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Commitments and Guarantees (Details) (Unconditional Purchase Obligations)
$ in Millions
Dec. 28, 2019
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2019 $ 1,731
2020 642
2021 58
2022 5
2023 2
2025 and thereafter 7
Total unconditional purchase commitments $ 2,445