Employee Benefits (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Domestic Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	$ 0	$ 0
Interest cost	1.6	1.7
Expected return on plan assets	(1.9)	(1.8)
Amortization of:
Transition obligation	0	0
Prior service cost	0	0
Unrecognized actuarial losses	1.5	1.7
Net periodic cost	1.2	1.6
Defined benefit plan, Contributions made by employer	2.3
Defined benefit plan, Estimated future employer contributions in current fiscal year	3.0
Foreign Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	2.7	2.2
Interest cost	5.4	5.8
Expected return on plan assets	(4.5)	(4.7)
Amortization of:
Transition obligation	0	0
Prior service cost	0	0
Unrecognized actuarial losses	0.3	0.2
Net periodic cost	3.9	3.5
Defined benefit plan, Contributions made by employer	4.5
Defined benefit plan, Estimated future employer contributions in current fiscal year	10.0
Domestic Postretirement Benefit Plan
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	0	0.1
Interest cost	0.6	0.7
Expected return on plan assets	0	0
Amortization of:
Transition obligation	0	0
Prior service cost	0	0
Unrecognized actuarial losses	0.1	0
Net periodic cost	$ 0.7	$ 0.8