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Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2011


	Amortized		Fair
(millions)	Cost		Value

Corporate debt securities	$	180	$	180
U.S. government and agency debt securities		53		53
Asset-backed debt securities		22		22
Certificates of deposit		44		44
Municipal debt securities		22		22

Total marketable securities	$	321	$	321

Contractual maturities of marketable securities


	Amortized		Fair
(millions)	Cost		Value

Due in 1 year or less	$	161	$	161
Due in 1-5 years		160		160
Due in more than 5 years		—		—

Total marketable securities	$	321	$	321

- Definition

Tabular disclosure of available-for-sale securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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+ Details