension expense	$ 2.0	$ 2.4	$ 4.5
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions in current fiscal year	5.1
United States
Defined Benefit Plan Disclosure [Line Items]
Employer contributions in current fiscal year	2.9	10.5
Recognized prior service costs as a curtailment loss			0.3
Minimum service years entitle to pension benefits	3 years
Pay credits as a percentage of each participant's eligible earnings			0.03	0.06
Interest credit rate for 2012	0.0302
Interest credit rate for 2013	0.0280
Pension settlement loss	2.4	2.5	2.5
International
Defined Benefit Plan Disclosure [Line Items]
Employer contributions in current fiscal year	2.2	3.8
Minimum | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated future employer contributions in next fiscal year	2
Maximum | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated future employer contributions in next fiscal year	$ 4