Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Jul. 31, 2020	Jul. 26, 2019	Apr. 24, 2020
Income Tax Disclosure [Abstract]
Effective tax rate	15.90%	10.20%
Certain tax adjustments	$ 4	$ (30)
Benefit associated with finalization of intercompany sale of intellectual property and establishment of deferred tax asset	3
Recognition of previously deferred tax benefit from intercompany intellectual property transactions	$ 1,500
Deferred tax asset amortization period	20 years
Cost associated with amortization of previously established deferred tax assets from intercompany intellectual property transactions	$ 7
Net benefit related to measurement period adjustment related to U.S. Tax Reform		$ 30
Gross unrecognized tax benefits	1,900		$ 1,900
Accrued gross interest and penalties	241
Unrecognized tax benefits that would impact effective tax rate	1,800
Gross unrecognized tax benefits recorded as noncurrent liability	$ 934		$ 911