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Fair Value Measurements - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Millions | Oct. 03, 2021 | Jan. 03, 2021
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Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities - Estimated Fair Value | $ 18,911 | $ 14,042
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 17,604 | 13,985
Marketable securities | 13,397 | $ 11,200
Total cash, cash equivalents and current marketable securities, Carrying Amount | 31,001 |
Total cash, cash equivalents and current marketable securities, Unrecognized Gain | 0 |
Total cash, cash equivalents and current marketable securities, Unrecognized Loss | 0 |
Total cash, cash equivalents and current marketable securities, Estimated Fair Value | 31,001 |
Held-to-maturity Securities |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 12,090 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities, Unrecognized Loss | 0 |
Held-to-maturity Securities - Estimated Fair Value | 12,090 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 7,890 |
Marketable securities | 4,200 |
Held-to-maturity Securities | Cash |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 2,607 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities, Unrecognized Loss | 0 |
Held-to-maturity Securities - Estimated Fair Value | 2,607 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 2,607 |
Marketable securities | 0 |
Held-to-maturity Securities | Non-U.S. sovereign securities(1) |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 870 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities, Unrecognized Loss | 0 |
Held-to-maturity Securities - Estimated Fair Value | 870 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 0 |
Marketable securities | 870 |
Held-to-maturity Securities | U.S. reverse repurchase agreements |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 1,715 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities, Unrecognized Loss | 0 |
Held-to-maturity Securities - Estimated Fair Value | 1,715 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 1,715 |
Marketable securities | 0 |
Held-to-maturity Securities | Corporate debt securities(1) |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 3,604 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities, Unrecognized Loss | 0 |
Held-to-maturity Securities - Estimated Fair Value | 3,604 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 274 |
Marketable securities | 3,330 |
Held-to-maturity Securities | Money market funds |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 2,120 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities, Unrecognized Loss | 0 |
Held-to-maturity Securities - Estimated Fair Value | 2,120 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 2,120 |
Marketable securities | 0 |
Held-to-maturity Securities | Time deposits(1) |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 1,174 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities, Unrecognized Loss | 0 |
Held-to-maturity Securities - Estimated Fair Value | 1,174 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 1,174 |
Marketable securities | 0 |
Available-for-sale Securities |  |
Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities - Carrying Amount | 18,911 |
Available-for-sale Securities, Unrecognized Gain | 0 |
Available-for-sale Securities, Unrecognized Loss | 0 |
Available-for-sale Securities - Estimated Fair Value | 18,911 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 9,714 |
Marketable securities | 9,197 |
Available-for-sale Securities | Non-U.S. sovereign securities(1) |  |
Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities - Carrying Amount | 3 |
Available-for-sale Securities, Unrecognized Gain | 0 |
Available-for-sale Securities, Unrecognized Loss | 0 |
Available-for-sale Securities - Estimated Fair Value | 3 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 2 |
Marketable securities | 1 |
Available-for-sale Securities | Corporate debt securities(1) |  |
Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities - Carrying Amount | 251 |
Available-for-sale Securities, Unrecognized Gain | 0 |
Available-for-sale Securities, Unrecognized Loss | 0 |
Available-for-sale Securities - Estimated Fair Value | 251 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 15 |
Marketable securities | 236 |
Available-for-sale Securities | U.S. Gov't securities |  |
Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities - Carrying Amount | 18,657 |
Available-for-sale Securities, Unrecognized Gain | 0 |
Available-for-sale Securities, Unrecognized Loss | 0 |
Available-for-sale Securities - Estimated Fair Value | 18,657 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 9,697 |
Marketable securities | $ 8,960 |

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