Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accrual For Environmental Loss Contingencies Abstract
Accrual For Environmental Loss Contingencies	$ 15.0
Accrued Environmental Loss Contingencies Current	8.0
Components Of Environmental Loss Accrual Abstract
Federal Superfund and comparable state-managed sites	6.0
Formerly owned or operated sites	6.0
Owned or controlled sites at which Company operations have been discontinued	2.0
sites utilized by the company in its ongoing operations	1.0
Operating Leases Future Minimum Payments Due Abstract
Operating Leases Future Minimum Payments Due Current	17.0
Operating Leases Future Minimum Payments Due In Two Years	13.3
Operating Leases Future Minimum Payments Due In Three Years	12.2
Operating Leases Future Minimum Payments Due In Four Years	10.5
Operating Leases Future Minimum Payments Due In Five Years	5.1
Operating Leases Future Minimum Payments Due Thereafter	29.3
Operating Leases Rent Expense Abstract
Lease And Rental Expense	21.4	21.1	21.2
Unconditional Purchase Obligations Excluding Capital Stock Redemptions Abstract
Unrecorded Unconditional Purchase Obligation Description	Commitments for expenditures on property, plant and equipment
Unrecorded Unconditional Purchase Obligation Balance Sheet Amount	$ 529.6