Debt - Schedule of Long-term Debt (Details) - USD ($)	Jan. 31, 2024	Jul. 31, 2023
Debt Instrument [Line Items]
Total principal balance of debt	$ 6,000,000,000	$ 6,130,000,000
Unamortized discount and debt issuance costs	(50,000,000)	(10,000,000)
Net carrying value of debt	5,950,000,000	6,120,000,000
Short-term debt	0	0
Long-term debt	5,950,000,000	6,120,000,000
Line of Credit | Revolving Credit Facility | Subsidiary
Debt Instrument [Line Items]
Secured revolving credit facilities	500,000,000	430,000,000
0.950% notes due July 2025 | Senior Unsecured Notes
Debt Instrument [Line Items]
Total principal balance of debt	$ 500,000,000	500,000,000
Effective Interest Rate	1.127%
Stated interest rate (in percent)	0.95%
1.350% notes due July 2027 | Senior Unsecured Notes
Debt Instrument [Line Items]
Total principal balance of debt	$ 500,000,000	500,000,000
Effective Interest Rate	1.486%
Stated interest rate (in percent)	1.35%
1.650% notes due July 2030 | Senior Unsecured Notes
Debt Instrument [Line Items]
Total principal balance of debt	$ 500,000,000	500,000,000
Effective Interest Rate	1.767%
Stated interest rate (in percent)	1.65%
5.250% notes due September 2026 | Senior Unsecured Notes
Debt Instrument [Line Items]
Total principal balance of debt	$ 750,000,000	0
Effective Interest Rate	5.367%
Stated interest rate (in percent)	5.25%
5.125% notes due September 2028 | Senior Unsecured Notes
Debt Instrument [Line Items]
Total principal balance of debt	$ 750,000,000	0
Effective Interest Rate	5.221%
Stated interest rate (in percent)	5.125%
5.200% notes due September 2033 | Senior Unsecured Notes
Debt Instrument [Line Items]
Total principal balance of debt	$ 1,250,000,000	0
Effective Interest Rate	5.268%
Stated interest rate (in percent)	5.20%
5.500% notes due September 2053 | Senior Unsecured Notes
Debt Instrument [Line Items]
Total principal balance of debt	$ 1,250,000,000	0
Effective Interest Rate	5.565%
Stated interest rate (in percent)	5.50%
Term loan
Debt Instrument [Line Items]
Total principal balance of debt	$ 0	$ 4,200,000,000
Unsecured revolving credit facility | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Secured revolving credit facilities	$ 0