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Available-for-Sale Securities (Tables)
3 Months Ended
Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]  
Available-for-sale Securities
We held the following investments in marketable securities at fair value at:
(in millions)
September 30, 2014
 
June 30, 2014
Current available-for-sale securities:
 
 
 
Commercial paper
$
15

 
$
4

Treasury bills
3

 
85

International bonds
1

 
1

Corporate bonds
4

 
3

U.S. agency mortgage-backed securities
2

 

Total current available-for-sale securities
25

 
93

 
 
 
 
Long-term available-for-sale securities:
 
 
 
Corporate bonds
10

 
5

U.S. agency bonds
43

 
2

U.S. agency mortgage-backed securities
13

 

Total long-term available-for-sale securities
66

 
7

Total available-for-sale securities
$
91

 
$
100