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Fair Value Measurements - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Millions | Oct. 02, 2016 | Jan. 03, 2016 | Sep. 27, 2015 | Dec. 28, 2014
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Available-for-sale Securities [Abstract] |  |  |  |  |  |
Available-for-sale Securities - Estimated Fair Value | [1] | $ 12,237 | $ 8,316 | [2] |  |
Available-for-sale Securities and Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Cash and Cash Equivalents |  | 18,205 | 13,732 |  | $ 13,639 | $ 14,523
Marketable securities |  | 22,228 | $ 24,644 |  |  |
Held-to-maturity Securities |  |  |  |  |  |
Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Held-to-maturity Securities - Carrying Amount |  | 27,851 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain |  | 2 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss |  | 0 |  |  |  |
Held-to-maturity Securities - Estimated Fair Value |  | 27,853 |  |  |  |
Available-for-sale Securities and Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Cash and Cash Equivalents |  | 18,205 |  |  |  |
Marketable securities |  | 9,646 |  |  |  |
Held-to-maturity Securities | Cash |  |  |  |  |  |
Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Held-to-maturity Securities - Carrying Amount |  | 1,971 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain |  | 0 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss |  | 0 |  |  |  |
Held-to-maturity Securities - Estimated Fair Value |  | 1,971 |  |  |  |
Available-for-sale Securities and Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Cash and Cash Equivalents |  | 1,971 |  |  |  |
Held-to-maturity Securities | U.S. Gov't Securities(1) |  |  |  |  |  |
Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Held-to-maturity Securities - Carrying Amount | [3] | 10,498 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain |  | 1 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss |  | 0 |  |  |  |
Held-to-maturity Securities - Estimated Fair Value | [3] | 10,499 |  |  |  |
Available-for-sale Securities and Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Cash and Cash Equivalents | [3] | 6,997 |  |  |  |
Marketable securities | [3] | 3,501 |  |  |  |
Held-to-maturity Securities | Other Sovereign Securities(1) |  |  |  |  |  |
Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Held-to-maturity Securities - Carrying Amount | [3] | 3,385 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain |  | 0 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss |  | 0 |  |  |  |
Held-to-maturity Securities - Estimated Fair Value | [3] | 3,385 |  |  |  |
Available-for-sale Securities and Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Cash and Cash Equivalents | [3] | 952 |  |  |  |
Marketable securities | [3] | 2,433 |  |  |  |
Held-to-maturity Securities | U.S. Reverse repurchase agreements(1) |  |  |  |  |  |
Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Held-to-maturity Securities - Carrying Amount | [3] | 5,883 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain |  | 0 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss |  | 0 |  |  |  |
Held-to-maturity Securities - Estimated Fair Value | [3] | 5,883 |  |  |  |
Available-for-sale Securities and Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Cash and Cash Equivalents | [3] | 4,882 |  |  |  |
Marketable securities | [3] | 1,001 |  |  |  |
Held-to-maturity Securities | Other Reverse repurchase agreements(1) |  |  |  |  |  |
Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Held-to-maturity Securities - Carrying Amount | [3] | 96 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain |  | 0 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss |  | 0 |  |  |  |
Held-to-maturity Securities - Estimated Fair Value | [3] | 96 |  |  |  |
Available-for-sale Securities and Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Cash and Cash Equivalents | [3] | 96 |  |  |  |
Held-to-maturity Securities | Corporate debt securities(1) |  |  |  |  |  |
Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Held-to-maturity Securities - Carrying Amount | [3] | 3,501 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain |  | 1 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss |  | 0 |  |  |  |
Held-to-maturity Securities - Estimated Fair Value | [3] | 3,502 |  |  |  |
Available-for-sale Securities and Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Cash and Cash Equivalents | [3] | 790 |  |  |  |
Marketable securities | [3] | 2,711 |  |  |  |
