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CONTINGENCIES AND COMMITMENTS (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended
	Jan. 31, 2007 Legal Proceedings [Member]	Mar. 31, 2012 Legal Proceedings [Member]	Mar. 31, 2012 Environmental Matters [Member]	Dec. 31, 2011 Environmental Matters [Member]	Mar. 31, 2012 Standby Letters Of Credit [Member]	Dec. 31, 2011 Standby Letters Of Credit [Member]
Loss Contingencies [Line Items]
Litigation Settlement Gross	$ 9.0
Litigation Reserve Current		8.6
Litigation Reserve	6.5
Accrual For Environmental Loss Contingencies			21.5	20.5
Environmental Decommisioning Costs				4.5
Letters of Credit Outstanding Amount					$ 60.1	$ 55.8

Total costs accrued as of the balance sheet date for environmental loss contingencies.

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- Definition

Carrying amount of reserve for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs, which is expected to be paid within one year of the date of the statement of financial position.

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