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Financing Receivables and Operating Leases (Schedule Of Contractual Maturities Of Gross Lease Receivables) (Details)
$ in Millions
Jul. 25, 2015
USD ($)
Financing Receivables And Guarantees [Abstract]  
2016 $ 1,613
2017 999
2018 503
2019 202
2020 44
Total $ 3,361