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Debt - narrative (Details) - USD ($) $ in Millions							12 Months Ended
Debt - narrative (Details) - USD ($) $ in Millions	Aug. 12, 2024	Aug. 09, 2023	Dec. 19, 2022	Jun. 17, 2022	Nov. 17, 2021	Nov. 15, 2021	Aug. 31, 2024	Aug. 31, 2023	Aug. 31, 2022
Line of Credit Facility [Line Items]
Interest paid, net of capitalized interest							$ 578	$ 606	$ 420
Loss on early extinguishment of debt							(102)
Commercial paper
Line of Credit Facility [Line Items]
Commercial paper, amount outstanding							$ 0	0
Maximum
Line of Credit Facility [Line Items]
Debt to total capitalization ratio							0.60
Unsecured notes \| 8.125% Notes Payable, Due 2029
Line of Credit Facility [Line Items]
Face amount	$ 750
Stated interest rate (as a percent)	8.125%						8.125%
Long term debt							$ 740	$ 0
Unsecured notes \| 0.9500% notes payable, due 2023
Line of Credit Facility [Line Items]
Face amount					$ 850
Stated interest rate (as a percent)					95.00%
Debt instrument, redemption price, percentage					100.00%
Credit facilities
Line of Credit Facility [Line Items]
Borrowings outstanding							0
Remaining borrowing capacity							5,800
Credit facilities \| Unsecured credit facility, due August 2026
Line of Credit Facility [Line Items]
Face amount		$ 2,250
Debt term		3 years
Borrowings outstanding							0
Credit facilities \| Unsecured credit facility, due August 2026 \| Minimum \| SOFR
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate		0.75%
Credit facilities \| Unsecured credit facility, due August 2026 \| Maximum \| SOFR
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate		1.50%
Credit facilities \| Unsecured credit facility, due August 2023
Line of Credit Facility [Line Items]
Face amount		$ 1,000
Borrowings outstanding							1,000
Credit facilities \| Unsecured credit facility, due August 2023 \| Minimum \| SOFR
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate		0.75%
Credit facilities \| Unsecured credit facility, due August 2023 \| Maximum \| SOFR
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate		1.50%
Credit facilities \| Unsecured credit facility, 3 year term, due 2026
Line of Credit Facility [Line Items]
Face amount			$ 1,000
Borrowings outstanding							1,000
Credit facilities \| Unsecured credit facility, 3 year term, due 2026 \| Minimum \| SOFR
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate			0.875%
Credit facilities \| Unsecured credit facility, 3 year term, due 2026 \| Maximum \| SOFR
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate			1.50%
Credit facilities \| June 17, 2022 revolving credit facility, five-year facility
Line of Credit Facility [Line Items]
Face amount				$ 3,500
Debt term				5 years
Credit facilities \| June 17, 2022 revolving credit facility, 18-month facility
Line of Credit Facility [Line Items]
Face amount				$ 1,500
Debt term				18 months
Borrowings outstanding							$ 0
Credit facilities \| June 17, 2022 revolving credit facility, 18-month facility \| Minimum
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				0.80%
Credit facilities \| June 17, 2022 revolving credit facility, 18-month facility \| Maximum
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				1.50%
Credit facilities \| Delayed draw term loan credit facility
Line of Credit Facility [Line Items]
Face amount						$ 5,000
Credit facilities \| Delayed draw term loan credit facility, 364-day facility \| Term loan
Line of Credit Facility [Line Items]
Face amount						$ 2,000
Debt term						364 days
Credit facilities \| Delayed draw term loan credit facility, 364-day facility \| Term loan \| Eurodollar
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate						0.75%
Credit facilities \| Delayed draw term loan credit facility, two-year facility \| Term loan
Line of Credit Facility [Line Items]
Debt term						2 years
Credit facilities \| Term loan
Line of Credit Facility [Line Items]
Face amount						$ 3,000
Credit facilities \| Term loan \| June 17, 2022 revolving credit facility, five-year facility
Line of Credit Facility [Line Items]
Debt term				5 years
Credit facilities \| Term loan \| June 17, 2022 revolving credit facility, 18-month facility
Line of Credit Facility [Line Items]
Debt term				18 months
Credit facilities \| Term loan \| Delayed draw term loan credit facility, two-year facility
Line of Credit Facility [Line Items]
Face amount						$ 2,000
Debt term						2 years
Credit facilities \| Term loan \| Delayed draw term loan credit facility, two-year facility \| Eurodollar
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate						0.88%
Credit facilities \| Term loan \| Delayed draw term loan credit facility, three-year facility
Line of Credit Facility [Line Items]
Face amount						$ 1,000
Debt term						3 years
Credit facilities \| Term loan \| Delayed draw term loan credit facility, three-year facility \| SOFR
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate						1.05%
Unsecured notes \| 8.125% Notes Payable, Due 2029 \| August 15, 2026
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage	104.00%
Unsecured notes \| 8.125% Notes Payable, Due 2029 \| August 15, 2027
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage	102.00%
Unsecured notes \| 8.125% Notes Payable, Due 2029 \| August 15, 2028
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage	100.00%