Financial Instruments (Derivatives Not Designated As Hedges) (Details) - USD ($)
$ in Millions |
3 Months Ended |
9 Months Ended |
May. 01, 2016 |
May. 03, 2015 |
May. 01, 2016 |
May. 03, 2015 |
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
|
| Amount of Gain or (Loss) Recognized in Earnings on Derivatives |
$ (5)
|
$ (1)
|
$ (4)
|
$ 36
|
| Foreign Exchange Forward Contracts [Member] | Cost Of Products Sold [Member] |
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
|
| Amount of Gain or (Loss) Recognized in Earnings on Derivatives |
1
|
2
|
0
|
2
|
| Foreign Exchange Forward Contracts [Member] | Other expenses / (income) [Member] |
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
|
| Amount of Gain or (Loss) Recognized in Earnings on Derivatives |
2
|
(1)
|
1
|
(1)
|
| Currency Swap [Member] | Other expenses / (income) [Member] |
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
|
| Amount of Gain or (Loss) Recognized in Earnings on Derivatives |
(21)
|
(10)
|
(9)
|
42
|
| Commodity Derivative Contracts [Member] | Cost Of Products Sold [Member] |
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
|
| Amount of Gain or (Loss) Recognized in Earnings on Derivatives |
9
|
6
|
0
|
(12)
|
| Deferred Compensation Derivative Contracts [Member] | General and Administrative Expense [Member] |
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
|
| Amount of Gain or (Loss) Recognized in Earnings on Derivatives |
$ 4
|
$ 2
|
$ 4
|
$ 5
|