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Cash, Cash Equivalents and Current Marketable Securities - Cash and Cash Equivalent Composition (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Jan. 01, 2017 | Jan. 03, 2016 | Dec. 28, 2014
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Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |  |  |
Cash Equivalents | $ 17,824 | $ 18,972 | $ 13,732 | $ 14,523
Current Marketable Securities | 472 | 22,935 |  |
Held-to-maturity Securities |  |  |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |  |  |
Carrying Amount | 12,986 | 29,488 |  |
Unrecognized Gain |  | 0 |  |
Unrecognized Loss |  | (1) |  |
Estimated Fair Value | 12,986 | 29,487 |  |
Cash Equivalents | 12,880 | 18,972 |  |
Current Marketable Securities | 106 | 10,516 |  |
Held-to-maturity Securities | Cash |  |  |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |  |  |
Carrying Amount | 2,929 | 1,979 |  |
Unrecognized Gain |  | 0 |  |
Unrecognized Loss |  | 0 |  |
Estimated Fair Value | 2,929 | 1,979 |  |
Cash Equivalents | 2,929 | 1,979 |  |
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 | 0 | 10,832 |  |
Unrecognized Gain |  | 0 |  |
Unrecognized Loss |  | (1) |  |
Estimated Fair Value | 0 | 10,831 |  |
Cash Equivalents | 0 | 2,249 |  |
Current Marketable Securities | 0 | 8,583 |  |
Held-to-maturity Securities | Other Sovereign Securities(1) |  |  |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |  |  |
Carrying Amount | 279 | 1,299 |  |
Unrecognized Gain |  | 0 |  |
Unrecognized Loss |  | 0 |  |
Estimated Fair Value | 279 | 1,299 |  |
Cash Equivalents | 219 | 120 |  |
Current Marketable Securities | 60 | 1,179 |  |
Held-to-maturity Securities | U.S. Reverse repurchase agreements |  |  |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |  |  |
Carrying Amount | 4,025 | 6,103 |  |
Unrecognized Gain |  | 0 |  |
Unrecognized Loss |  | 0 |  |
Estimated Fair Value | 4,025 | 6,103 |  |
Cash Equivalents | 4,025 | 6,103 |  |
Current Marketable Securities | 0 | 0 |  |
Held-to-maturity Securities | Other Reverse repurchase agreements |  |  |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |  |  |
Carrying Amount | 0 | 240 |  |
Unrecognized Gain |  | 0 |  |
Unrecognized Loss |  | 0 |  |
Estimated Fair Value | 0 | 240 |  |
Cash Equivalents | 0 | 240 |  |
Current Marketable Securities | 0 | 0 |  |
Held-to-maturity Securities | Corporate debt securities(1) |  |  |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |  |  |
Carrying Amount | 289 | 754 |  |
Unrecognized Gain |  | 0 |  |
Unrecognized Loss |  | 0 |  |
Estimated Fair Value | 289 | 754 |  |
Cash Equivalents | 244 | 0 |  |
Current Marketable Securities | 45 | 754 |  |
Held-to-maturity Securities | Money market funds |  |  |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |  |  |
Carrying Amount | 4,288 | 7,187 |  |
Unrecognized Gain |  | 0 |  |
Unrecognized Loss |  | 0 |  |
Estimated Fair Value | 4,288 | 7,187 |  |
Cash Equivalents | 4,288 | 7,187 |  |
Current Marketable Securities | 0 | 0 |  |
Held-to-maturity Securities | Time deposits(1) |  |  |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |  |  |
Carrying Amount | 1,176 | 1,094 |  |
Unrecognized Gain |  | 0 |  |
Unrecognized Loss |  | 0 |  |
Estimated Fair Value | 1,176 | 1,094 |  |
Cash Equivalents | 1,175 | 1,094 |  |
Current Marketable Securities | 1 | 0 |  |
Available-for-sale Securities |  |  |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |  |  |
Cash Equivalents | 4,944 | 0 |  |
Current Marketable Securities | 366 | 12,419 |  |
Available-for-sale Securities, Amortized Cost Basis | 5,310 | 12,178 |  |
Unrealized Gain |  | 304 |  |
Unrealized Loss |  | (63) |  |
Available-for-sale Securities | 5,310 | 12,419 |  |
Available-for-sale Securities | U.S. Gov't Securities(1) |  |  |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |  |  |
Cash Equivalents | 4,833 | 0 |  |
Current Marketable Securities | 31 | 10,231 |  |
Available-for-sale Securities, Amortized Cost Basis | 4,864 | 10,277 |  |
Unrealized Gain |  | 5 |  |
Unrealized Loss |  | (51) |  |
Available-for-sale Securities | 4,864 | 10,231 |  |
Available-for-sale Securities | Other Sovereign Securities(1) |  |  |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |  |  |
Cash Equivalents | 80 |  |  |
Current Marketable Securities | 106 | 90 |  |
Available-for-sale Securities, Amortized Cost Basis | 186 | 90 |  |
Unrealized Gain |  | 0 |  |
Unrealized Loss |  | 0 |  |
Available-for-sale Securities | 186 | 90 |  |
Available-for-sale Securities | Corporate debt securities(1) |  |  |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |  |  |
Cash Equivalents | 31 | 0 |  |
Current Marketable Securities | 229 | 1,766 |  |
Available-for-sale Securities, Amortized Cost Basis | 260 | 1,777 |  |
Unrealized Gain |  | 1 |  |
Unrealized Loss |  | (12) |  |
Available-for-sale Securities | $ 260 | 1,766 |  |
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 |  | 0 |  |
Available-for-sale Securities |  | $ 332 |  |

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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3044-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.6) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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