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Valuation And Qualifying Accounts (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
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Jul. 28, 2012
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Jul. 30, 2011
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Jul. 31, 2010
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Lease Receivables
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| Valuation and Qualifying Accounts Disclosure [Line Items] | |||
| Balance at beginning of fiscal year | $ 237 | $ 207 | $ 213 |
| Provisions | 22 | 31 | 25 |
| Write-offs net of recoveries | (2) | (13) | (1) |
| Foreign exchange and other | (10) | 12 | (30) |
| Balance at end of fiscal year | 247 | 237 | 207 |
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Loan Receivables
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| Valuation and Qualifying Accounts Disclosure [Line Items] | |||
| Balance at beginning of fiscal year | 103 | 73 | 88 |
| Provisions | 22 | 43 | 43 |
| Write-offs net of recoveries | (18) | (69) | |
| Foreign exchange and other | (3) | 5 | 11 |
| Balance at end of fiscal year | 122 | 103 | 73 |
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Accounts Receivable
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| Valuation and Qualifying Accounts Disclosure [Line Items] | |||
| Balance at beginning of fiscal year | 204 | 235 | 216 |
| Provisions | 19 | 7 | 44 |
| Write-offs net of recoveries | (16) | (38) | (25) |
| Balance at end of fiscal year | $ 207 | $ 204 | $ 235 |