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Pensions and Other Benefit Plans - Projected Future Benefit Payments from Company's Retirement and Other Benefit Plans (Details)
$ in Millions
Jan. 03, 2021
USD ($)
Retirement plans  
Defined Benefit Plan Disclosure [Line Items]  
2021 $ 1,257
2022 1,292
2023 1,388
2024 1,424
2025 1,494
2026-2030 8,795
Other benefit plans   
Defined Benefit Plan Disclosure [Line Items]  
2021 427
2022 440
2023 453
2024 465
2025 417
2026-2030 $ 2,273