Cash, Cash Equivalents and Current Marketable Securities - Cash and Cash Equivalent Composition (Details) - USD ($) $ in Millions	Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014	Dec. 29, 2013
Cash, Cash Equivalents, and Short-term Investments [Abstract]
Cash Equivalents	$ 18,972	$ 13,732	$ 14,523	$ 20,927
Current Marketable Securities	22,935	24,644
Held-to-maturity Securities
Cash, Cash Equivalents, and Short-term Investments [Abstract]
Carrying Amount	29,488	30,060
Unrecognized Gain	0	1
Unrecognized Loss	(1)	(2)
Estimated Fair Value	29,487	30,059
Cash Equivalents	18,972	13,732
Current Marketable Securities	10,516	16,328
Held-to-maturity Securities | Cash
Cash, Cash Equivalents, and Short-term Investments [Abstract]
Carrying Amount	1,979	1,832
Unrecognized Gain	0	0
Unrecognized Loss	0	0
Estimated Fair Value	1,979	1,832
Cash Equivalents	1,979	1,832
Current Marketable Securities	0	0
Held-to-maturity Securities | U.S. Gov't Securities(1)
Cash, Cash Equivalents, and Short-term Investments [Abstract]
Carrying Amount	10,832	14,641
Unrecognized Gain	0	1
Unrecognized Loss	(1)	(2)
Estimated Fair Value	10,831	14,640
Cash Equivalents	2,249	650
Current Marketable Securities	8,583	13,991
Held-to-maturity Securities | Other Sovereign Securities(1)
Cash, Cash Equivalents, and Short-term Investments [Abstract]
Carrying Amount	1,299	2,122
Unrecognized Gain	0	0
Unrecognized Loss	0	0
Estimated Fair Value	1,299	2,122
Cash Equivalents	120	933
Current Marketable Securities	1,179	1,189
Held-to-maturity Securities | U.S. Reverse repurchase agreements
Cash, Cash Equivalents, and Short-term Investments [Abstract]
Carrying Amount	6,103	1,579
Unrecognized Gain	0	0
Unrecognized Loss	0	0
Estimated Fair Value	6,103	1,579
Cash Equivalents	6,103	1,579
Current Marketable Securities	0	0
Held-to-maturity Securities | Other Reverse repurchase agreements
Cash, Cash Equivalents, and Short-term Investments [Abstract]
Carrying Amount	240	2,200
Unrecognized Gain	0	0
Unrecognized Loss	0	0
Estimated Fair Value	240	2,200
Cash Equivalents	240	2,200
Current Marketable Securities	0	0
Held-to-maturity Securities | Corporate debt securities(1)
Cash, Cash Equivalents, and Short-term Investments [Abstract]
Carrying Amount	754	2,941
Unrecognized Gain	0	0
Unrecognized Loss	0	0
Estimated Fair Value	754	2,941
Cash Equivalents	0	1,793
Current Marketable Securities	754	1,148
Held-to-maturity Securities | Money market funds
Cash, Cash Equivalents, and Short-term Investments [Abstract]
Carrying Amount	7,187	3,855
Unrecognized Gain	0	0
Unrecognized Loss	0	0
Estimated Fair Value	7,187	3,855
Cash Equivalents	7,187	3,855
Current Marketable Securities	0	0
Held-to-maturity Securities | Time deposits(1)
Cash, Cash Equivalents, and Short-term Investments [Abstract]
Carrying Amount	1,094	890
Unrecognized Gain	0	0
Unrecognized Loss	0	0
Estimated Fair Value	1,094	890
Cash Equivalents	1,094	890
Current Marketable Securities	0	0
Available-for-sale Securities
Cash, Cash Equivalents, and Short-term Investments [Abstract]
Cash Equivalents	0	0
Current Marketable Securities	12,419	8,316
Available-for-sale Securities, Amortized Cost Basis	12,178	8,353
Unrealized Gain	304	2
Unrealized Loss	(63)	(39)
Available-for-sale Securities	12,419	8,316
Available-for-sale Securities | U.S. Gov't Securities(1)
Cash, Cash Equivalents, and Short-term Investments [Abstract]
Cash Equivalents	0	0
Current Marketable Securities	10,231	7,274
Available-for-sale Securities, Amortized Cost Basis	10,277	7,307
Unrealized Gain	5	1
Unrealized Loss	(51)	(34)
Available-for-sale Securities	10,231	7,274
Available-for-sale Securities | Other Sovereign Securities(1)
Cash, Cash Equivalents, and Short-term Investments [Abstract]
Current Marketable Securities	90	0
Available-for-sale Securities, Amortized Cost Basis	90	0
Unrealized Gain	0	0
Unrealized Loss	0	0
Available-for-sale Securities	90	0
Available-for-sale Securities | Corporate debt securities(1)
Cash, Cash Equivalents, and Short-term Investments [Abstract]
Cash Equivalents	0	0
Current Marketable Securities	1,766	1,042
Available-for-sale Securities, Amortized Cost Basis	1,777	1,046
Unrealized Gain	1	1
Unrealized Loss	(12)	(5)
Available-for-sale Securities	1,766	$ 1,042
Available-for-sale Securities | Equity investments
Cash, Cash Equivalents, and Short-term Investments [Abstract]
Current Marketable Securities	332
Available-for-sale Securities, Amortized Cost Basis	34
Unrealized Gain	298
Unrealized Loss
Available-for-sale Securities	$ 332