Investments (Tables)

3 Months Ended

Oct. 27, 2012

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

The following tables summarize the Company’s available-for-sale investments (in millions):



October 27, 2012	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Fixed income securities:
U.S. government securities	$	26,401	$	22	$	(9	)	$	26,414
U.S. government agency securities	4,441		14		—			4,455
Non-U.S. government and agency securities	1,388		8		—			1,396
Corporate debt securities	6,105		96		(2		)	6,199
Total fixed income securities	38,335		140		(11		)	38,464
Publicly traded equity securities	1,263		512		(12		)	1,763
Total	$	39,598	$	652	$	(23	)	$	40,227



July 28, 2012	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Fixed income securities:
U.S. government securities	$	24,201	$	41	$	(1	)	$	24,241
U.S. government agency securities	5,367		21		—			5,388
Non-U.S. government and agency securities	1,629		9		—			1,638
Corporate debt securities	5,959		74		(3		)	6,030
Total fixed income securities	37,156		145		(4		)	37,297
Publicly traded equity securities	1,107		524		(11		)	1,620
Total	$	38,263	$	669	$	(15	)	$	38,917

Schedule of Realized Gain (Loss) [Table Text Block]

The following table presents the gross realized gains and gross realized losses related to the Company’s available-for-sale investments (in millions):



Three Months Ended	October 27, 2012			October 29, 2011
Gross realized gains	$	72		$	236
Gross realized losses	(45		)	(227		)
Total	$	27		$	9

The following table presents the realized net gains (losses) related to the Company's available-for-sale investments by security type (in millions):



Three Months Ended	October 27, 2012		October 29, 2011
Net gains (losses) on investments in publicly traded equity securities	$	10	$	(16	)
Net gains on investments in fixed income securities	17		25
Total	$	27	$	9

Schedule of Unrealized Loss on Investments [Table Text Block]

The following tables present the breakdown of the available-for-sale investments with gross unrealized losses and the duration that those losses had been unrealized at October 27, 2012 and July 28, 2012 (in millions):



	UNREALIZED LOSSES LESS THAN 12 MONTHS					UNREALIZED LOSSES 12 MONTHS OR GREATER				TOTAL
October 27, 2012	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
Fixed income securities:
U.S. government agency securities	$	12,477	$	(9	)	$	—	$	—	$	12,477	$	(9	)
Corporate debt securities	469		(2		)	—		—		469		(2		)
Total fixed income securities	12,946		(11		)	—		—		12,946		(11		)
Publicly traded equity securities	270		(12		)	—		—		270		(12		)
Total	$	13,216	$	(23	)	$	—	$	—	$	13,216	$	(23	)



	UNREALIZED LOSSES LESS THAN 12 MONTHS					UNREALIZED LOSSES 12 MONTHS OR GREATER					TOTAL
July 28, 2012	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Fixed income securities:
U.S. government agency securities	$	5,357	$	(1	)	$	—	$	—		$	5,357	$	(1	)
Corporate debt securities	603		(3		)	14		—			617		(3		)
Total fixed income securities	5,960		(4		)	14		—			5,974		(4		)
Publicly traded equity securities	167		(8		)	20		(3		)	187		(11		)
Total	$	6,127	$	(12	)	$	34	$	(3	)	$	6,161	$	(15	)

Investments Classified by Contractual Maturity Date [Table Text Block]

The following table summarizes the maturities of the Company’s fixed income securities at October 27, 2012 (in millions):



	Amortized Cost		Fair Value
Less than 1 year	$	17,224	$	17,238
Due in 1 to 2 years	10,763		10,798
Due in 2 to 5 years	10,265		10,339
Due after 5 years	83		89
Total	$	38,335	$	38,464