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Debt (Tables)
 6 Months Ended
Jun. 27, 2020
Debt Disclosure [Abstract]  
Components of Notes Payable
The following table presents the components of notes payable at June 27, 2020 and December 28, 2019:
 June 27, 2020December 28, 2019
(millions)Principal
amount		Effective
interest rate 		Principal
amount		Effective
interest rate
U.S. commercial paper$—  — %$3  1.78 %
Bank borrowings121  104  
Total$121  $107