Property, Plant, and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 26, 2019	Apr. 27, 2018	Apr. 28, 2017
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 10,920	$ 10,259
Less: Accumulated depreciation	(6,245)	(5,655)
Property, plant, and equipment, net	4,675	4,604
Depreciation expense	895	821	$ 937
Equipment
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 5,519	5,171
Property, plant, and equipment, useful life	15 years
Equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, useful life	2 years
Equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, useful life	7 years
Computer software
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 1,842	1,578
Computer software | Maximum
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, useful life	5 years
Land and land improvements
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 181	187
Land and land improvements | Maximum
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, useful life	20 years
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 2,267	2,265
Buildings and leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, useful life	40 years
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 1,111	$ 1,058