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Cash, Cash Equivalents and Current Marketable Securities - Cash and Cash Equivalent Composition (Details) - USD ($) $ in Millions | Jan. 03, 2021 | Dec. 29, 2019
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Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |
Cash & Cash Equivalents | $ 13,985 | $ 17,305
Debt Securities, Held-to-maturity, Fair Value | 2,863 |
Current Marketable Securities | 11,200 | 1,982
Held-to-maturity Securities |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |
Carrying Amount, held-to-maturity | 11,143 | 14,919
Cash & Cash Equivalents | 9,230 | 14,195
Debt Securities, Held-to-maturity, Fair Value | 11,143 |
Current Marketable Securities | 1,913 | 724
Held-to-maturity Securities | Cash |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |
Carrying Amount, held-to-maturity | 2,863 | 2,637
Cash & Cash Equivalents | 2,863 | 2,637
Current Marketable Securities | 0 | 0
Held-to-maturity Securities | Non-U.S. Sovereign Securities(1) |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |
Carrying Amount, held-to-maturity | 690 | 439
Cash & Cash Equivalents | 0 | 149
Debt Securities, Held-to-maturity, Fair Value | 690 |
Current Marketable Securities | 690 | 290
Held-to-maturity Securities | U.S. Reverse repurchase agreements |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |
Carrying Amount, held-to-maturity | 1,937 | 6,375
Cash & Cash Equivalents | 1,937 | 6,375
Debt Securities, Held-to-maturity, Fair Value | 1,937 |
Current Marketable Securities | 0 | 0
Held-to-maturity Securities | Other Reverse repurchase agreements |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |
Carrying Amount, held-to-maturity |  | 375
Cash & Cash Equivalents |  | 375
Current Marketable Securities |  | 0
Held-to-maturity Securities | Corporate debt securities(1) |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |
Carrying Amount, held-to-maturity | 2,674 | 1,323
Cash & Cash Equivalents | 1,451 | 889
Debt Securities, Held-to-maturity, Fair Value | 2,674 |
Current Marketable Securities | 1,223 | 434
Held-to-maturity Securities | Money market funds |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |
Carrying Amount, held-to-maturity | 2,102 | 2,864
Cash & Cash Equivalents | 2,102 | 2,864
Debt Securities, Held-to-maturity, Fair Value | 2,102 |
Current Marketable Securities | 0 | 0
Held-to-maturity Securities | Time deposits(1) |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |
Carrying Amount, held-to-maturity | 877 | 906
Cash & Cash Equivalents | 877 | 906
Debt Securities, Held-to-maturity, Fair Value | 877 |
Current Marketable Securities | 0 | 0
Available-for-sale Securities |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |
Carrying Amount, available-for-sale | 14,041 | 4,368
Cash & Cash Equivalents | 4,755 | 3,110
Debt Securities, Held-to-maturity, Fair Value | 14,042 |
Current Marketable Securities | 9,287 | 1,258
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 1 |
Available-for-sale Securities | U.S. Gov't Securities |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |
Carrying Amount, available-for-sale | 13,777 | 4,102
Cash & Cash Equivalents | 4,731 | 3,095
Debt Securities, Held-to-maturity, Fair Value | 13,778 |
Current Marketable Securities | 9,047 | 1,007
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 1 |
Available-for-sale Securities | Corporate debt securities(1) |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |
Carrying Amount, available-for-sale | 250 | 266
Cash & Cash Equivalents | 24 | 15
Debt Securities, Held-to-maturity, Fair Value | 250 |
Current Marketable Securities | 226 | $ 251
Available-for-sale Securities | Other Sovereign Securities |  |
Cash, Cash Equivalents, and Short-term Investments [Abstract] |  |
Carrying Amount, available-for-sale | 14 |
Cash & Cash Equivalents | 0 |
Debt Securities, Held-to-maturity, Fair Value | 14 |
Current Marketable Securities | $ 14 |

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