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Available-for-Sale Securities (Schedule of Available-for-Sale Securities) (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2014
Schedule of Available-for-sale Securities [Line Items]  
Available-for-sale Securities $ 100 [1]
Available-for-sale Securities, Current 93
Available-for-sale Securities, Noncurrent 7
Commercial Paper
 
Schedule of Available-for-sale Securities [Line Items]  
Available-for-sale Securities, Current 4
Treasury bills
 
Schedule of Available-for-sale Securities [Line Items]  
Available-for-sale Securities, Current 85
International bonds
 
Schedule of Available-for-sale Securities [Line Items]  
Available-for-sale Securities, Current 1
Corporate bonds
 
Schedule of Available-for-sale Securities [Line Items]  
Available-for-sale Securities, Current 3
Available-for-sale Securities, Noncurrent 5
U.S. agency bonds
 
Schedule of Available-for-sale Securities [Line Items]  
Available-for-sale Securities, Noncurrent $ 2
[1] During fiscal 2014, we purchased marketable securities, which are classified as available-for-sale and are carried at fair value in the consolidated balance sheets. Observable level 2 inputs such as quoted prices for similar securities, interest rate spreads, yield curves and credit risk are used to determine the fair value. See Note 6 for additional information regarding available-for-sale securities.