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Details of Consolidated Statements of Cash Flows - Components of Cash and Cash Equivalents (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Bank term deposits, bankers' acceptances and government paper	$ 1,220	$ 968
Cash	302	357
Cash and cash equivalents	$ 1,522	$ 1,325	$ 1,881	$ 1,270

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- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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