Retirement and Other Postretirement Benefit Plans (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Impact of one-percentage-point increase and a one-percentage-point decrease in the discount rate on retirement obligation as of December 31, 2012
Assumed annual rate of increase in the per capita cost of covered health care benefits for medical care (as a percent)	7.10%
Assumed annual rate of increase in the per capita cost of covered health care benefits for dental and vision care (as a percent)	5.00%
Ultimate annual rate of increase in the per capita cost of covered health care benefits for medical care (as a percent)	4.50%
Ultimate annual rate of increase in the per capita cost of covered health care benefits for dental and vision care (as a percent)	5.00%
Impact of a one-percentage-point increase in the assumed health care cost trend on postretirement benefit obligation	$ 0.2
Impact of a one-percentage-point decrease in the assumed health care cost trend on postretirement benefit obligation	0.2
U.S. Non-qualified Defined Benefit Retirement Plans
Assumptions used to estimate the actuarial present value of benefit obligations
Discount rates (as a percent)	2.00%	3.20%	3.70%
Rate of increase in compensation (as a percent)		3.00%	3.50%
Impact of one-percentage-point increase and a one-percentage-point decrease in the expected long-term rate of return and discount rate on periodic pension expense in next fiscal year
One-percentage-point increase in discount rate	(0.1)
One-percentage-point decrease in discount rate	0.1
Impact of one-percentage-point increase and a one-percentage-point decrease in the discount rate on retirement obligation as of December 31, 2012
One-percentage-point increase in discount rate	(1.3)
One-percentage-point decrease in discount rate	1.4
U.S. Non-qualified Defined Benefit Retirement Plans | Minimum
Assumptions used to estimate the actuarial present value of benefit obligations
Rate of increase in compensation (as a percent)	3.00%
U.S. Non-qualified Defined Benefit Retirement Plans | Maximum
Assumptions used to estimate the actuarial present value of benefit obligations
Rate of increase in compensation (as a percent)	5.80%
U.S. Postretirement Plans
Assumptions used to estimate the actuarial present value of benefit obligations
Discount rates (as a percent)	2.75%	3.85%	4.45%
European Defined Benefit Retirement Plans
Assumptions used to estimate the actuarial present value of benefit obligations
Rate of increase in compensation (as a percent)	3.00%	3.00%
European Defined Benefit Retirement Plans | Minimum
Assumptions used to estimate the actuarial present value of benefit obligations
Discount rates (as a percent)	3.25%	4.50%	5.00%
Rate of increase in compensation (as a percent)			3.00%
Expected long-term rate of return on plan assets (as a percent)	4.00%	4.25%	4.50%
European Defined Benefit Retirement Plans | Maximum
Assumptions used to estimate the actuarial present value of benefit obligations
Discount rates (as a percent)	4.50%	4.75%	5.30%
Rate of increase in compensation (as a percent)			4.25%
Expected long-term rate of return on plan assets (as a percent)	6.50%	6.50%	7.00%
United Kingdom defined benefit plan (the U.K. Plan)
Impact of one-percentage-point increase and a one-percentage-point decrease in the expected long-term rate of return and discount rate on periodic pension expense in next fiscal year
One-percentage-point increase in expected long-term rate of return	(1.1)
One-percentage-point increase in discount rate	(0.7)
One-percentage-point decrease in expected long-term rate of return	1.2
One-percentage-point decrease in discount rate	0.8
Impact of one-percentage-point increase and a one-percentage-point decrease in the discount rate on retirement obligation as of December 31, 2012
One-percentage-point increase in discount rate	(28.1)
One-percentage-point decrease in discount rate	34.5
Retiree Medical Plans
Impact of one-percentage-point increase and a one-percentage-point decrease in the expected long-term rate of return and discount rate on periodic pension expense in next fiscal year
One-percentage-point increase in discount rate	0.1
One-percentage-point decrease in discount rate	(0.1)
Impact of one-percentage-point increase and a one-percentage-point decrease in the discount rate on retirement obligation as of December 31, 2012
One-percentage-point increase in discount rate	(0.5)
One-percentage-point decrease in discount rate	$ 0.5