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Employee Benefits (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 28, 2019 | Sep. 29, 2018 | Sep. 28, 2019 | Sep. 29, 2018
Components of net periodic benefit cost: |  |  |  |
Service cost | $ 2 | $ 2 | $ 6 | $ 7
Interest cost | 3 | 3 | 9 | 8
Expected return on plan assets | (2) | (3) | (7) | (8)
Amortization and other | 1 | 2 | 5 | 5
Net periodic benefit cost | 4 | $ 4 | 13 | $ 12
Estimated withdrawal liability | $ 14 |  | 14 |
Time period over which quarterly installment payments will be made | 20 years |  |  |
Defined benefit pension plan |  |  |  |
Target allocation and pension plan asset allocation |  |  |  |
Contributions expected to be made to defined benefit pension plans | $ 0 |  | $ 0 |

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