Retirement Plans Changes in Plan Assets and Benefit Obligations (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 28, 2019 |
Dec. 29, 2018 |
Dec. 30, 2017 |
|
| Changes recognized in accumulated other comprehensive loss: | |||
| Net amount recognized | $ (45) | $ (6) | $ (16) |
| Pension Benefits | |||
| Changes recognized in accumulated other comprehensive loss: | |||
| Actuarial gain | 44 | 6 | 0 |
| Amortization of net loss | 4 | 3 | 4 |
| Settlements | 12 | 0 | 18 |
| Net amount recognized | $ 60 | $ 9 | $ 22 |