Benefit Plans (Textuals) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
401 (k) plan contributions	$ 3.7	$ 3.5	$ 3.4
Fair value of pension plan assets	251.0	213.3
Accumulated benefit obligation	358.4	316.7
Expected contribution to the plan	6.5
Assumed healthcare cost trend rate, benefit obligation	8.00%
Ultimate healthcare cost trend rate, benefit obligation	5.00%
Effect of one percentage point increase on benefit obligation	1.4
Effect of one percentage point decrease on benefit obligation	1.3
Assumed healthcare cost trend rate, net periodic benefit cost	8.50%
Ultimate healthcare cost trend rate, net periodic benefit cost	5.00%
Effect of one percentage point increase on service and interest cost	0.2
Effect of one percentage point decrease on service and interest cost	0.2
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net curtailment gain in restructuring	0	0.2	0
Settlement loss	0	(0.8)	0
Fair value of pension plan assets	251.0	213.3	212.3
Actuarial net loss that will be amortized from accumulated other comprehensive loss	8.9
Transition obligation that will be amortized from accumulated other comprehensive loss	0.1
Prior service credit that will be amortized from accumulated other comprehensive loss	(1.3)
Discount rate	4.07%	4.87%
Rate of compensation increase	4.39%	4.33%
Long-term rate of return on assets	7.37%	7.59%	7.60%
International Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	22.9	19.6
Accumulated benefit obligation	51.8	42.6
Expected contribution to the plan	2.1
Discount rate	3.93%	4.72%
Rate of compensation increase	2.80%	2.70%
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to the plan	3.5
Discount rate	4.10%	4.90%
Rate of compensation increase	4.50%	4.50%
Percentage of global plan assets	91.00%
Long-term rate of return on assets	7.50%	7.75%	7.75%
Other Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net curtailment gain in restructuring	0	0	0
Settlement loss	0	0	0
Fair value of pension plan assets	0	0	0
Expected contribution to the plan	$ 1.2
Discount rate	3.50%	4.50%
Rate of compensation increase	0.00%	0.00%
Long-term rate of return on assets	0.00%	0.00%	0.00%