Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 28, 2017	Apr. 29, 2016	Apr. 24, 2015
Income (Loss) from Continuing Operations before Income Taxes, by Jurisdiction
U.S.	$ (234)	$ 333	$ 639
International	4,836	4,003	2,847
Income before provision for income taxes	4,602	4,336	3,486
Current tax expense:
U.S.	614	440	1,128
International	840	835	502
Total current tax expense	1,454	1,275	1,630
Deferred tax (benefit) expense:
U.S.	(399)	(67)	(705)
International	(477)	(410)	(114)
Net deferred tax benefit	(876)	(477)	(819)
Total provision for income taxes	578	798	$ 811
Deferred tax assets:
Net operating loss, capital loss, and credit carryforwards	6,800	7,568
Other accrued liabilities	658	619
Accrued compensation	427	358
Pension and post-retirement benefits	456	530
Stock-based compensation	278	316
Other	308	341
Inventory	277	225
Federal and state benefit on uncertain tax positions	191	308
Unrealized loss on available-for-sale securities and derivative financial instruments	0	107
Gross deferred tax assets	9,395	10,372
Valuation allowance	(6,311)	(7,032)
Total deferred tax assets	3,084	3,340
Deferred tax liabilities:
Intangible assets	(4,943)	(5,173)
Basis impairment	0	(230)
Realized loss on derivative financial instruments	(112)	(112)
Other	(74)	(179)
Accumulated depreciation	(149)	(189)
Unrealized gain on available-for-sale securities and derivative financial instruments	(18)	0
Outside basis difference of subsidiaries	(112)	0
Total deferred tax liabilities	(5,408)	(5,883)
Prepaid income taxes	475	365
Income tax receivables	218	529
Tax liabilities, net	(1,631)	(1,649)
Reported as (after valuation allowance and jurisdictional netting):
Prepaid expenses and other current assets	545	697
Tax assets	1,509	1,383
Deferred tax liabilities	(2,978)	(3,729)
Noncurrent liabilities held for sale	$ (707)	$ 0
Effective Income Tax Rate Reconciliation
U.S. federal statutory tax rate	35.00%	35.00%	35.00%
Increase (decrease) in tax rate resulting from:
U.S. state taxes, net of federal tax benefit	1.00%	0.90%	0.80%
Research and development credit	(0.90%)	(1.20%)	(0.70%)
Domestic production activities	(0.40%)	(0.30%)	(0.40%)
International	(27.10%)	(23.40%)	(24.30%)
Puerto Rico Excise Tax	(1.50%)	(1.60%)	(1.70%)
Impact of adjustments	5.70%	11.40%	13.30%
Valuation allowance release	(1.00%)	(0.90%)	0.00%
Other, net	1.80%	(1.50%)	1.30%
Effective tax rate	12.60%	18.40%	23.30%
Unrecognized Tax Benefits Reconciliation
Gross unrecognized tax benefits at beginning of fiscal year	$ 2,703	$ 2,860	$ 1,172
Gross increases:
Prior year tax positions	147	36	331
Current year tax positions	75	202	231
Acquisitions	4	0	1,199
Acquisitions
Prior year tax positions	(538)	(116)	(40)
Settlements	(467)	(275)	(33)
Statute of limitation lapses	(28)	(4)	0
Gross unrecognized tax benefits at end of fiscal year	1,896	2,703	2,860
Cash advance paid in connection with proposed settlements	0	(384)	(378)
Gross unrecognized tax benefits at end of fiscal year, net of cash advance	$ 1,896	$ 2,319	$ 2,482