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Investments and Fair Value Measurements - Summary of Hierarchy for Assets and Liabilities Measured at Fair Value Recurring Basis (Details) - USD ($) $ in Millions | Jan. 02, 2022 | Jan. 03, 2021
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Assets: |  |
Available-for-sale securities |  | $ 1,286
Marketable equity securities | $ 107 | 376
Debt securities in government-sponsored entities |  |
Assets: |  |
Available-for-sale securities |  | 10
Corporate debt securities |  |
Assets: |  |
Available-for-sale securities |  | 445
U.S. Treasury securities |  |
Assets: |  |
Available-for-sale securities |  | 831
Fair value, Measurements, Recurring |  |
Assets: |  |
Marketable equity securities | 107 | 376
Helix contingent value right | 65 | 35
Derivative assets related to terminated acquisition | 0 | 26
Deferred compensation plan assets | 60 | 55
Total assets measured at fair value | 920 | 3,290
Liabilities: |  |
Contingent consideration liabilities | 615 | 0
Deferred compensation plan liability | 56 | 51
Total liabilities measured at fair value | 671 | 51
Fair value, Measurements, Recurring | Money market funds (cash equivalents) |  |
Assets: |  |
Money market funds (cash equivalents) | 688 | 1,512
Fair value, Measurements, Recurring | Debt securities in government-sponsored entities |  |
Assets: |  |
Available-for-sale securities | 0 | 10
Fair value, Measurements, Recurring | Corporate debt securities |  |
Assets: |  |
Available-for-sale securities | 0 | 445
Fair value, Measurements, Recurring | U.S. Treasury securities |  |
Assets: |  |
Available-for-sale securities | 0 | 831
Fair value, Measurements, Recurring | Level 1 |  |
Assets: |  |
Marketable equity securities | 107 | 376
Helix contingent value right | 0 | 0
Derivative assets related to terminated acquisition | 0 | 0
Deferred compensation plan assets | 0 | 0
Total assets measured at fair value | 795 | 2,719
Liabilities: |  |
Contingent consideration liabilities | 0 | 0
Deferred compensation plan liability | 0 | 0
Total liabilities measured at fair value | 0 | 0
Fair value, Measurements, Recurring | Level 1 | Money market funds (cash equivalents) |  |
Assets: |  |
Money market funds (cash equivalents) | 688 | 1,512
Fair value, Measurements, Recurring | Level 1 | Debt securities in government-sponsored entities |  |
Assets: |  |
Available-for-sale securities | 0 | 0
Fair value, Measurements, Recurring | Level 1 | Corporate debt securities |  |
Assets: |  |
Available-for-sale securities | 0 | 0
Fair value, Measurements, Recurring | Level 1 | U.S. Treasury securities |  |
Assets: |  |
Available-for-sale securities | 0 | 831
Fair value, Measurements, Recurring | Level 2 |  |
Assets: |  |
Marketable equity securities | 0 | 0
Helix contingent value right | 0 | 0
Derivative assets related to terminated acquisition | 0 | 0
Deferred compensation plan assets | 60 | 55
Total assets measured at fair value | 60 | 510
Liabilities: |  |
Contingent consideration liabilities | 0 | 0
Deferred compensation plan liability | 56 | 51
Total liabilities measured at fair value | 56 | 51
Fair value, Measurements, Recurring | Level 2 | Money market funds (cash equivalents) |  |
Assets: |  |
Money market funds (cash equivalents) | 0 | 0
Fair value, Measurements, Recurring | Level 2 | Debt securities in government-sponsored entities |  |
Assets: |  |
Available-for-sale securities | 0 | 10
Fair value, Measurements, Recurring | Level 2 | Corporate debt securities |  |
Assets: |  |
Available-for-sale securities | 0 | 445
Fair value, Measurements, Recurring | Level 2 | U.S. Treasury securities |  |
Assets: |  |
Available-for-sale securities | 0 | 0
Fair value, Measurements, Recurring | Level 3 |  |
Assets: |  |
Marketable equity securities | 0 | 0
Helix contingent value right | 65 | 35
Derivative assets related to terminated acquisition | 0 | 26
Deferred compensation plan assets | 0 | 0
Total assets measured at fair value | 65 | 61
Liabilities: |  |
Contingent consideration liabilities | 615 | 0
Deferred compensation plan liability | 0 | 0
Total liabilities measured at fair value | 615 | 0
Fair value, Measurements, Recurring | Level 3 | Money market funds (cash equivalents) |  |
Assets: |  |
Money market funds (cash equivalents) | 0 | 0
Fair value, Measurements, Recurring | Level 3 | Debt securities in government-sponsored entities |  |
Assets: |  |
Available-for-sale securities | 0 | 0
Fair value, Measurements, Recurring | Level 3 | Corporate debt securities |  |
Assets: |  |
Available-for-sale securities | 0 | 0
Fair value, Measurements, Recurring | Level 3 | U.S. Treasury securities |  |
Assets: |  |
Available-for-sale securities | $ 0 | $ 0

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