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Financing Receivables - Schedule of Financing Receivables Categorized by Internal Credit Risk Rating (Details) - USD ($) $ in Millions | Jul. 30, 2022 | Jul. 31, 2021
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Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | $ 7 | $ 8
Origination year - Fiscal Year 2018/2017 | 103 | 190
Origination year - Fiscal Year 2019/2018 | 455 | 437
Origination year - Fiscal Year 2020/2019 | 1,208 | 1,413
Origination year - Fiscal Year 2021/2020 | 2,549 | 2,689
Origination year - Fiscal Year 2022/2021 | 3,642 | 4,551
Total | 7,964 | 9,288
Lease Receivables |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 3 | 3
Origination year - Fiscal Year 2018/2017 | 36 | 39
Origination year - Fiscal Year 2019/2018 | 145 | 171
Origination year - Fiscal Year 2020/2019 | 282 | 367
Origination year - Fiscal Year 2021/2020 | 343 | 590
Origination year - Fiscal Year 2022/2021 | 313 | 462
Total | 1,122 | 1,632
Lease Receivables | 1 to 4 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 2 | 2
Origination year - Fiscal Year 2018/2017 | 25 | 20
Origination year - Fiscal Year 2019/2018 | 74 | 100
Origination year - Fiscal Year 2020/2019 | 124 | 168
Origination year - Fiscal Year 2021/2020 | 176 | 282
Origination year - Fiscal Year 2022/2021 | 152 | 227
Total | 553 | 799
Lease Receivables | 5 to 6 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 1 | 1
Origination year - Fiscal Year 2018/2017 | 10 | 17
Origination year - Fiscal Year 2019/2018 | 67 | 65
Origination year - Fiscal Year 2020/2019 | 146 | 187
Origination year - Fiscal Year 2021/2020 | 165 | 285
Origination year - Fiscal Year 2022/2021 | 151 | 231
Total | 540 | 786
Lease Receivables | 7 and Higher |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 0 | 0
Origination year - Fiscal Year 2018/2017 | 1 | 2
Origination year - Fiscal Year 2019/2018 | 4 | 6
Origination year - Fiscal Year 2020/2019 | 12 | 12
Origination year - Fiscal Year 2021/2020 | 2 | 23
Origination year - Fiscal Year 2022/2021 | 10 | 4
Total | 29 | 47
Loan Receivables |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 3 | 5
Origination year - Fiscal Year 2018/2017 | 57 | 107
Origination year - Fiscal Year 2019/2018 | 227 | 213
Origination year - Fiscal Year 2020/2019 | 738 | 829
Origination year - Fiscal Year 2021/2020 | 1,398 | 1,538
Origination year - Fiscal Year 2022/2021 | 2,233 | 2,511
Total | 4,656 | 5,203
Loan Receivables | 1 to 4 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 1 | 4
Origination year - Fiscal Year 2018/2017 | 46 | 86
Origination year - Fiscal Year 2019/2018 | 136 | 134
Origination year - Fiscal Year 2020/2019 | 458 | 577
Origination year - Fiscal Year 2021/2020 | 896 | 990
Origination year - Fiscal Year 2022/2021 | 1,488 | 1,552
Total | 3,025 | 3,343
Loan Receivables | 5 to 6 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 1 | 0
Origination year - Fiscal Year 2018/2017 | 10 | 19
Origination year - Fiscal Year 2019/2018 | 71 | 75
Origination year - Fiscal Year 2020/2019 | 242 | 202
Origination year - Fiscal Year 2021/2020 | 465 | 505
Origination year - Fiscal Year 2022/2021 | 733 | 925
Total | 1,522 | 1,726
Loan Receivables | 7 and Higher |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 1 | 1
Origination year - Fiscal Year 2018/2017 | 1 | 2
Origination year - Fiscal Year 2019/2018 | 20 | 4
Origination year - Fiscal Year 2020/2019 | 38 | 50
Origination year - Fiscal Year 2021/2020 | 37 | 43
Origination year - Fiscal Year 2022/2021 | 12 | 34
Total | 109 | 134
Financed Service Contracts |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 1 | 0
Origination year - Fiscal Year 2018/2017 | 10 | 44
Origination year - Fiscal Year 2019/2018 | 83 | 53
Origination year - Fiscal Year 2020/2019 | 188 | 217
Origination year - Fiscal Year 2021/2020 | 808 | 561
Origination year - Fiscal Year 2022/2021 | 1,096 | 1,578
Total | 2,186 | 2,453
Financed Service Contracts | 1 to 4 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 1 | 0
Origination year - Fiscal Year 2018/2017 | 3 | 38
Origination year - Fiscal Year 2019/2018 | 37 | 26
Origination year - Fiscal Year 2020/2019 | 78 | 106
Origination year - Fiscal Year 2021/2020 | 562 | 252
Origination year - Fiscal Year 2022/2021 | 799 | 1,053
Total | 1,480 | 1,475
Financed Service Contracts | 5 to 6 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 0 | 0
Origination year - Fiscal Year 2018/2017 | 7 | 6
Origination year - Fiscal Year 2019/2018 | 44 | 26
Origination year - Fiscal Year 2020/2019 | 103 | 105
Origination year - Fiscal Year 2021/2020 | 244 | 302
Origination year - Fiscal Year 2022/2021 | 297 | 520
Total | 695 | 959
Financed Service Contracts | 7 and Higher |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Origination year - Prior | 0 | 0
Origination year - Fiscal Year 2018/2017 | 0 | 0
Origination year - Fiscal Year 2019/2018 | 2 | 1
Origination year - Fiscal Year 2020/2019 | 7 | 6
Origination year - Fiscal Year 2021/2020 | 2 | 7
Origination year - Fiscal Year 2022/2021 | 0 | 5
Total | $ 11 | $ 19

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