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Discontinued Operations - Schedule of Assets and Liabilities Classified as Held for Sale (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Discontinued Operations And Disposal Groups [Abstract]
Receivables	$ 32	$ 56
Inventories	66	66
Prepaid expenses and other	2	2
Property and equipment, net	103	118
Total assets	203	242	265
Accounts payable	31	47
Accrued liabilities	14	20
Deferred income taxes	4	12
Total liabilities	$ 49	$ 79

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Represents the sum of the carrying value of all the Assets Held-for-Sale at the balance sheet date.

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Property, plant and equipment that is held for sale apart from normal operations and anticipated to be sold in less than one year.

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Carrying amount as of the balance sheet date of inventories classified as held for sale that are segregated from normal operations and that are anticipated to be sold within one year (or in the operating cycle if longer).

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