Employee Benefit Plans (Details 6) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net periodic pension/postretirement benefit expense
Total net periodic pension/postretirement benefit expense	$ 35.4	$ 52.2	$ 37.2
Domestic Pension Plans
Accumulated benefit obligations in excess of the fair value of plan assets
Projected benefit obligation	1,193.5	1,148.3
Accumulated benefit obligation	1,176.7	1,130.0
Fair value of plan assets	868.2	867.5
Accumulated benefit obligation	1,176.7	1,130.0
Amount of reduction to pension expense	(20.0)
Net periodic pension/postretirement benefit expense
Service cost	9.9	9.3	8.0
Interest cost	57.4	61.1	66.2
Expected return on plan assets	(65.6)	(68.4)	(74.2)
Amortization of unrecognized losses	23.2	36.4	22.0
Amortization of unrecognized prior service credits	(0.9)	(0.9)	(0.8)
Curtailment/settlement loss			0.3
Total net periodic pension/postretirement benefit expense	24.0	37.5	21.5
Other changes in plan assets and benefit obligations recognized in other comprehensive loss
Current year actuarial loss (gain)	46.3
Amortization of actuarial loss	(23.2)
Amortization of prior service credits	0.9
Curtailment gain	0.1
Total other changes in plan assets and benefit obligations recognized in other comprehensive loss	24.1
Estimated amounts that will be amortized from accumulated other comprehensive loss into net periodic benefit expense in 2012
Net actuarial loss	24.6
Net prior service credits	(0.4)
Aggregate estimated amounts that will be amortized from accumulated other comprehensive loss into net periodic benefit expense	24.2
Weighted-average actuarial assumptions used in determining net periodic pension expense:
Discount rate (as a percent)	5.22%	5.80%	7.06%
Rate of increase in compensation levels (as a percent)	4.00%	4.00%	4.25%
Expected long-term rate of return on assets (as a percent)	7.25%	8.25%	8.50%
Weighted-average actuarial assumptions used in determining year-end benefit obligations:
Discount rate (as a percent)	4.69%	5.22%	5.80%
Rate of increase in compensation levels (as a percent)	3.75%	4.00%	4.00%
Domestic Pension Plans | Continuing operations
Net periodic pension/postretirement benefit expense
Total net periodic pension/postretirement benefit expense	24.0	37.5	21.2
Domestic Pension Plans | Discontinued operations
Net periodic pension/postretirement benefit expense
Total net periodic pension/postretirement benefit expense			(0.3)
Foreign Pension Plans
Accumulated benefit obligations in excess of the fair value of plan assets
Projected benefit obligation	112.3	93.9
Accumulated benefit obligation	111.0	92.9
Fair value of plan assets	55.3	45.3
Accumulated benefit obligation	275.3	251.5
Net periodic pension/postretirement benefit expense
Service cost	2.5	2.2
Service cost	2.8	2.3	2.5
Interest cost	14.0	14.0
Interest cost	14.2	14.1	13.9
Expected return on plan assets	(16.2)	(14.3)	(13.2)
Amortization of unrecognized losses	0.9	1.7	2.1
Amortization of unrecognized prior service credits			(0.1)
Curtailment gain	(0.1)
Total net periodic pension/postretirement benefit expense	1.6	3.8	5.2
Other changes in plan assets and benefit obligations recognized in other comprehensive loss
Current year actuarial loss (gain)	13.2
Amortization of actuarial loss	(0.9)
Curtailment gain	0.1
Foreign exchange and other	(0.8)
Total other changes in plan assets and benefit obligations recognized in other comprehensive loss	11.6
Estimated amounts that will be amortized from accumulated other comprehensive loss into net periodic benefit expense in 2012
Net actuarial loss	1.4
Aggregate estimated amounts that will be amortized from accumulated other comprehensive loss into net periodic benefit expense	1.4
Weighted-average actuarial assumptions used in determining net periodic pension expense:
Discount rate (as a percent)	5.42%	5.50%	6.35%
Rate of increase in compensation levels (as a percent)	4.15%	4.10%	4.00%
Expected long-term rate of return on assets (as a percent)	7.00%	7.04%	7.62%
Weighted-average actuarial assumptions used in determining year-end benefit obligations:
Discount rate (as a percent)	5.10%	5.42%	5.50%
Rate of increase in compensation levels (as a percent)	3.92%	4.15%	4.10%
Foreign Pension Plans | Continuing operations
Net periodic pension/postretirement benefit expense
Total net periodic pension/postretirement benefit expense	0.9	3.5	4.3
Foreign Pension Plans | Discontinued operations
Net periodic pension/postretirement benefit expense
Total net periodic pension/postretirement benefit expense	(0.7)	(0.3)	(0.9)
Postretirement Plans
Net periodic pension/postretirement benefit expense
Service cost	0.4	0.3	0.2
Interest cost	7.0	8.0	9.9
Amortization of unrecognized losses	4.5	4.2	3.0
Amortization of unrecognized prior service credits	(1.4)	(1.3)	(1.4)
Total net periodic pension/postretirement benefit expense	10.5	11.2	11.7
Other changes in plan assets and benefit obligations recognized in other comprehensive loss
Current year actuarial loss (gain)	3.9
Amortization of actuarial loss	4.5
Amortization of prior service credits	(1.4)
Total other changes in plan assets and benefit obligations recognized in other comprehensive loss	7.0
Estimated amounts that will be amortized from accumulated other comprehensive loss into net periodic benefit expense in 2012
Net actuarial loss	3.7
Net prior service credits	(1.4)
Weighted-average actuarial assumptions used in determining net periodic pension expense:
Discount rate (as a percent)	4.85%	5.46%	7.07%
Weighted-average actuarial assumptions used in determining year-end benefit obligations:
Discount rate (as a percent)	4.36%	4.85%	5.46%
Assumed health care cost trend rates:
Heath care cost trend rate for next year (as a percent)	7.52%	7.86%	8.21%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) (as a percent)	5.00%	5.00%	5.00%
Year that the rate reaches the ultimate trend rate	2019	2019	2019
Effects on postretirement expense of a percentage point change in assumed health care cost trend rates
Effect of 1% increase on total of service and interest costs	0.4
Effect of 1% decrease on total of service and interest costs	(0.4)
Effect of 1% increase on postretirement benefit obligation	9.4
Effect of 1% decrease on postretirement benefit obligation	$ (8.6)