Investments (Tables)

12 Months Ended

Dec. 31, 2014

Investments

Summary of short-term and long-term investments

				Amortized		Gross unrealized		Gross unrealized		Fair
At December 31, 2014				cost		gains		losses		Value
Short-term investments:
	Restricted cash									$	10
Total short-term investments										$	10
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, 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

Available-for-sale investments, contractually stated maturities

	Amortized		Fair
At December 31, 2014	cost		Value
Auction rate securities due after ten years	$	8	$	9