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Fair Value Measurements (Fair Value of Financial Instruments) (Details) - USD ($) $ in Millions	May 31, 2022	May 04, 2022	Aug. 31, 2021	Jul. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	$ 2,875		$ 2,878
Senior Notes \| 4.700% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate (as a percent)	4.70%
Carrying Amount	$ 0		499
Senior Notes \| 4.900% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate (as a percent)	4.90%
Carrying Amount	$ 300		300
Senior Notes \| 3.950% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate (as a percent)	3.95%
Carrying Amount	$ 497		496
Senior Notes \| 3.600% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate (as a percent)	3.60%
Carrying Amount	$ 496		495
Senior Notes \| 3.000% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate (as a percent)	3.00%			3.00%
Carrying Amount	$ 592		591
Senior Notes \| 1.700% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate (as a percent)	1.70%
Carrying Amount	$ 496		496
Senior Notes \| 4.250% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate (as a percent)	4.25%	4.25%
Carrying Amount	$ 493		0
Senior Notes \| Carrying Amount \| Level 2 \| 4.700% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	0		499
Senior Notes \| Carrying Amount \| Level 2 \| 3.950% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	497		496
Senior Notes \| Carrying Amount \| Level 2 \| 3.600% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	496		495
Senior Notes \| Carrying Amount \| Level 2 \| 3.000% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	592		591
Senior Notes \| Carrying Amount \| Level 2 \| 1.700% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	496		496
Senior Notes \| Carrying Amount \| Level 2 \| 4.250% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	493		0
Senior Notes \| Carrying Amount \| Level 3 \| 4.900% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	300		300
Senior Notes \| Fair Value \| Level 2 \| 4.700% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	0		521
Senior Notes \| Fair Value \| Level 2 \| 3.950% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	492		555
Senior Notes \| Fair Value \| Level 2 \| 3.600% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	459		541
Senior Notes \| Fair Value \| Level 2 \| 3.000% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	522		618
Senior Notes \| Fair Value \| Level 2 \| 1.700% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	455		504
Senior Notes \| Fair Value \| Level 2 \| 4.250% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	497		0
Senior Notes \| Fair Value \| Level 3 \| 4.900% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	$ 305		$ 322