Investments, Available-for-Sale Investments (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016	Dec. 31, 2016
Available-for-sale Securities [Abstract]
Fair Value	$ 15,909		$ 15,909
Adjusted Cost, Total	18,464		18,464		$ 14,344
Gross Unrealized Gains, Total	3,367		3,367		3,372
Gross Unrealized Losses, Total	(18)		(18)		(34)
Fair Value, Total	21,813		21,813		17,682
Available-for-sale Securities, sale Proceeds	1,300	$ 875	1,800	$ 3,800
Available-for-sale Securities, Gross Realized Gains	796	403	1,100	497
Due in 1 year or less, Fair Value	8,408		8,408
Due in 1-2 years, Fair Value	1,434		1,434
Due in 2-5 years, Fair Value	2,976		2,976
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	71		71
Instruments not due at a single maturity date, Fair Value	3,020		3,020
Other than Temporary Impairment Losses, Investments	555	$ 60	603	$ 89
Corporate Debt Securities [Member]
Available-for-sale Securities [Abstract]
Adjusted Cost	6,115		6,115		3,847
Gross Unrealized Gains	13		13		4
Gross Unrealized Losses	(7)		(7)		(14)
Fair Value	6,121		6,121		3,837
Financial Institution Instruments [Member]
Available-for-sale Securities [Abstract]
Adjusted Cost	8,011		8,011		6,098
Gross Unrealized Gains	7		7		5
Gross Unrealized Losses	(6)		(6)		(11)
Fair Value	8,012		8,012		6,092
Government Debt [Member]
Available-for-sale Securities [Abstract]
Adjusted Cost	1,778		1,778		1,581
Gross Unrealized Gains	3		3		0
Gross Unrealized Losses	(5)		(5)		(8)
Fair Value	1,776		1,776		1,573
Marketable Equity Securities [Member]
Available-for-sale Securities [Abstract]
Adjusted Cost	2,560		2,560		2,818
Gross Unrealized Gains	3,344		3,344		3,363
Gross Unrealized Losses	0		0		(1)
Fair Value	$ 5,904		5,904		$ 6,180
Cloudera, Inc [Member]
Available-for-sale Securities [Abstract]
Other than Temporary Impairment Losses, Investments			$ 278