|
Fair Value (Assets and Liabilities Measured At Fair Value On Recurring Basis) (Detail) (USD $)
In Millions, unless otherwise specified
|
Jul. 28, 2012
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Jul. 30, 2011
|
|
Level 1
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
$ 4,126 |
$ 7,213 |
|
Level 2
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
37,560 |
35,662 |
| Liabilities, Fair Value Disclosure |
42 |
24 |
|
Level 2 | Derivative Assets
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
263 |
220 |
|
Level 2 | Derivative Liabilities
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Liabilities, Fair Value Disclosure |
42 |
24 |
|
Level 3
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
1 |
123 |
|
Level 3 | Derivative Assets
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
1 |
2 |
|
Total
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
41,687 |
42,998 |
| Liabilities, Fair Value Disclosure |
42 |
24 |
|
Total | Derivative Assets
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
264 |
222 |
|
Total | Derivative Liabilities
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Liabilities, Fair Value Disclosure |
42 |
24 |
|
Cash Equivalents | Level 1 | Money market funds
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
2,506 |
5,852 |
|
Cash Equivalents | Level 2 | U.S. Government Agency Securities
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
|
1 |
|
Cash Equivalents | Total | Money market funds
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
2,506 |
5,852 |
|
Cash Equivalents | Total | U.S. Government Agency Securities
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
|
1 |
|
Available-For-Sale Investments | Level 1 | Publicly Traded Equity Securities
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
1,620 |
1,361 |
|
Available-For-Sale Investments | Level 2 | U.S. Government Securities
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
24,241 |
19,139 |
|
Available-For-Sale Investments | Level 2 | U.S. Government Agency Securities
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
5,388 |
8,776 |
|
Available-For-Sale Investments | Level 2 | Non-U.S. Government And Agency Securities
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
1,638 |
3,132 |
|
Available-For-Sale Investments | Level 2 | Corporate Debt Securities
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
6,030 |
4,394 |
|
Available-For-Sale Investments | Level 3 | Asset-Backed Securities
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
|
121 |
|
Available-For-Sale Investments | Total | U.S. Government Securities
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
24,241 |
19,139 |
|
Available-For-Sale Investments | Total | U.S. Government Agency Securities
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
5,388 |
8,776 |
|
Available-For-Sale Investments | Total | Non-U.S. Government And Agency Securities
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
1,638 |
3,132 |
|
Available-For-Sale Investments | Total | Corporate Debt Securities
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
6,030 |
4,394 |
|
Available-For-Sale Investments | Total | Asset-Backed Securities
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
|
121 |
|
Available-For-Sale Investments | Total | Publicly Traded Equity Securities
|
|
|
| Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Assets, fair value measurements |
$ 1,620 |
$ 1,361 |