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Available-for-Sale Securities
 12 Months Ended
Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]  
Available-for-Sale Securities
Available-for-Sale Securities
During fiscal 2015 and 2014, we purchased marketable securities, which are classified as available-for-sale and are carried at fair value in the consolidated balance sheets. We held the following investments in marketable securities at fair value at June 30:
(in millions)
2015
 
2014
Current available-for-sale securities:
 
 
 
Commercial paper
$
4

 
$
4

Treasury bills
12

 
85

International bonds
2

 
1

Corporate bonds
34

 
3

U.S. agency bonds
5

 
—

Asset-backed securities
8

 
—

U.S. agency mortgage-backed securities
26

 
—

Total current available-for-sale securities
91

 
93

 
 
 
 
Long-term available-for-sale securities:
 
 
 
Corporate bonds
33

 
5

U.S. agency bonds
18

 
2

Asset-backed securities
41

 
—

U.S. agency mortgage-backed securities
10

 
—

Total long-term available-for-sale securities
102

 
7

Total available-for-sale securities
$
193

 
$
100


Gross unrealized gains and losses were immaterial at both June 30, 2015 and 2014. We did not recognize any other-than-temporary impairments during fiscal 2015 or 2014. At June 30, 2015, the weighted-average effective maturity of our current and long-term investments was approximately 8 months and 16 months, respectively.