Fair Value Measurements (Fair Value Measurement Of Assets And Liabilities) (Details) - USD ($) $ in Millions | Jan. 29, 2023 | Jul. 31, 2022 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Derivative assets at fair value | | $ 17 | $ 25 |
Derivatives liabilities at fair value | | 19 | 34 |
Measured On Recurring Basis [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Total assets at fair value | | 18 | 27 |
Total liabilities at fair value | | 123 | 130 |
Measured On Recurring Basis [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 | | 3 | 2 |
Total liabilities at fair value | | 114 | 102 |
Measured On Recurring Basis [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 | | 10 | 21 |
Total liabilities at fair value | | 9 | 28 |
Measured On Recurring Basis [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 | | 5 | 4 |
Measured On Recurring Basis [Member] | Foreign Exchange Forward Contracts [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Derivative assets at fair value | [1] | 3 | 2 |
Derivatives liabilities at fair value | [1] | 1 | 0 |
Measured On Recurring Basis [Member] | Foreign Exchange Forward Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Derivative assets at fair value | [1] | 3 | 2 |
Derivatives liabilities at fair value | [1] | 1 | 0 |
Measured On Recurring Basis [Member] | Commodity Derivative Contracts [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Derivative assets at fair value | [2] | 9 | 23 |
Derivatives liabilities at fair value | [2] | 18 | 30 |
Measured On Recurring Basis [Member] | Commodity Derivative Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Derivative assets at fair value | [2] | 2 | 0 |
Derivatives liabilities at fair value | [2] | 10 | 6 |
Measured On Recurring Basis [Member] | Commodity Derivative Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Derivative assets at fair value | [2] | 2 | 19 |
Derivatives liabilities at fair value | [2] | 8 | 24 |
Measured On Recurring Basis [Member] | Commodity Derivative Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Derivative assets at fair value | [2] | 5 | 4 |
Measured On Recurring Basis [Member] | Equity Contracts [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Derivative assets at fair value | [3] | 5 | 0 |
Derivatives liabilities at fair value | [3] | 0 | 4 |
Measured On Recurring Basis [Member] | Equity Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Derivative assets at fair value | [3] | 5 | 0 |
Derivatives liabilities at fair value | [3] | 0 | 4 |
Measured On Recurring Basis [Member] | Deferred Compensation Investment [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Investments at fair value | [4] | 1 | 2 |
Measured On Recurring Basis [Member] | Deferred Compensation Investment [Member] | Fair Value, Inputs, Level 1 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Investments at fair value | [4] | 1 | 2 |
Measured On Recurring Basis [Member] | Deferred Compensation Obligation [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Deferred compensation obligation | [4] | 104 | 96 |
Measured On Recurring Basis [Member] | Deferred Compensation Obligation [Member] | Fair Value, Inputs, Level 1 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Deferred compensation obligation | [4] | $ 104 | $ 96 |
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[1]Based on observable market transactions of spot currency rates and forward rates.[2]Level 1 and 2 are based on quoted futures exchanges and on observable prices of futures and options transactions in the marketplace. Level 3 is based on unobservable inputs in which there is little or no market data, which requires management’s own assumptions within an internally developed model.[3]Based on index swap rates.[4]Based on the fair value of the participants’ investments. | |