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Warranty, Guarantees And Contingencies (Tables)
 3 Months Ended
Jan. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Changes in the warranty reserves
Changes in the warranty reserves are presented below:
 
 
Three Months Ended
 
January 31,
2016
 
January 25,
2015
 
 
 
 
 
(In millions)
Beginning balance
$
126

 
$
113

Provisions for warranty
26

 
37

Releases of reserves related to preexisting warranty
(11
)
 
(1
)
Consumption of reserves
(22
)
 
(30
)
Ending balance
$
119

 
$
119