Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
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Market value related to the hedged item in an interest rate fair value hedge, offset by the gain (loss) on the hedging instrument to the extent that the fair value hedge is determined to be effective.

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No definition available.

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Market value of outstanding interest rate swap agreements designated as fair value hedging instruments, as offset by the gain (loss) on the hedged item to the extent that the fair value hedge is determined to be effective.

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Balance of unrealized gain (loss) related to derivatives designated as cash flow hedging instruments, recorded in other comprehensive income (loss) to the extent that the cash flow hedge is determined to be ineffective.

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Amount of unrealized gain (loss), net of tax as of the balance sheet date, related to the increase or decrease in fair value of interest rate derivatives designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income to the extent that the cash flow hedge was determined to be effective.

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The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Average fixed interest rate related to the group of interest rate derivatives.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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The net gain (loss) during the reporting period due to ineffectiveness in foreign currency cash flow hedges. Recognized in earnings.

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Aggregate impact of foreign currency derivatives on earnings for the period. Includes impact of foreign currency cash flow hedge ineffectiveness and the ineffectiveness of fair value hedging derivatives and full change in fair value of the foreign currency derivatives not designated as hedging instruments.

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The net gain (loss) during the reporting period due to ineffectiveness in interest rate cash flow hedges. Recognized in earnings.

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Maximum amount of time remaining before foreign currency exchange rate derivatives mature or expire, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The cash outflow for a financial contract that meets the hedge criteria as either cash flow hedge, fair value hedge or hedge of net investment in foreign operations.

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Derivatives and Foreign Exchange Risk Management - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Oct. 30, 2015	Oct. 24, 2014	Oct. 30, 2015	Oct. 24, 2014	Apr. 24, 2015
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Currency exchange rate gains (losses)	$ 55,000,000	$ 14,000,000	$ 98,000,000	$ 2,000,000
Gains (losses) relating to ineffectiveness of foreign currency cash flow hedges	0	0	0	0
Gain (losses) relating to ineffectiveness of forward starting interest rate derivatives	0	0	0	0
After-tax net unrealized gains (losses) associated with cash flow hedging instruments recorded in AOCI	154,000,000		154,000,000		$ 210,000,000
Cash flow hedge unrealized gains to be reclassified over the next 12 months			166,000,000
Gains (losses) relating to ineffectiveness of interest rate fair value hedges	0	0	0	0
Cash flow hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Effective portion of net gains (losses) on derivative instruments reclassified from accumulated other comprehensive loss	74,000,000	21,000,000	148,000,000	19,000,000
Foreign currency exchange rate contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount	10,086,000,000		10,086,000,000		9,782,000,000
Foreign currency exchange rate contracts [Member] \| Not designated as hedging instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount	3,653,000,000		3,653,000,000		4,713,000,000
Foreign currency exchange rate contracts [Member] \| Designated as hedging instrument [Member] \| Cash flow hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount	$ 6,433,000,000		6,433,000,000		5,069,000,000
Maximum remaining maturity of foreign currency derivatives	3 years
Interest rate swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized gains (losses) on outstanding forward starting interest rate swap derivative instruments	$ (27,000,000)		(27,000,000)		(71,000,000)
Interest rate swaps [Member] \| Cash flow hedging [Member] \| Interest expense, net [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Effective portion of net gains (losses) on derivative instruments reclassified from accumulated other comprehensive loss	(3,000,000)	$ (2,000,000)	(6,000,000)	$ (4,000,000)
Interest rate swaps [Member] \| Designated as hedging instrument [Member] \| Cash flow hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount	300,000,000		$ 300,000,000
Notional amount of derivatives terminated	500,000,000
Payment for derivatives terminated	$ 45,000,000
Weighted average fixed rate of interest rate derivatives	3.10%		3.10%
Interest rate swaps [Member] \| Designated as hedging instrument [Member] \| Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount	$ 1,425,000,000		$ 1,425,000,000		$ 2,025,000,000
Market value of outstanding interest rate swap agreements - net unrealized gain	47,000,000		47,000,000
Market value of hedged item - net unrealized loss	$ 47,000,000		$ 47,000,000