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Summary of Significant Accounting Policies (Additional Information) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Significant Accounting Policies [Line Items]
Reserve for product warranties	$ 14	$ 11
Pre tax charges against income for product warranties	15	14	7
Cash outlays related to product warranties	12	10	7
Asset retirement obligation	13	12
Minimum
Significant Accounting Policies [Line Items]
Identifiable intangible assets with finite lives estimated useful lives	2 years
Maximum
Significant Accounting Policies [Line Items]
Identifiable intangible assets with finite lives estimated useful lives	25 years
Commodity Chemicals Segment [Member]
Significant Accounting Policies [Line Items]
Asset retirement obligation	$ 10	$ 9

The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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