Fair Value (Tables)

3 Months Ended

Oct. 27, 2018

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

Assets and liabilities measured at fair value on a recurring basis were as follows (in millions):

	OCTOBER 27, 2018 FAIR VALUE MEASUREMENTS						JULY 28, 2018 FAIR VALUE MEASUREMENTS
	Level 1		Level 2		Total Balance		Level 1		Level 2		Total Balance
Assets:
Cash equivalents:
Money market funds	$	6,332	$	—	$	6,332	$	6,890	$	—	$	6,890
Commercial paper	—		210		210		—		—		—
Certificates of deposit	—		20		20		—		—		—
Repurchase agreements	—		16		16		—		—		—
Available-for-sale debt investments:
U.S. government securities	—		5,754		5,754		—		7,275		7,275
U.S. government agency securities	—		430		430		—		727		727
Non-U.S. government and agency securities	—		153		153		—		208		208
Corporate debt securities	—		26,031		26,031		—		27,364		27,364
U.S. agency mortgage-backed securities	—		1,421		1,421		—		1,435		1,435
Commercial paper	—		309		309		—		—		—
Certificates of deposit	—		85		85		—		—		—
Equity investments:
Marketable equity securities	—		—		—		605		—		605
Derivative assets	—		6		6		—		2		2
Total	$	6,332	$	34,435	$	40,767	$	7,495	$	37,011	$	44,506
Liabilities:
Derivative liabilities	$	—	$	91	$	91	$	—	$	74	$	74
Total	$	—	$	91	$	91	$	—	$	74	$	74

Fair Value Measurements, Nonrecurring

The following table presents gains and losses on assets that were measured at fair value on a nonrecurring basis (in millions):

	TOTAL GAINS (LOSSES) FOR THE THREE MONTHS ENDED
	October 27, 2018			October 28, 2017
Non-marketable equity securities	$	(6	)	$	(21	)