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CHARGES FOR RESTRUCTURING, CLOSURES AND ASSET IMPAIRMENTS - Changes in accrued severance related to restructuring (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Restructuring Cost and Reserve [Line Items]
Accrued severance as of December 31, 2014	$ 10us-gaap_RestructuringReserve
Charges	0us-gaap_SeveranceCosts1	17us-gaap_SeveranceCosts1
Payments	(6)us-gaap_PaymentsForRestructuring
Accrued severance as of March 31, 2015	$ 4us-gaap_RestructuringReserve

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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