Financial Instruments (Derivatives Not Designated As Hedges) (Details) - USD ($)
$ in Millions |
3 Months Ended |
6 Months Ended |
Jan. 31, 2016 |
Feb. 01, 2015 |
Jan. 31, 2016 |
Feb. 01, 2015 |
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
|
| Amount of Gain or (Loss) Recognized in Earnings on Derivatives |
$ 3
|
$ 25
|
$ 1
|
$ 37
|
| 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)
|
(1)
|
(1)
|
0
|
| 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 |
(1)
|
0
|
(1)
|
0
|
| Currency Swap [Member] | Other expenses / (income) [Member] |
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
|
| Amount of Gain or (Loss) Recognized in Earnings on Derivatives |
12
|
38
|
12
|
52
|
| 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 |
(7)
|
(13)
|
(9)
|
(18)
|
| 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 |
$ 0
|
$ 1
|
$ 0
|
$ 3
|