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Leases (Narrative) (Details)
$ in Millions
12 Months Ended
Jan. 02, 2021
USD ($)
Operating Leased Assets [Line Items]  
Commitments under certain master lease agreements $ 45
Right-of-Use Asset for which lease had not commenced As at January 2, 2021, approximately $40 million of the related finance leases had not commenced, and no amount of right-of-use assets, or lease liabilities, were recognized related to these leases on the consolidated balance sheet as of that date.
Minimum [Member]  
Operating Leased Assets [Line Items]  
Lessee, Operating Lease, Term of Contract 1 year
Maximum [Member]  
Operating Leased Assets [Line Items]  
Lessee, Operating Lease, Term of Contract 10 years
Real estate operating leases  
Operating Leased Assets [Line Items]  
Lessee, Operating Lease, Renewal Term 10 years