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Financing Receivables - Schedule of Financing Receivables Categorized by Internal Credit Risk Rating (Details) - USD ($) $ in Millions | Oct. 24, 2020 | Jul. 25, 2020
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross | $ 10,656 | $ 10,780
Lease Receivables |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 38 |
Origination year - Fiscal Year 2017 | 128 |
Origination year - Fiscal Year 2018 | 326 |
Origination year - Fiscal Year 2019 | 584 |
Origination year - Fiscal Year 2020 | 799 |
Origination year - Fiscal Year 2021 | 83 |
Gross | 1,958 | 2,013
Loan Receivables |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 49 |
Origination year - Fiscal Year 2017 | 260 |
Origination year - Fiscal Year 2018 | 641 |
Origination year - Fiscal Year 2019 | 1,386 |
Origination year - Fiscal Year 2020 | 2,379 |
Origination year - Fiscal Year 2021 | 1,239 |
Gross | 5,954 | 5,937
Financed Service Contracts |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 6 |
Origination year - Fiscal Year 2017 | 92 |
Origination year - Fiscal Year 2018 | 164 |
Origination year - Fiscal Year 2019 | 547 |
Origination year - Fiscal Year 2020 | 1,033 |
Origination year - Fiscal Year 2021 | 902 |
Gross | 2,744 | 2,830
1 to 4 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross |  | 6,445
1 to 4 | Lease Receivables |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 17 |
Origination year - Fiscal Year 2017 | 60 |
Origination year - Fiscal Year 2018 | 166 |
Origination year - Fiscal Year 2019 | 263 |
Origination year - Fiscal Year 2020 | 389 |
Origination year - Fiscal Year 2021 | 25 |
Gross | 920 | 992
1 to 4 | Loan Receivables |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 30 |
Origination year - Fiscal Year 2017 | 170 |
Origination year - Fiscal Year 2018 | 458 |
Origination year - Fiscal Year 2019 | 858 |
Origination year - Fiscal Year 2020 | 1,430 |
Origination year - Fiscal Year 2021 | 793 |
Gross | 3,739 | 3,808
1 to 4 | Financed Service Contracts |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 4 |
Origination year - Fiscal Year 2017 | 56 |
Origination year - Fiscal Year 2018 | 88 |
Origination year - Fiscal Year 2019 | 246 |
Origination year - Fiscal Year 2020 | 555 |
Origination year - Fiscal Year 2021 | 634 |
Gross | 1,583 | 1,645
5 to 6 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross |  | 4,066
5 to 6 | Lease Receivables |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 17 |
Origination year - Fiscal Year 2017 | 65 |
Origination year - Fiscal Year 2018 | 151 |
Origination year - Fiscal Year 2019 | 300 |
Origination year - Fiscal Year 2020 | 389 |
Origination year - Fiscal Year 2021 | 54 |
Gross | 976 | 952
5 to 6 | Loan Receivables |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 16 |
Origination year - Fiscal Year 2017 | 87 |
Origination year - Fiscal Year 2018 | 174 |
Origination year - Fiscal Year 2019 | 456 |
Origination year - Fiscal Year 2020 | 887 |
Origination year - Fiscal Year 2021 | 441 |
Gross | 2,061 | 1,961
5 to 6 | Financed Service Contracts |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 2 |
Origination year - Fiscal Year 2017 | 36 |
Origination year - Fiscal Year 2018 | 73 |
Origination year - Fiscal Year 2019 | 285 |
Origination year - Fiscal Year 2020 | 465 |
Origination year - Fiscal Year 2021 | 267 |
Gross | 1,128 | 1,153
7 and Higher |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross |  | 269
7 and Higher | Lease Receivables |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 4 |
Origination year - Fiscal Year 2017 | 3 |
Origination year - Fiscal Year 2018 | 9 |
Origination year - Fiscal Year 2019 | 21 |
Origination year - Fiscal Year 2020 | 21 |
Origination year - Fiscal Year 2021 | 4 |
Gross | 62 | 69
7 and Higher | Loan Receivables |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 3 |
Origination year - Fiscal Year 2017 | 3 |
Origination year - Fiscal Year 2018 | 9 |
Origination year - Fiscal Year 2019 | 72 |
Origination year - Fiscal Year 2020 | 62 |
Origination year - Fiscal Year 2021 | 5 |
Gross | 154 | 168
7 and Higher | Financed Service Contracts |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 0 |
Origination year - Fiscal Year 2017 | 0 |
Origination year - Fiscal Year 2018 | 3 |
Origination year - Fiscal Year 2019 | 16 |
Origination year - Fiscal Year 2020 | 13 |
Origination year - Fiscal Year 2021 | 1 |
Gross | $ 33 | $ 32

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