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Available-for-Sale Securities (Tables)
9 Months Ended
Mar. 31, 2018
Investments, Debt and Equity Securities [Abstract]  
Available-for-sale Securities
We held the following investments in marketable securities at fair value at:
(in millions)
March 31, 2018
 
June 30, 2017
Current available-for-sale securities:
 
 
 
Treasury bills
$

 
$
25

International bonds

 
3

Corporate bonds

 
30

U.S. agency bonds

 
3

Asset-backed securities

 
3

International equity securities

 
1

Total available-for-sale securities
$

 
$
65