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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Jan. 03, 2021
Accounting Policies [Abstract]  
Property and Equipment at Cost and Depreciable Useful Lives Cost and estimated useful lives of property and equipment by function are as follows:
Category20202019Life
 (In millions of dollars)   
Land$— $—   
Work in process0.4 2.7   
Buildings and improvements12.9 13.0 15to40 years
Computer hardware and software152.3 153.1 3to12 years
Equipment, furniture and fixtures34.8 34.1  5years
Leasehold improvements21.9 22.9 HQ: 15 years
Branches: Lesser of the lease or 5 years
Total property and equipment$222.3 $225.8