Income Taxes (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 01, 2018	Jan. 28, 2018		Jan. 29, 2017	Jan. 31, 2016
Current Income Tax Expense
Federal		$ 464		$ 7	$ (43)
State		1		1	1
Foreign		43		34	25
Total current		508		42	(17)
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal		(376)		199	134
State		0		0	0
Foreign		17		(2)	0
Total deferred		(359)		197	134
Charge in lieu of taxes attributable to employer stock option plans		0		0	12
Income tax expense		149		239	129
Income before Income Taxes
Domestic		1,600	[1]	600	129
Foreign		1,596		1,305	614
Income before income tax expense		$ 3,196		$ 1,905	$ 743
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Effective tax rate		4.70%		12.50%	17.30%
U.S. federal statutory income tax rate, percent	21.00%	33.90%		35.00%	35.00%
Tax expense computed at federal statutory rate		$ 1,084		$ 667	$ 260
State income taxes, net of federal tax effect		10		4	1
Foreign tax rate differential		(545)		(315)	(95)
Stock-based compensation		(181)	[2]	(70)	13
Tax Cuts and Jobs Act of 2017, Income Tax Expense (Benefit)		133	[3]	0	0
Tax Cuts and Jobs Act of 2017, Transition Tax for Accumulated Foreign Earnings, Income Tax Expense		971
U.S. federal R&D tax credit		(87)		(52)	(38)
Tax expense related to inter-company transaction		0		10	10
Restructuring and expiration of statute of limitations		0		0	(21)
Other		1		(5)	(1)
Income tax expense		149		239	$ 129
Excess Tax Benefit Related To Stock Based Compensation		197		82
Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Deferred Tax Liability, Income Tax Benefit		1,150
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017, Amount		176
Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Income Tax Expense (Benefit)		43
Components of Deferred Tax Assets [Abstract]
Net operating loss carryforwards		67		199
Accruals and reserves, not currently deductible for tax purposes		24		40
Property, equipment and intangible assets		32		50
Research and other tax credit carryforwards		579		728
Stock-based compensation		24		34
Convertible debt		0		6
Gross deferred tax assets		726		1,057
Less valuation allowance		(469)		(353)
Deferred Tax Assets, Net		257		704
Components of Deferred Tax Liabilities [Abstract]
Acquired intangibles		(4)		(11)
Unremitted earnings of foreign subsidiaries		(26)		(827)
Deferred Tax Liabilities, Gross		(30)		(838)
Net deferred tax asset (liability)		(227)		$ (134)
Operating Loss Carryforwards [Line Items]
Unrecognized tax benefit related to state tax positions		58
UNITED STATES
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards		74
Deferred Tax Assets, Tax Credit Carryforwards, Research		361
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards		226
Deferred Tax Assets, Tax Credit Carryforwards, Research		575
CALIFORNIA
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards, Research		554
Other states
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards, Research		21
Foreign Country
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards		$ 281

[1] The increase in domestic income is primarily due to jurisdictional allocation of stock-based compensation charges.

[2] We adopted an accounting standard related to stock-based compensation effective February 1, 2016, which required the excess tax benefit to be reflected in our provision for income taxes rather than in additional paid-in-capital. The total related excess tax benefit recognized for fiscal year 2018 and 2017 was $197 million and $82 million, respectively.

[3] We recognized a provisional tax benefit of $133 million, which was included as a component of income tax expense.