Available-for-Sale Securities

9 Months Ended

Mar. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Available-for-Sale Securities Disclosure

Available-for-Sale Securities

We invest in marketable securities, which are classified as available-for-sale and are carried at fair value in the condensed consolidated balance sheets. We held the following investments in marketable securities at fair value at:

(in millions)	March 31, 2015		June 30, 2014
Current available-for-sale securities:
Commercial paper	$	9	$	4
Treasury bills	—		85
International bonds	1		1
Corporate bonds	4		3
U.S. agency bonds	10		—
U.S. agency mortgage-backed securities	11		—
Total current available-for-sale securities	35		93
Long-term available-for-sale securities:
Corporate bonds	7		5
U.S. agency bonds	26		2
U.S. agency mortgage-backed securities	16		—
Total long-term available-for-sale securities	49		7
Total available-for-sale securities	$	84	$	100

Gross unrealized gains and losses were immaterial at March 31, 2015. During the three and nine months ended March 31, 2015, gross realized gains and losses were immaterial and we did not recognize any other-than-temporary impairments. At March 31, 2015, the weighted-average effective maturity of our current and long-term investments was approximately 6 months and 15 months, respectively.