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Pensions and Other Benefit Plans - Amounts Expected to be Recognized in Net Periodic Benefit Cost (Details)
$ in Millions
Dec. 29, 2019
USD ($)
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]  
Amortization of net transition obligation $ 0
Amortization of net actuarial losses 1,022
Amortization of prior service credit $ 29