Income Taxes , Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Apr. 26, 2019	Apr. 27, 2018	Apr. 28, 2017	Apr. 29, 2016
Operating Loss Carryforwards [Line Items]
Cumulative income tax charge associated with the Tax Act	$ 2,400
Tax Cuts and Jobs Act of 2017, total transition tax charge	2,400
Tax Cuts and Jobs Act of 2017, charge resulting from removal of permanent reinvestment assertion	118
Tax Cuts and Jobs Act of 2017, remeasure of deferred tax assets and liabilities, provisional tax benefit	(75)
Undistributed earnings from non-U.S. subsidiaries	64,100	$ 61,000
Tax credit carryforward	178
Tax credit carryforward, no expiration	66
Valuation allowance	6,300	7,166
Income tax settlements and adjustments	(40)	1,900	$ 202
Tax Cuts and Jobs Act of 2017, measurement period adjustment, net benefit	30
Tax Cuts and Jobs Act of 2017, charge related to recognition of prepaid tax expense	42
Benefit related to intercompany legal entity restructuring	32
Tax charge (benefit) related to tax effect from divestiture	(20)		125
Net charge associated with U.S. tax reform		2,400
Charge associated with internal reorganization of certain foreign subsidiaries		73
Tax benefit from intercompany sale of intellectual property		579
Charge associated with IRS resolution			404
Charge associated with disallowance of net operating losses			86
Charge recognized for redemption of intercompany minority interest			18
Benefit recognized from resolution of intercompany debt issues			431
Tax reductions from tax holiday	437	446	475
Gross unrecognized tax benefits	1,836	1,727	1,896	$ 2,703
Unrecognized tax benefits that would impact effective tax rate	1,800	1,700	1,800
Gross unrecognized tax benefits, net of cash advance, noncurrent liability	977
Accrued income tax penalties and interest	172	128	360
Interest expense (income)	48	84	$ (208)
Internal Revenue Service (IRS) | 2005 through 2014
Operating Loss Carryforwards [Line Items]
Advance payment in connection with certain tax matters		1,100
Tax resolutions		859
Interest		$ 285
Non-U.S. Tax Authorities
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	26,200
Net operating loss carryforwards, no expiration	22,900
Net operating loss carryforwards, expiring in future years	3,300
Net operating loss carryforwards, valuation allowance	$ 8,100
Impact on diluted earnings per share (in dollars per share)	$ 0.32	$ 0.33	$ 0.34
Non-U.S. Tax Authorities | Subsidiaries
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 18,100
U.S. Tax Authority
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	682
State and Local Tax Authorities
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 1,300