Held-to-maturity Securities | Money market funds |  |  |  |  |  |
Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Held-to-maturity Securities - Carrying Amount |  | 1,448 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain |  | 0 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss |  | 0 |  |  |  |
Held-to-maturity Securities - Estimated Fair Value |  | 1,448 |  |  |  |
Available-for-sale Securities and Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Cash and Cash Equivalents |  | 1,448 |  |  |  |
Held-to-maturity Securities | Time deposits(1) |  |  |  |  |  |
Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Held-to-maturity Securities - Carrying Amount | [3] | 1,069 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain |  | 0 |  |  |  |
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss |  | 0 |  |  |  |
Held-to-maturity Securities - Estimated Fair Value | [3] | 1,069 |  |  |  |
Available-for-sale Securities and Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Cash and Cash Equivalents | [3] | 1,069 |  |  |  |
Available-for-sale Securities |  |  |  |  |  |
Available-for-sale Securities [Abstract] |  |  |  |  |  |
Available-for-sale Securities - Carrying Amount | [4] | 12,158 |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax | [4] | 445 |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax | [4] | (21) |  |  |  |
Available-for-sale Securities - Estimated Fair Value | [4] | 12,582 |  |  |  |
Available-for-sale Securities and Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Cash and Cash Equivalents | [4] | 0 |  |  |  |
Marketable securities | [4] | 12,582 |  |  |  |
Available-for-sale Securities | U.S. Gov't Securities(1) |  |  |  |  |  |
Available-for-sale Securities [Abstract] |  |  |  |  |  |
Available-for-sale Securities - Carrying Amount | [4] | 10,235 |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax | [4] | 120 |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax | [4] | (1) |  |  |  |
Available-for-sale Securities - Estimated Fair Value | [4] | 10,354 |  |  |  |
Available-for-sale Securities and Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Cash and Cash Equivalents |  | 0 |  |  |  |
Marketable securities | [4] | 10,354 |  |  |  |
Available-for-sale Securities | Other Sovereign Securities(1) |  |  |  |  |  |
Available-for-sale Securities [Abstract] |  |  |  |  |  |
Available-for-sale Securities - Carrying Amount | [4] | 91 |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax | [4] | 0 |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax | [4] | 0 |  |  |  |
Available-for-sale Securities - Estimated Fair Value | [4] | 91 |  |  |  |
Available-for-sale Securities and Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Cash and Cash Equivalents |  | 0 |  |  |  |
Marketable securities | [4] | 91 |  |  |  |
Available-for-sale Securities | Corporate debt securities(1) |  |  |  |  |  |
Available-for-sale Securities [Abstract] |  |  |  |  |  |
Available-for-sale Securities - Carrying Amount | [4] | 1,782 |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax | [4] | 11 |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax | [4] | (1) |  |  |  |
Available-for-sale Securities - Estimated Fair Value | [4] | 1,792 |  |  |  |
Available-for-sale Securities and Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Cash and Cash Equivalents |  | 0 |  |  |  |
Marketable securities | [4] | 1,792 |  |  |  |
Available-for-sale Securities | Equity investments |  |  |  |  |  |
Available-for-sale Securities [Abstract] |  |  |  |  |  |
Available-for-sale Securities - Carrying Amount | [4] | 50 |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax | [4] | 314 |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax | [4] | (19) |  |  |  |
Available-for-sale Securities - Estimated Fair Value | [4] | 345 |  |  |  |
Available-for-sale Securities and Held-to-maturity Securities [Abstract] |  |  |  |  |  |
Cash and Cash Equivalents |  | 0 |  |  |  |
Marketable securities | [4] | $ 345 |  |  |  |
[1] | Classified as current marketable securities
[2] | 2015 assets and liabilities are all classified as Level 2 with the exception of equity investments of $1,494 million, which are classified as Level 1.
[3] | Held to maturity investments are reported at amortized cost and gains or losses are reported in earnings
[4] | Available for sale securities are reported at fair value with unrealized gains and losses reported net of taxes in other comprehensive income.

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