Retirement Plans - Pension Plans Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended												12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 United States	Dec. 31, 2012 United States	Dec. 31, 2011 United States	Dec. 31, 2010 United States	Dec. 31, 2009 United States	Dec. 31, 2013 UK pension [Member]	Sep. 17, 2013 UK pension [Member]	Dec. 31, 2012 UK pension [Member]	Dec. 31, 2013 International	Dec. 31, 2012 International	Dec. 31, 2013 Minimum Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Maximum Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension expense	$ 2.6	$ 2.0	$ 2.4
Employer contributions in current fiscal year				1.5	0	2.9							1.5	2.2
Estimated future employer contributions in next fiscal year															2	4
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 2013					0.0280
Interest credit rate for 2014					0.0380
Pension settlement loss					2.1	2.4	2.5			10.6
Noncurrent assets					0	0					6.4		0	6.1
Deferred Income Taxes and Other Liabilities, Noncurrent												$ 2.3