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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	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restructuring Costs and Asset Impairment Charges [Abstract]
Accrued severance as of December 31, 2013	$ 2us-gaap_RestructuringReserve
Charges	27us-gaap_SeveranceCosts1	1us-gaap_SeveranceCosts1	0us-gaap_SeveranceCosts1
Payments	(19)us-gaap_PaymentsForRestructuring
Accrued severance as of December 31, 2014	$ 10us-gaap_RestructuringReserve	$ 2us-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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