Derivatives and Currency Exchange Risk Management - Amount of (Gains) Losses Recognized in Consolidated Statements of Income, Cash Flow Hedges (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jan. 24, 2020	Jan. 25, 2019	Jan. 24, 2020	Jan. 25, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Other operating (income) expense, net	$ (39)	$ 57	$ 88	$ 278
Cash flow hedging \| Currency exchange rate contracts \| Other operating (income) expense, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of (gain) loss reclassified from AOCI into income	$ (82)		$ (206)
Amount of (gain) loss reclassified from AOCI into income		$ (48)		$ (56)

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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.

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