Fair Value Measurements And Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2012

Fair Value, by Balance Sheet Grouping, Methodology and Assumptions [Abstract]

Summary Of Components Of Available-For-Sale Securities

The following table summarizes the components of the balance of the Company’s available-for-sale securities at June 30, 2012 and December 31, 2011 (in millions):

	June 30, 2012		December 31, 2011
Adjusted cost	$	11	$	9
Gross unrealized gains	32		30
Fair value	$	43	$	39

Summary Of Financial Assets Measured At Fair Value On A Recurring Basis

A summary of financial assets measured at fair value on a recurring basis at June 30, 2012 and December 31, 2011 is as follows (in millions):

	Balance Sheet Classification	June 30, 2012		Quoted Prices In Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Money-market securities	Cash and cash equivalents	$	1,015	$	1,015	$	—	$	—
Available-for-sale securities	Other current assets	43		43		—		—
Trading securities	Other assets	219		219		—		—
Total assets		$	1,277	$	1,277	$	—	$	—

	Balance Sheet Classification	December 31, 2011		Quoted Prices In Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Money-market securities	Cash and cash equivalents	$	745	$	745	$	—	$	—
Available-for-sale securities	Other current assets	39		39		—		—
Trading securities	Other assets	205		205		—		—
Interest rate swap	Other assets	18		—		18		—
Total assets		$	1,007	$	989	$	18	$	—