Financing Receivables - Schedule of Financing Receivables Categorized by Internal Credit Risk Rating (Details) - USD ($) $ in Millions	Oct. 26, 2024	Jul. 27, 2024
Financing Receivable, Credit Quality Indicator [Line Items]
Origination year - Prior	$ 90	$ 9
Origination year - Fiscal Year One	377	127
Origination year - Fiscal Year Two	702	539
Origination year - Fiscal Year Three	1,402	852
Origination year - Fiscal Year Four	2,962	1,694
Origination year - Fiscal Year Five	999	3,491
Gross	6,532	6,712
Loan Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Origination year - Prior	77	7
Origination year - Fiscal Year One	326	108
Origination year - Fiscal Year Two	614	478
Origination year - Fiscal Year Three	1,104	759
Origination year - Fiscal Year Four	2,554	1,385
Origination year - Fiscal Year Five	908	3,121
Gross	5,583	5,858
Lease Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Origination year - Prior	13	2
Origination year - Fiscal Year One	51	19
Origination year - Fiscal Year Two	88	61
Origination year - Fiscal Year Three	298	93
Origination year - Fiscal Year Four	408	309
Origination year - Fiscal Year Five	91	370
Gross	949	854
1 to 4 | Loan Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Origination year - Prior	53	2
Origination year - Fiscal Year One	256	78
Origination year - Fiscal Year Two	449	341
Origination year - Fiscal Year Three	736	555
Origination year - Fiscal Year Four	1,613	945
Origination year - Fiscal Year Five	504	1,803
Gross	3,611	3,724
1 to 4 | Lease Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Origination year - Prior	7	1
Origination year - Fiscal Year One	34	8
Origination year - Fiscal Year Two	50	38
Origination year - Fiscal Year Three	195	46
Origination year - Fiscal Year Four	276	176
Origination year - Fiscal Year Five	63	341
Gross	625	610
5 to 6 | Loan Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Origination year - Prior	20	2
Origination year - Fiscal Year One	65	29
Origination year - Fiscal Year Two	107	127
Origination year - Fiscal Year Three	360	130
Origination year - Fiscal Year Four	939	426
Origination year - Fiscal Year Five	404	1,314
Gross	1,895	2,028
5 to 6 | Lease Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Origination year - Prior	6	1
Origination year - Fiscal Year One	16	11
Origination year - Fiscal Year Two	36	22
Origination year - Fiscal Year Three	99	44
Origination year - Fiscal Year Four	126	129
Origination year - Fiscal Year Five	28	21
Gross	311	228
7 and Higher | Loan Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Origination year - Prior	4	3
Origination year - Fiscal Year One	5	1
Origination year - Fiscal Year Two	58	10
Origination year - Fiscal Year Three	8	74
Origination year - Fiscal Year Four	2	14
Origination year - Fiscal Year Five	0	4
Gross	77	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	2	1
Origination year - Fiscal Year Three	4	3
Origination year - Fiscal Year Four	6	4
Origination year - Fiscal Year Five	0	8
Gross	$ 13	$ 16