Fair Value - Assets and Liabilities Measured At Fair Value On Recurring Basis (Details) - USD ($) $ in Millions	Jul. 26, 2025	Jul. 27, 2024
Assets:
Available-for-sale debt investments	$ 7,381	$ 9,865
Marketable equity securities	383	481
Derivative assets	32	64
Total	14,581	15,564
Liabilities:
Derivative liabilities	31	74
Total	31	74
Money market funds
Assets:
Other assets	0	563
U.S. government securities
Assets:
Available-for-sale debt investments	1,961	2,353
U.S. government agency securities
Assets:
Available-for-sale debt investments	67	221
Non-U.S. government and agency securities
Assets:
Available-for-sale debt investments	458	371
Corporate debt securities
Assets:
Available-for-sale debt investments	3,090	3,677
U.S. agency mortgage-backed securities
Assets:
Available-for-sale debt investments	286	1,781
Commercial paper
Assets:
Available-for-sale debt investments	950	1,023
Certificates of deposit
Assets:
Available-for-sale debt investments	569	439
Money market funds
Assets:
Cash equivalents	5,885	3,334
Other current assets	563	750
Commercial paper
Assets:
Cash equivalents	336	468
Certificates of deposit
Assets:
Cash equivalents	0	14
Corporate debt securities
Assets:
Cash equivalents	1	25
Level 1
Assets:
Marketable equity securities	383	481
Derivative assets	0	0
Total	6,831	5,128
Liabilities:
Derivative liabilities	0	0
Total	0	0
Level 1 \| Money market funds
Assets:
Other assets	0	563
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	5,885	3,334
Other current assets	563	750
Level 1 \| Commercial paper
Assets:
Cash equivalents	0	0
Level 1 \| Certificates of deposit
Assets:
Cash equivalents	0	0
Level 1 \| Corporate debt securities
Assets:
Cash equivalents	0	0
Level 2
Assets:
Marketable equity securities	0	0
Derivative assets	32	64
Total	7,750	10,436
Liabilities:
Derivative liabilities	31	74
Total	31	74
Level 2 \| Money market funds
Assets:
Other assets	0	0
Level 2 \| U.S. government securities
Assets:
Available-for-sale debt investments	1,961	2,353
Level 2 \| U.S. government agency securities
Assets:
Available-for-sale debt investments	67	221
Level 2 \| Non-U.S. government and agency securities
Assets:
Available-for-sale debt investments	458	371
Level 2 \| Corporate debt securities
Assets:
Available-for-sale debt investments	3,090	3,677
Level 2 \| U.S. agency mortgage-backed securities
Assets:
Available-for-sale debt investments	286	1,781
Level 2 \| Commercial paper
Assets:
Available-for-sale debt investments	950	1,023
Level 2 \| Certificates of deposit
Assets:
Available-for-sale debt investments	569	439
Level 2 \| Money market funds
Assets:
Cash equivalents	0	0
Other current assets	0	0
Level 2 \| Commercial paper
Assets:
Cash equivalents	336	468
Level 2 \| Certificates of deposit
Assets:
Cash equivalents	0	14
Level 2 \| Corporate debt securities
Assets:
Cash equivalents	$ 1	$ 25

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