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Fair Value Measurements - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Millions | Apr. 04, 2021 | Jan. 03, 2021
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Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities - Estimated Fair Value | $ 14,493 | $ 14,042
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 12,671 | 13,985
Marketable securities | 11,948 | $ 11,200
Total cash, cash equivalents and current marketable securities, Carrying Amount | 24,618 |
Total cash, cash equivalents and current marketable securities, Unrecognized Gain | 1 |
Total cash, cash equivalents and current marketable securities, Unrecognized Loss | 0 |
Total cash, cash equivalents and current marketable securities, Estimated Fair Value | 24,619 |
Held-to-maturity Securities |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 10,126 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities, Unrecognized Loss | 0 |
Held-to-maturity Securities - Estimated Fair Value | 10,126 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 8,377 |
Marketable securities | 1,749 |
Held-to-maturity Securities | Cash |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 2,247 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities, Unrecognized Loss | 0 |
Held-to-maturity Securities - Estimated Fair Value | 2,247 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 2,247 |
Held-to-maturity Securities | Non-U.S. sovereign securities(1) |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 400 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities, Unrecognized Loss | 0 |
Held-to-maturity Securities - Estimated Fair Value | 400 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 0 |
Marketable securities | 400 |
Held-to-maturity Securities | U.S. reverse repurchase agreements |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 1,199 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities, Unrecognized Loss | 0 |
Held-to-maturity Securities - Estimated Fair Value | 1,199 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 1,199 |
Marketable securities | 0 |
Held-to-maturity Securities | Other reverse repurchase agreements |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 0 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities, Unrecognized Loss | 0 |
Held-to-maturity Securities - Estimated Fair Value | 0 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 0 |
Held-to-maturity Securities | Corporate debt securities(1) |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 3,239 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities, Unrecognized Loss | 0 |
Held-to-maturity Securities - Estimated Fair Value | 3,239 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 1,890 |
Marketable securities | 1,349 |
Held-to-maturity Securities | Money market funds |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 2,094 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities, Unrecognized Loss | 0 |
Held-to-maturity Securities - Estimated Fair Value | 2,094 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 2,094 |
Held-to-maturity Securities | Time deposits(1) |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 947 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities, Unrecognized Loss | 0 |
Held-to-maturity Securities - Estimated Fair Value | 947 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 947 |
Available-for-sale Securities |  |
Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities - Carrying Amount | 14,492 |
Available-for-sale Securities, Unrecognized Gain | 1 |
Available-for-sale Securities, Unrecognized Loss | 0 |
Available-for-sale Securities - Estimated Fair Value | 14,493 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 4,294 |
Marketable securities | 10,199 |
Available-for-sale Securities | Non-U.S. sovereign securities(1) |  |
Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities - Carrying Amount | 8 |
Available-for-sale Securities, Unrecognized Gain | 0 |
Available-for-sale Securities, Unrecognized Loss | 0 |
Available-for-sale Securities - Estimated Fair Value | 8 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 1 |
Marketable securities | 7 |
Available-for-sale Securities | Corporate debt securities(1) |  |
Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities - Carrying Amount | 256 |
Available-for-sale Securities, Unrecognized Gain | 0 |
Available-for-sale Securities, Unrecognized Loss | 0 |
Available-for-sale Securities - Estimated Fair Value | 256 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 25 |
Marketable securities | 231 |
Available-for-sale Securities | U.S. Gov't securities |  |
Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities - Carrying Amount | 14,228 |
Available-for-sale Securities, Unrecognized Gain | 1 |
Available-for-sale Securities, Unrecognized Loss | 0 |
Available-for-sale Securities - Estimated Fair Value | 14,229 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 4,268 |
Marketable securities | $ 9,961 |

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