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Fair Value - Additional Information (Details) - USD ($) $ in Millions	Oct. 30, 2021	Jul. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long term loan receivables and financed service contracts and others carrying value	$ 3,700	$ 4,000
Borrowings, carrying value	9,502	11,526
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Borrowings, fair value	$ 11,500	$ 13,700

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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