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Financing Receivables and Operating Leases - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Jul. 27, 2019 | Jul. 28, 2018
Financing Receivables And Guarantees [Line Items] |  |
Average lease term | 4 years |
Threshold for past due receivables | 31 days |
Unbilled or current financing receivables included in greater than 91 days plus past due | $ 244 | $ 503
Financing receivable 91 days past due and still accruing | $ 215 | $ 182
Maximum |  |
Financing Receivables And Guarantees [Line Items] |  |
Loan receivables term | 3 years |
Financed service contracts term | 3 years |
Maximum | Financed Service Contracts |  |
Financing Receivables And Guarantees [Line Items] |  |
Financed service contracts term | 3 years |
Minimum |  |
Financing Receivables And Guarantees [Line Items] |  |
Financed service contracts term | 1 year |
Minimum | Financed Service Contracts |  |
Financing Receivables And Guarantees [Line Items] |  |
Financed service contracts term | 1 year |

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