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Available-for-Sale Securities (Tables)
6 Months Ended
Dec. 31, 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)
December 31, 2016
 
June 30, 2016
Current available-for-sale securities:
 
 
 
Treasury bills
$

 
$
3

International bonds
3

 
2

Corporate bonds
59

 
58

U.S. agency bonds
11

 
6

Asset-backed securities
26

 
28

International equity securities
1

 
2

U.S. agency mortgage-backed securities
10

 
14

Total current available-for-sale securities
110

 
113

Long-term available-for-sale securities:
 
 
 
Treasury bills
24

 
10

International bonds
3

 
1

Corporate bonds
29

 
36

U.S. agency bonds

 
9

Asset-backed securities
16

 
17

U.S. agency mortgage-backed securities
19

 
14

Total long-term available-for-sale securities
91

 
87

Total available-for-sale securities
$
201

 
$
200