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
	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)	33us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember	6us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember	44us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember	53us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember
Grant date fair value per share	$ 25.31us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember	$ 19.95us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember	$ 24.83us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_RestrictedStockMember	$ 20.50us-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)	1us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember	2us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember	8us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember	6us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember
Grant date fair value per share	$ 25.87us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember	$ 19.85us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember	$ 23.97us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PerformanceSharesMember	$ 21.73us-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

X

- 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

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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

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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.

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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.

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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.

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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.

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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

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