Borrowings - Schedule of Long-Term Debt (Details) - USD ($) $ in Millions	Oct. 25, 2025	Jul. 26, 2025
Debt Instrument [Line Items]
Other debt	$ 2	$ 3
Total	24,752	24,753
Unaccreted discount/issuance costs	(139)	(142)
Total	24,613	24,611
Current portion of senior notes	3,249	1,750
Long-term debt	$ 21,364	22,861
Fixed-Rate Notes 4.90%, Due February 2026
Debt Instrument [Line Items]
Interest rate, stated percentage	4.90%
Amount	$ 1,000	$ 1,000
Effective Rate	5.00%	5.00%
Fixed-Rate Notes 2.95%, Due February 2026
Debt Instrument [Line Items]
Interest rate, stated percentage	2.95%
Amount	$ 750	$ 750
Effective Rate	3.01%	3.01%
Fixed Rate Notes 2.50%, Due September 2026
Debt Instrument [Line Items]
Interest rate, stated percentage	2.50%
Amount	$ 1,500	$ 1,500
Effective Rate	2.55%	2.55%
Fixed Rate Notes 4.80%, Due February 2027
Debt Instrument [Line Items]
Interest rate, stated percentage	4.80%
Amount	$ 2,000	$ 2,000
Effective Rate	4.90%	4.90%
Fixed Rate Notes 4.55%, Due February 2028
Debt Instrument [Line Items]
Interest rate, stated percentage	4.55%
Amount	$ 1,000	$ 1,000
Effective Rate	4.61%	4.61%
Fixed Rate Notes 4.85%, Due February 2029
Debt Instrument [Line Items]
Interest rate, stated percentage	4.85%
Amount	$ 2,500	$ 2,500
Effective Rate	4.91%	4.91%
Fixed Rate Notes 4.75%, Due February 2030
Debt Instrument [Line Items]
Interest rate, stated percentage	4.75%
Amount	$ 1,000	$ 1,000
Effective Rate	4.73%	4.73%
Fixed Rate Notes 4.95%, Due February 2031
Debt Instrument [Line Items]
Interest rate, stated percentage	4.95%
Amount	$ 2,500	$ 2,500
Effective Rate	5.04%	5.04%
Fixed Rate Notes 4.95%, Due February 2032
Debt Instrument [Line Items]
Interest rate, stated percentage	4.95%
Amount	$ 1,000	$ 1,000
Effective Rate	4.94%	4.94%
Fixed Rate Notes 5.05%, Due February 2034
Debt Instrument [Line Items]
Interest rate, stated percentage	5.05%
Amount	$ 2,500	$ 2,500
Effective Rate	4.97%	4.97%
Fixed Rate Notes 5.10%, Due February 2035
Debt Instrument [Line Items]
Interest rate, stated percentage	5.10%
Amount	$ 1,250	$ 1,250
Effective Rate	5.11%	5.11%
Fixed-Rate Notes 5.90%, Due February 2039
Debt Instrument [Line Items]
Interest rate, stated percentage	5.90%
Amount	$ 2,000	$ 2,000
Effective Rate	6.11%	6.11%
Fixed-Rate Notes 5.50%, Due January 2040
Debt Instrument [Line Items]
Interest rate, stated percentage	5.50%
Amount	$ 2,000	$ 2,000
Effective Rate	5.67%	5.67%
Fixed-Rate Notes 5.30%, Due February 2054
Debt Instrument [Line Items]
Interest rate, stated percentage	5.30%
Amount	$ 2,000	$ 2,000
Effective Rate	5.28%	5.28%
Fixed-Rate Notes 5.50%, Due February 2055
Debt Instrument [Line Items]
Interest rate, stated percentage	5.50%
Amount	$ 750	$ 750
Effective Rate	5.49%	5.49%
Fixed-Rate Notes 5.35%, Due February 2064
Debt Instrument [Line Items]
Interest rate, stated percentage	5.35%
Amount	$ 1,000	$ 1,000
Effective Rate	5.42%	5.42%
Other debt
Debt Instrument [Line Items]
Effective Rate	1.13%	1.13%