Borrowings - Short and Long-Term Debt (Details) - USD ($) $ in Millions		9 Months Ended
	Jun. 01, 2016	May 31, 2017	Aug. 31, 2016
Debt Instrument [Line Items]
Total short-term borrowings		$ 4,838	$ 323
Other		25	32
Total long-term debt, less current portion		$ 14,372	18,705
Unsecured Pound Sterling variable rate term loan due 2019
Debt Instrument [Line Items]
Maturity year		2019
Other
Debt Instrument [Line Items]
Total short-term borrowings		$ 497	260
1.750% unsecured notes due 2018
Debt Instrument [Line Items]
Net proceeds from notes payable	$ 1,200
Stated interest rate	1.75%
2.600% unsecured notes due 2021
Debt Instrument [Line Items]
Net proceeds from notes payable	$ 1,500
Stated interest rate	2.60%
3.100% unsecured notes due 2023
Debt Instrument [Line Items]
Net proceeds from notes payable	$ 800
Stated interest rate	3.10%
3.450% unsecured notes due 2026
Debt Instrument [Line Items]
Net proceeds from notes payable	$ 1,900
Stated interest rate	3.45%
4.650% unsecured notes due 2046
Debt Instrument [Line Items]
Net proceeds from notes payable	$ 600
Stated interest rate	4.65%
Term Loan | Unsecured Pound Sterling variable rate term loan due 2019
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		1,736	1,833
Unsecured Notes | 1.750% unsecured notes due 2017
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		$ 0	746
Stated interest rate		1.75%
Maturity year		2017
Unsecured Notes | 1.750% unsecured notes due 2018
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		$ 0	1,246
Stated interest rate		1.75%
Maturity year		2018
Unsecured Notes | 2.600% unsecured notes due 2021
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		$ 0	1,493
Stated interest rate		2.60%
Maturity year		2021
Unsecured Notes | 3.100% unsecured notes due 2023
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		$ 0	744
Stated interest rate		3.10%
Maturity year		2023
Unsecured Notes | 3.450% unsecured notes due 2026
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		$ 1,886	1,885
Stated interest rate		3.45%
Maturity year		2026
Unsecured Notes | 4.650% unsecured notes due 2046
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		$ 590	590
Stated interest rate		4.65%
Maturity year		2046
Unsecured Notes | 2.700% unsecured notes due 2019
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		$ 1,246	1,244
Stated interest rate		2.70%
Maturity year		2019
Unsecured Notes | 3.300% unsecured notes due 2021
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		$ 1,243	1,242
Stated interest rate		3.30%
Maturity year		2021
Unsecured Notes | 3.800% unsecured notes due 2024
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		$ 1,988	1,987
Stated interest rate		3.80%
Maturity year		2024
Unsecured Notes | 4.500% unsecured notes due 2034
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		$ 495	494
Stated interest rate		4.50%
Maturity year		2034
Unsecured Notes | 4.800% unsecured notes due 2044
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		$ 1,492	1,492
Stated interest rate		4.80%
Maturity year		2044
Unsecured Notes | 2.875% unsecured Pound Sterling notes due 2020
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		$ 513	521
Stated interest rate		2.875%
Maturity year		2020
Unsecured Notes | 3.600% unsecured Pound Sterling notes due 2025
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		$ 384	391
Stated interest rate		3.60%
Maturity year		2025
Unsecured Notes | 2.125% unsecured Euro notes due 2026
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		$ 838	830
Stated interest rate		2.125%
Maturity year		2026
Unsecured Notes | 3.100% unsecured notes due 2022
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		$ 1,194	1,194
Stated interest rate		3.10%
Maturity year		2022
Unsecured Notes | 4.400% unsecured notes due 2042
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		$ 492	492
Stated interest rate		4.40%
Maturity year		2042
Unsecured Notes | 5.250% unsecured notes due 2019
Debt Instrument [Line Items]
Carrying value of notes, net of unamortized discount and interest rate swap FMV adjustment		$ 250	249
Stated interest rate		5.25%
Maturity year		2019
Notes Payable | 1.750% unsecured notes due 2017
Debt Instrument [Line Items]
Total short-term borrowings		$ 749	0
Stated interest rate		1.75%
Maturity year		2017
Notes Payable | 1.750% unsecured notes due 2018
Debt Instrument [Line Items]
Total short-term borrowings		$ 1,248	0
Notes Payable | 2.600% unsecured notes due 2021
Debt Instrument [Line Items]
Total short-term borrowings		1,494	0
Notes Payable | 3.100% unsecured notes due 2023
Debt Instrument [Line Items]
Total short-term borrowings		745	0
Term Loan | Unsecured Pound Sterling variable rate term loan due 2019
Debt Instrument [Line Items]
Total short-term borrowings		$ 105	$ 63
Maturity year		2019