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Available-for-Sale Securities | 12 Months Ended
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Jun. 30, 2016
Investments, Debt and Equity Securities [Abstract] |
Available-for-Sale Securities | 5. Available-for-Sale Securities We invest in 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) | 2016 |  | 2015
Current available-for-sale securities: |  |  |
Commercial paper | $ | — |  |  | $ | 4 |
Treasury bills | 3 |  |  | 12 |
International bonds | 2 |  |  | 2 |
Corporate bonds | 58 |  |  | 34 |
U.S. agency bonds | 6 |  |  | 5 |
Asset-backed securities | 28 |  |  | 8 |
International equity securities | 2 |  |  | — |
U.S. agency mortgage-backed securities | 14 |  |  | 26 |
Total current available-for-sale securities | 113 |  |  | 91 |
Long-term available-for-sale securities: |  |  |
Treasury bills | 10 |  |  | — |
International bonds | 1 |  |  | — |
Corporate bonds | 36 |  |  | 33 |
U.S. agency bonds | 9 |  |  | 18 |
Asset-backed securities | 17 |  |  | 41 |
U.S. agency mortgage-backed securities | 14 |  |  | 10 |
Total long-term available-for-sale securities | 87 |  |  | 102 |
Total available-for-sale securities | $ | 200 |  |  | $ | 193 |
Gross unrealized gains and losses were immaterial at both June 30, 2016 and 2015. During fiscal 2016, 2015 and 2014 gross realized gains and losses were immaterial and we did not recognize any other-than-temporary impairments. At June 30, 2016, the weighted-average effective maturity of our current and long-term investments was approximately 6 months and 15 months, respectively.

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