v2.4.1.9

Employee Benefit Plans (Summary Assumptions Related To And Valuation Of Employee Share-Based Awards (Time-Based Restricted Stock Units)) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
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Apr. 25, 2015 | Apr. 26, 2014 | Apr. 25, 2015 | Apr. 26, 2014
RESTRICTED STOCK UNITS |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares granted (in millions) | 33 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember | 6 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember | 44 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember | 53 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember
Grant date fair value per share | $ 25.31 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember | $ 19.95 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember | $ 24.83 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember | $ 20.50 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember
Expected dividend | 2.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember | 3.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember | 2.90%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember | 3.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember
Range of Risk Free Interest Rate, Minimum | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember
Range of Risk Free Interest Rate, Maximum | 1.40%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember | 1.70%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember | 1.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember | 1.70%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember
PERFORMANCE RESTRICTED STOCK UNITS |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares granted (in millions) | 1 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember | 2 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember | 8 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember | 6 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember
Grant date fair value per share | $ 25.87 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember | $ 19.85 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember | $ 23.97 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember | $ 21.73 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember
Expected dividend | 3.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember | 3.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember | 3.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember | 2.70%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember
Range of Risk Free Interest Rate, Minimum | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember | 0.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember
Range of Risk Free Interest Rate, Maximum | 1.40%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember | 1.70%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember | 1.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember | 1.70%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember
Range of Expected Volatility Rate, Minimum |  |  | 14.40%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember | 17.40%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember
Range of Expected Volatility Rate, Maximum |  |  | 70.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember | 70.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember

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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References No definition available. + Details
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- Definition The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References No definition available. + Details
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- Definition The maximum risk-free interest rate assumption that is used in valuing an option on its own shares. + References No definition available. + Details
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- Definition The minimum risk-free interest rate assumption that is used in valuing an option on its own shares. + References No definition available. + Details
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- Definition Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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