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Fair Value Measurements (Tables)
 3 Months Ended
Oct. 31, 2021
Fair Value Disclosures [Abstract]  
Fair Value, Assets And Liabilities Measured on Recurring Basis [Table Text Block]
The following table presents our financial assets and liabilities that are measured at fair value on a recurring basis as of October 31, 2021, and August 1, 2021, consistent with the fair value hierarchy:
 Fair Value
as of
October 31,
2021		Fair Value Measurements at
October 31, 2021 Using
Fair Value Hierarchy		Fair Value
as of
August 1,
2021		Fair Value Measurements at
August 1, 2021 Using
Fair Value Hierarchy
 Level 1Level 2Level 3Level 1Level 2Level 3
Assets
Foreign exchange forward contracts(1)
$— $— $— $— $1 $— $1 $— 
Commodity derivative contracts(2)
54 21 32 1 53 21 31 1 
Deferred compensation derivative contracts(3)
2 — 2 — 3 — 3 — 
Deferred compensation investments(4)
3 3 — — 3 3 — — 
Total assets at fair value$59 $24 $34 $1 $60 $24 $35 $1 
 Fair Value
as of
October 31,
2021		Fair Value Measurements at
October 31, 2021 Using
Fair Value Hierarchy		Fair Value
as of
August 1,
2021		Fair Value Measurements at
August 1, 2021 Using
Fair Value Hierarchy
 Level 1Level 2Level 3Level 1Level 2Level 3
Liabilities
Foreign exchange forward contracts(1)
$2 $— $2 $— $3 $— $3 $— 
Commodity derivative contracts(2)
1 1 — — — — — — 
Deferred compensation obligation(4)
109 109 — — 105 105 — — 
Total liabilities at fair value$112 $110 $2 $— $108 $105 $3 $— 
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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 LIBOR and equity index swap rates.
(4)Based on the fair value of the participants’ investments.