Marketable Securities

12 Months Ended

Dec. 31, 2012

We hold various investments classified as Marketable securities, including corporate debt, U.S. government and non-U.S. government securities, securities issued by non-U.S. government agencies, and asset-backed securities.

We record marketable securities at fair value with realized and unrealized gains and losses and interest income recorded to Other income, net. Realized gains and losses are measured using the specific identification method. See Note 18 for additional information on fair value measurements.

Investments in marketable securities were as follows (in millions):



	December 31, 2012		December 31, 2011
Fair value	$	2,106	$	3,835
Net unrealized gains/(losses) for period related to instruments still held at year-end	6		(9		)