Financing Receivables - Schedule of Financing Receivables Categorized by Internal Credit Risk Rating (Details) - USD ($) $ in Millions	Apr. 26, 2025	Jul. 27, 2024
Financing Receivable, Credit Quality Indicator [Line Items]
Origination year - Prior	$ 24	$ 9
Origination year - Fiscal Year One	222	127
Origination year - Fiscal Year Two	381	539
Origination year - Fiscal Year Three	925	852
Origination year - Fiscal Year Four	2,320	1,694
Origination year - Fiscal Year Five	2,326	3,491
Gross	6,198	6,712
Loan Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Origination year - Prior	22	7
Origination year - Fiscal Year One	197	108
Origination year - Fiscal Year Two	321	478
Origination year - Fiscal Year Three	702	759
Origination year - Fiscal Year Four	1,974	1,385
Origination year - Fiscal Year Five	2,060	3,121
Gross	5,276	5,858
Lease Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Origination year - Prior	2	2
Origination year - Fiscal Year One	25	19
Origination year - Fiscal Year Two	60	61
Origination year - Fiscal Year Three	223	93
Origination year - Fiscal Year Four	346	309
Origination year - Fiscal Year Five	266	370
Gross	922	854
1 to 4 | Loan Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Origination year - Prior	15	2
Origination year - Fiscal Year One	121	78
Origination year - Fiscal Year Two	251	341
Origination year - Fiscal Year Three	462	555
Origination year - Fiscal Year Four	1,310	945
Origination year - Fiscal Year Five	1,138	1,803
Gross	3,297	3,724
1 to 4 | Lease Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Origination year - Prior	1	1
Origination year - Fiscal Year One	15	8
Origination year - Fiscal Year Two	31	38
Origination year - Fiscal Year Three	141	46
Origination year - Fiscal Year Four	224	176
Origination year - Fiscal Year Five	187	341
Gross	599	610
5 to 6 | Loan Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Origination year - Prior	6	2
Origination year - Fiscal Year One	41	29
Origination year - Fiscal Year Two	62	127
Origination year - Fiscal Year Three	238	130
Origination year - Fiscal Year Four	655	426
Origination year - Fiscal Year Five	910	1,314
Gross	1,912	2,028
5 to 6 | Lease Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Origination year - Prior	1	1
Origination year - Fiscal Year One	9	11
Origination year - Fiscal Year Two	28	22
Origination year - Fiscal Year Three	79	44
Origination year - Fiscal Year Four	116	129
Origination year - Fiscal Year Five	79	21
Gross	312	228
7 and Higher | Loan Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Origination year - Prior	1	3
Origination year - Fiscal Year One	35	1
Origination year - Fiscal Year Two	8	10
Origination year - Fiscal Year Three	2	74
Origination year - Fiscal Year Four	9	14
Origination year - Fiscal Year Five	12	4
Gross	67	106
7 and Higher | Lease Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Origination year - Prior	0	0
Origination year - Fiscal Year One	1	0
Origination year - Fiscal Year Two	1	1
Origination year - Fiscal Year Three	3	3
Origination year - Fiscal Year Four	6	4
Origination year - Fiscal Year Five	0	8
Gross	$ 11	$ 16