Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Jan. 28, 2023	Jul. 30, 2022
Assets:
Available-for-sale debt investments:	$ 12,772	$ 11,947
Marketable equity securities	280	241
Derivative assets	36	78
Total	20,775	17,813
Liabilities:
Derivative liabilities	73	89
Total	73	89
Money market funds
Assets:
Other assets:	1,500	1,500
U.S. government securities
Assets:
Available-for-sale debt investments:	1,998	1,238
U.S. government agency securities
Assets:
Available-for-sale debt investments:	164	138
Non-U.S. government and agency securities
Assets:
Available-for-sale debt investments:	353	272
Corporate debt securities
Assets:
Available-for-sale debt investments:	7,140	7,818
U.S. agency mortgage-backed securities
Assets:
Available-for-sale debt investments:	1,827	1,976
Commercial paper
Assets:
Available-for-sale debt investments:	1,029	255
Certificates of deposit
Assets:
Available-for-sale debt investments:	261	250
Money market funds
Assets:
Cash equivalents:	5,038	3,930
Commercial paper
Assets:
Cash equivalents:	1,037	72
Corporate debt securities
Assets:
Cash equivalents:	41	1
U.S. government securities
Assets:
Cash equivalents:	40	12
Certificates of deposit
Assets:
Cash equivalents:	31	32
Level 1
Assets:
Marketable equity securities	280	241
Derivative assets	0	0
Total	6,818	5,671
Liabilities:
Derivative liabilities	0	0
Total	0	0
Level 1 \| Money market funds
Assets:
Other assets:	1,500	1,500
Level 1 \| U.S. government securities
Assets:
Available-for-sale debt investments:	0	0
Level 1 \| U.S. government agency securities
Assets:
Available-for-sale debt investments:	0	0
Level 1 \| Non-U.S. government and agency securities
Assets:
Available-for-sale debt investments:	0	0
Level 1 \| Corporate debt securities
Assets:
Available-for-sale debt investments:	0	0
Level 1 \| U.S. agency mortgage-backed securities
Assets:
Available-for-sale debt investments:	0	0
Level 1 \| Commercial paper
Assets:
Available-for-sale debt investments:	0	0
Level 1 \| Certificates of deposit
Assets:
Available-for-sale debt investments:	0	0
Level 1 \| Money market funds
Assets:
Cash equivalents:	5,038	3,930
Level 1 \| Commercial paper
Assets:
Cash equivalents:	0	0
Level 1 \| Corporate debt securities
Assets:
Cash equivalents:	0	0
Level 1 \| U.S. government securities
Assets:
Cash equivalents:	0	0
Level 1 \| Certificates of deposit
Assets:
Cash equivalents:	0	0
Level 2
Assets:
Marketable equity securities	0	0
Derivative assets	36	78
Total	13,957	12,142
Liabilities:
Derivative liabilities	73	89
Total	73	89
Level 2 \| Money market funds
Assets:
Other assets:	0	0
Level 2 \| U.S. government securities
Assets:
Available-for-sale debt investments:	1,998	1,238
Level 2 \| U.S. government agency securities
Assets:
Available-for-sale debt investments:	164	138
Level 2 \| Non-U.S. government and agency securities
Assets:
Available-for-sale debt investments:	353	272
Level 2 \| Corporate debt securities
Assets:
Available-for-sale debt investments:	7,140	7,818
Level 2 \| U.S. agency mortgage-backed securities
Assets:
Available-for-sale debt investments:	1,827	1,976
Level 2 \| Commercial paper
Assets:
Available-for-sale debt investments:	1,029	255
Level 2 \| Certificates of deposit
Assets:
Available-for-sale debt investments:	261	250
Level 2 \| Money market funds
Assets:
Cash equivalents:	0	0
Level 2 \| Commercial paper
Assets:
Cash equivalents:	1,037	72
Level 2 \| Corporate debt securities
Assets:
Cash equivalents:	41	1
Level 2 \| U.S. government securities
Assets:
Cash equivalents:	40	12
Level 2 \| Certificates of deposit
Assets:
Cash equivalents:	$ 31	$ 32

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