Marketable Securities And Cash Equivalents (Tables)

9 Months Ended

12 Months Ended

Mar. 31, 2012

Jun. 30, 2011

Marketable Securities And Cash Equivalents

Investments In Debt And Equity Securities

				Unrealized		Unrealized			Fair
	Cost			Gains		Losses			Value
	(In millions)
March 31, 2012
United States government obligations
Maturity less than 1 year		$	438	$	–	$	–		$	438
Maturity 1 to 5 years			91		–		–			91
Government–sponsored enterprise obligations
Maturity 1 to 5 years			1		–		–			1
Corporate debt securities
Maturity 1 to 5 years			48		–		–			48
Other debt securities
Maturity less than 1 year			422		–		–			422
Maturity 1 to 5 years			3		–		–			3
Equity securities
Available-for-sale			136		19		(4	)		151
Trading			26		–		–			26
		$	1,165	$	19	$	(4	)	$	1,180

				Unrealized		Unrealized			Fair
	Cost			Gains		Losses			Value
		(In millions)
June 30, 2011
United States government obligations
Maturity less than 1 year		$	753	$	–	$	–		$	753
Maturity 1 to 5 years			72		1		–			73
Government–sponsored enterprise obligations
Maturity less than 1 year			20		–		–			20
Maturity 1 to 5 years			54		–		–			54
Maturity 5 to 10 years			5		–		–			5
Maturity greater than 10 years			218		8		–			226
Corporate debt securities
Maturity less than 1 year			1		–		–			1
Maturity 1 to 5 years			35		1		–			36
Other debt securities
Maturity less than 1 year			215		–		–			215
Maturity 1 to 5 years			3		–		–			3
Maturity 5 to 10 years			7		–		–			7
Equity securities
Available-for-sale			159		83		(4	)		238
Trading			24		–		–			24
		$	1,566	$	93	$	(4	)	$	1,655