Investments

12 Months Ended

Dec. 31, 2013

Investments

Investments

4. Investments

The following table summarizes our short-term and long-term investments at December 31, 2013 and 2012 (amounts in millions):

				Amortized		Gross unrealized		Gross unrealized		Fair
At December 31, 2013				cost		gains		losses		Value
Short-term investments:
	Available-for-sale investments:
		U.S. treasuries and government agency
			securities	$	21	$	---	$	---	$	21
	Restricted cash										12
Total short-term investments										$	33
Long-term investments:
	Available-for-sale investments:
		Auction rate securities held through Morgan
			Stanley Smith Barney LLC	$	8	$	1	$	---	$	9
				Amortized		Gross unrealized		Gross unrealized		Fair
At December 31, 2012				cost		gains		losses		Value
Short-term investments:
	Available-for-sale investments:
		U.S. treasuries and government agency
			securities	$	387	$	---	$	---	$	387
		Corporate bonds			11		---		---		11
	Restricted cash										18
Total short-term investments										$	416
Long-term investments:
	Available-for-sale investments:
		Auction rate securities held through Morgan
			Stanley Smith Barney LLC	$	8	$	---	$	---	$	8

The following table summarizes the contractually stated maturities of our short-term and long-term investments classified as available-for-sale at December 31, 2013 (amounts in millions):

	Amortized		Fair
At December 31, 2013	cost		Value
U.S. treasuries and government agency securities
due in 1 year or less	$	21	$	21
Auction rate securities due after ten years		8		9
	$	29	$	30