Available-for-Sale Securities

6 Months Ended

Dec. 31, 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)	December 31, 2015		June 30, 2015
Current available-for-sale securities:
Commercial paper	$	2	$	4
Treasury bills	2		12
International bonds	—		2
Corporate bonds	53		34
U.S. agency bonds	1		5
Asset-backed securities	28		8
International equity securities	2		—
U.S. agency mortgage-backed securities	16		26
Total current available-for-sale securities	104		91
Long-term available-for-sale securities:
International bonds	1		—
Corporate bonds	29		33
U.S. agency bonds	31		18
Asset-backed securities	20		41
U.S. agency mortgage-backed securities	13		10
Total long-term available-for-sale securities	94		102
Total available-for-sale securities	$	198	$	193

Gross unrealized gains and losses were immaterial at December 31, 2015 and June 30, 2015. During the three and six months ended December 31, 2015 and 2014, gross realized gains and losses were immaterial and we did not recognize any other-than-temporary impairments. At December 31, 2015, the weighted-average effective maturity of our current and long-term investments was approximately 6 months and 14 months, respectively.