Fair Value Measurements (Fair Value Measurement Of Assets And Liabilities) (Details) (Measured On Recurring Basis [Member], USD $) | Apr. 27, 2014 | Jul. 28, 2013 |
In Millions, unless otherwise specified |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | $27 | | $32 | |
Total liabilities at fair value | 127 | | 159 | |
Fair Value, Inputs, Level 1 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | 7 | | 2 | |
Total liabilities at fair value | 122 | | 128 | |
Fair Value, Inputs, Level 2 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | 20 | | 30 | |
Total liabilities at fair value | 5 | | 31 | |
Fair Value, Inputs, Level 3 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | ' | | ' | |
Total liabilities at fair value | ' | | ' | |
Interest Rate Swap [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | 0 | [1] | 1 | [1] |
Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | ' | | ' | |
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | 0 | [1] | 1 | [1] |
Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | ' | | ' | |
Interest Rate Contract [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | 17 | [1] | 23 | [1] |
Interest Rate Contract [Member] | Fair Value, Inputs, Level 1 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | ' | | ' | |
Interest Rate Contract [Member] | Fair Value, Inputs, Level 2 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | 17 | [1] | 23 | [1] |
Interest Rate Contract [Member] | Fair Value, Inputs, Level 3 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | ' | | ' | |
Foreign Exchange Forward Contracts [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | 3 | [2] | 4 | [2] |
Total liabilities at fair value | 2 | [2] | 6 | [2] |
Foreign Exchange Forward Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | ' | | ' | |
Total liabilities at fair value | ' | | ' | |
Foreign Exchange Forward Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | 3 | [2] | 4 | [2] |
Total liabilities at fair value | 2 | [2] | 6 | [2] |
Foreign Exchange Forward Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | ' | | ' | |
Total liabilities at fair value | ' | | ' | |
Cross-Currency Swap Contracts [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total liabilities at fair value | 3 | [3] | 24 | [3] |
Cross-Currency Swap Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total liabilities at fair value | ' | | ' | |
Cross-Currency Swap Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total liabilities at fair value | 3 | [3] | 24 | [3] |
Cross-Currency Swap Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total liabilities at fair value | ' | | ' | |
Commodity Derivative Contracts [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | 7 | [4] | 2 | [4] |
Total liabilities at fair value | 0 | [4] | 6 | [4] |
Commodity Derivative Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | 7 | [4] | 2 | [4] |
Total liabilities at fair value | 0 | [4] | 5 | [4] |
Commodity Derivative Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | ' | [4] | ' | [4] |
Total liabilities at fair value | 0 | [4] | 1 | [4] |
Commodity Derivative Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | ' | | ' | |
Total liabilities at fair value | ' | | ' | |
Deferred Compensation Derivative Contracts [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | 0 | [5] | 2 | [5] |
Deferred Compensation Derivative Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | ' | | ' | |
Deferred Compensation Derivative Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | 0 | [5] | 2 | [5] |
Deferred Compensation Derivative Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total assets at fair value | ' | | ' | |
Deferred Compensation Obligation [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total liabilities at fair value | 122 | [6] | 123 | [6] |
Deferred Compensation Obligation [Member] | Fair Value, Inputs, Level 1 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total liabilities at fair value | 122 | [6] | 123 | [6] |
Deferred Compensation Obligation [Member] | Fair Value, Inputs, Level 2 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total liabilities at fair value | ' | | ' | |
Deferred Compensation Obligation [Member] | Fair Value, Inputs, Level 3 [Member] | ' | | ' | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' | |
Total liabilities at fair value | ' | | ' | |
|
[1] | Based on LIBOR swap rates. |
[2] | Based on observable market transactions of spot currency rates and forward rates. |
[3] | Based on observable local benchmarks for currency and interest rates. |
[4] | Based on quoted futures exchanges and on observable prices of futures and options transactions in the marketplace. |
[5] | Based on LIBOR and equity index swap rates. |
[6] | Based on the fair value of the participantsb investments. |