Income Taxes - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Apr. 24, 2020	Apr. 26, 2019	Apr. 27, 2018	Apr. 28, 2017
Operating Loss Carryforwards [Line Items]
Undistributed earnings from non-U.S. subsidiaries	$ 69,900	$ 64,100
Tax credit carryforward	200
Tax credit carryforward, no expiration	96
Valuation allowance	5,482	6,300
Income tax settlements and adjustments	(1,200)	(40)	$ 1,900
Net benefit associated with finalization of certain impacts from U.S. Tax Reform	63	30
Benefit related to tax legislative changes in Switzerland	252
Benefit related to release of valuation allowance	658
Tax benefit from intercompany sale of intellectual property	269		579
Charge related to recognition of prepaid tax expense		42
Benefit related to intercompany legal entity restructuring		32
Tax benefit related to tax effect from divestiture		20
Net charge associated with U.S. tax reform			2,400
Charge associated with internal reorganization of certain foreign subsidiaries			73
Tax reductions from tax holiday	231	437	446
Gross unrecognized tax benefits	1,862	1,836	1,727	$ 1,896
Unrecognized tax benefits that would impact effective tax rate	1,800	1,800	1,700
Gross unrecognized tax benefits, net of cash advance, noncurrent liability	911
Estimated reasonably possible decrease in uncertain tax positions excluding interest over the next 12 months	115
Accrued income tax penalties and interest	225	172	128
Gross interest expense	$ 53	$ 48	84
Amortizable Asset Created for Swiss Federal Income Tax Purposes
Operating Loss Carryforwards [Line Items]
Period over which amortization asset will be amortized and deducted	10 years
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	$ 25,100
Net operating loss carryforwards, no expiration	22,100
Net operating loss carryforwards, expiring in future years	3,000
Net operating loss carryforwards, valuation allowance	$ 7,600
Impact on diluted earnings per share (in dollars per share)	$ 0.17	$ 0.32	$ 0.33
Non-U.S. Tax Authorities | Subsidiaries
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 17,500
U.S. Tax Authority
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	524
Net operating loss carryforwards, no expiration	102
State and Local Tax Authorities
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards, expiring in future years	$ 1,400