Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2015

Investments, Debt and Equity Securities [Abstract]

Our investments in marketable securities consisted of the following:



	As of June 30, 2015				As of December 31, 2014
(millions)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Corporate debt securities	$	57	$	57	$	93	$	93
U.S. government and agency debt securities	2		2		22		22
Asset-backed debt securities	12		12		17		17
Certificates of deposit	9		9		18		18
Municipal debt securities	2		2		4		4
Total marketable securities	$	82	$	82	$	154	$	154

Contractual maturities of marketable securities

Contractual maturities of marketable securities as of June 30, 2015 were as follows:



(millions)	Amortized Cost		Fair Value
Due in 1 year or less	$	61	$	61
Due in 1-5 years	21		21
Total marketable securities	$	82	$	82

- 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.

+ References + Details