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Leases (Reported in Balance Sheet) (Details) - USD ($)
$ in Millions
Jul. 31, 2022
Aug. 01, 2021
Leases [Abstract]    
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Other assets Other assets
Operating Lease, Right-of-Use Asset $ 239 $ 235
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Accrued liabilities Accrued liabilities
Operating Lease, Liability, Current $ 62 $ 54
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Other liabilities Other liabilities
Operating Lease, Liability, Noncurrent $ 177 $ 180
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Plant assets, net of depreciation Plant assets, net of depreciation
Finance Lease, Right-of-Use Asset $ 28 $ 29
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Short-term borrowings Short-term borrowings
Finance Lease, Liability, Current $ 14 $ 11
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Long-term Debt and Lease Obligation Long-term Debt and Lease Obligation
Finance Lease, Liability, Noncurrent $ 16 $ 19