Net Periodic Cost (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Domestic Pension Plan
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	$ 0	$ 0	$ 0
Interest cost	6.3	6.8	7.3
Expected return on plan assets	(7.7)	(7.5)	(7.0)
Settlement and curtailment losses	0	0	0
Amortization of:
Transition obligation	0	0	0
Prior service cost (credit)	0	0	0
Unrecognized actuarial losses	6.4	6.6	8.6
Defined Benefit Plan, Net Periodic Benefit Cost	5.0	5.9	8.9
Net Periodic Benefit, Discount Rate	5.00%	5.50%	5.51%
Expected Long-term Return on Assets	7.25%	7.50%	7.49%
Benefit Obligation, Discount Rate	4.00%	5.00%	5.50%
Foreign Pension Plans
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	10.2	9.6	9.7
Interest cost	21.9	23.3	22.8
Expected return on plan assets	(18.2)	(19.0)	(17.0)
Settlement and curtailment losses	0.7	0	1.4
Amortization of:
Transition obligation	0	0	0
Prior service cost (credit)	0.2	0.2	0.2
Unrecognized actuarial losses	1.0	0.7	1.9
Defined Benefit Plan, Net Periodic Benefit Cost	15.8	14.8	19.0
Net Periodic Benefit, Discount Rate	5.00%	5.45%	5.50%
Net Periodic Benefit, Rate of Compensation Increase	3.66%	4.37%	4.43%
Expected Long-term Return on Assets	5.02%	5.88%	5.84%
Benefit Obligation, Discount Rate	4.32%	5.00%	5.45%
Benefit Obligation, Rate of Compensation Increase	3.57%	3.66%	4.34%
Domestic Postretirement Benefit Plan
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	0.2	0.2	0.3
Interest cost	2.3	2.7	2.8
Expected return on plan assets	0	0	0
Settlement and curtailment losses	0	0	0
Amortization of:
Transition obligation	0.2	0.1	0.2
Prior service cost (credit)	(0.1)	(0.1)	(0.1)
Unrecognized actuarial losses	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	$ 2.6	$ 2.9	$ 3.2
Net Periodic Benefit, Discount Rate	5.00%	5.50%	5.50%
Benefit Obligation, Discount Rate	4.00%	5.00%	5.50%
Health Care Cost Trend Rate Assumed for Next Year	8.00%	8.00%	8.50%
Year Ultimate Trend Rate is Reached	2019	2016	2017
Ultimate Health Care Cost Trend Rate	5.00%	5.50%	5.50%