Pension and Other Post-Retirement Plans - Funded Status (Details) (Defined benefit pension plans, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined benefit pension plans
Change in benefit obligation:
Benefit obligation at beginning of year	$ 105.9	$ 91.3
Service cost	2.5	2.1	2.1
Interest cost	4.7	4.7	4.5
Prior Service Cost	0	(2.5)
Participant contributions	1.2	1.2
Curtailments	0.2	0
Actuarial (gain) loss	3.5	8.1
Benefits paid	(2.8)	(2.5)
Settlement payments	0	0
Other, principally foreign exchange	(1.9)	3.5
Benefit obligation at end of year	113.3	105.9	91.3
Change in plan assets:
Fair value of plan assets at beginning of year	88.0	73.2
Business sale	0	0
Actual gain (loss) on plan assets	14.9	9.7
Employer contributions	3.3	3.6
Participant contributions	1.2	1.2
Benefits paid	(2.8)	(2.5)
Settlement payments	0	0
Other, principally foreign exchange	(1.3)	2.8
Fair value of assets at end of year	103.3	88.0	73.2
Amounts recognized in the consolidated balance sheets:
Funded status (current)	0	0
Funded status (non-current)	(10.0)	(17.9)
Accumulated other comprehensive income (pre-tax):
Unrecognized actuarial loss	12.6	19.9
Unrecognized prior service cost	(3.0)	(3.4)
Net amount recognized	$ (0.4)	$ (1.4)