Derivatives and Currency Exchange Risk Management - Amount of (Gains) Losses Recognized in Consolidated Statements of Income, Cash Flow Hedges (Details) - USD ($) $ in Millions	12 Months Ended
Apr. 24, 2020	Apr. 26, 2019	Apr. 27, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Other operating expense, net	$ 71	$ 258	$ 535
Cash flow hedges \| Currency exchange rate contracts \| Other operating expense, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of (gain) loss reclassified from AOCI into income	$ (335)
Amount of (gain) loss reclassified from AOCI into income		$ (108)	$ 69

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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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Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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