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Lease Commitments - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 29, 2019
Dec. 30, 2018
Dec. 31, 2017
Lessee, Lease, Description [Line Items]      
Operating lease costs $ 307 $ 332 $ 372
Cash paid for operating leases $ 308    
Weighted average remaining lease term 5 years 9 months 18 days    
Weighted average discount rate 3.00%    
Minimum      
Lessee, Lease, Description [Line Items]      
Lease term 1 year    
Maximum      
Lessee, Lease, Description [Line Items]      
Lease term 55 years