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Available-for-Sale Securities (Tables)
3 Months Ended
Sep. 30, 2016
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, 2016
 
June 30, 2016
Current available-for-sale securities:
 
 
 
Treasury bills
$

 
$
3

International bonds
3

 
2

Corporate bonds
58

 
58

U.S. agency bonds
7

 
6

Asset-backed securities
31

 
28

International equity securities
2

 
2

U.S. agency mortgage-backed securities
7

 
14

Total current available-for-sale securities
108

 
113

Long-term available-for-sale securities:
 
 
 
Treasury bills
29

 
10

International bonds
3

 
1

Corporate bonds
32

 
36

U.S. agency bonds
8

 
9

Asset-backed securities
8

 
17

U.S. agency mortgage-backed securities
12

 
14

Total long-term available-for-sale securities
92

 
87

Total available-for-sale securities
$
200

 
$
200