Available-for-Sale Securities

3 Months Ended

Sep. 30, 2015

Available-for-sale Securities [Abstract]

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

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)	September 30, 2015		June 30, 2015
Current available-for-sale securities:
Commercial paper	$	3	$	4
Treasury bills	7		12
International bonds	2		2
Corporate bonds	47		34
U.S. agency bonds	3		5
Asset-backed securities	23		8
U.S. agency mortgage-backed securities	22		26
Total current available-for-sale securities	107		91
Long-term available-for-sale securities:
Corporate bonds	33		33
U.S. agency bonds	18		18
Asset-backed securities	26		41
U.S. agency mortgage-backed securities	9		10
Total long-term available-for-sale securities	86		102
Total available-for-sale securities	$	193	$	193

Gross unrealized gains and losses were immaterial at September 30, 2015 and June 30, 2015. During the three months ended September 30, 2015 and 2014, gross realized gains and losses were immaterial and we did not recognize any other-than-temporary impairments. At September 30, 2015, the weighted-average effective maturity of our current and long-term investments was approximately 6 months and 15 months, respectively.