Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Schedule of investments in marketable securities

Our investments in marketable securities as of December 31, 2014 and 2013 consisted of the following:



	2014				2013
millions	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Corporate debt securities	$	93	$	93	$	87	$	87
U.S. government and agency debt securities	22		22		12		12
Asset-backed debt securities	17		17		20		20
Certificates of deposit	18		18		17		17
Municipal debt securities	4		4		6		6
Total marketable securities	$	154	$	154	$	142	$	142

Schedule of contractual maturities of marketable securities

Contractual maturities of marketable securities as of December 31, 2014 were as follows:



(millions)	Amortized Cost		Fair Value
Due in 1 year or less	$	96	$	96
Due in 1-5 years	58		58
Total marketable securities	$	154	$	154

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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