Financing Receivables - Schedule of Financing Receivables Categorized by Internal Credit Risk Rating (Details) - USD ($) $ in Millions	Jul. 30, 2022	Jul. 31, 2021
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