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Earnings Per Share (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
 3 Months Ended
Jan. 25, 2015
Jan. 26, 2014
Numerator:    
Net income $ 348us-gaap_NetIncomeLoss $ 253us-gaap_NetIncomeLoss
Denominator:    
Weighted average common shares outstanding (in shares) 1,224us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 1,206us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Effect of dilutive stock options, restricted stock units and employee stock purchase plan shares (in shares) 16us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment 19us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
Denominator for diluted earnings per share (in shares) 1,240us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 1,225us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Basic and diluted (in dollars per share) $ 0.28us-gaap_EarningsPerShareBasicAndDiluted $ 0.21us-gaap_EarningsPerShareBasicAndDiluted
Potentially dilutive securities (in shares) 1us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 1us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount