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Quarterly Financial Data Asset impairment and MTM gains and losses (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 02, 2021 | Sep. 26, 2020 | Jun. 27, 2020 | Mar. 28, 2020 | Dec. 28, 2019 | Sep. 28, 2019 | Jun. 29, 2019 | Mar. 30, 2019 | Jan. 02, 2021 | Dec. 28, 2019 | Dec. 29, 2018
Operating profit |  |  |  |  |  |  |  |  | $ 1,761 | $ 1,401 | $ 1,706
Other income (expense) |  |  |  |  |  |  |  |  | 121 | 188 | $ (90)
Restructuring and cost reduction charges |  |  |  |  |  |  |  |  |  |  |
Operating profit | $ (22) | $ 0 | $ (14) | $ (1) | $ (27) | $ (18) | $ (65) | $ (8) | (37) | (118) |
Other income (expense) | 8 | 0 | 0 | 0 | 5 | 0 | 0 | 0 | 8 | 5 |
Gains (Losses) on mark-to-market adjustments |  |  |  |  |  |  |  |  |  |  |
Operating profit | (1) | 10 | (43) | 26 | 0 | (11) | 46 | (42) | (8) | (7) |
Other income (expense) | $ (90) | $ (7) | $ (43) | $ (14) | $ (120) | $ 32 | $ (11) | $ 1 | $ (154) | $ (98) |

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