LEGAL PROCEEDINGS, COMMITMENTS AND CONTINGENCIES (Detail) (USD $) In Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
Commitments and Contingencies Disclosure [Line Items]
Accrued estimated remediation costs	$ 36
Asset retirement obligations	59
Remediation costs for all identified sites may exceed our reserves	100
Other discontinued operations:
Commitments and Contingencies Disclosure [Line Items]
Environmental remediation expense of discontinued operations	11
Minimum
Commitments and Contingencies Disclosure [Line Items]
Estimated cost that might spend over the next few years to comply with maximum achievable control technology (MACT) standards	30	30
Maximum
Commitments and Contingencies Disclosure [Line Items]
Estimated cost that might spend over the next few years to comply with maximum achievable control technology (MACT) standards	$ 45	$ 100