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Allowance for Doubtful Accounts (Tables)
 12 Months Ended
Dec. 29, 2019
Receivables [Abstract]  
Summary of changes in the allowance for doubtful accounts related to trade receivables
The following is a summary of changes in the allowance for doubtful accounts related to accounts receivable (in millions):
 
Fiscal Years Ended
 
December 29, 2019
 
December 30, 2018
 
December 31, 2017
Allowance for Doubtful Accounts
 
 
 
 
 
Balance at beginning of period
$
3.3

 
$
2.1

 
$
2.0

Provision for credit losses
1.8

 
2.2

 
0.6

Less net charge-offs
(0.9
)
 
(1.0
)
 
(0.5
)
Balance at end of period
$
4.2

 
$
3.3

 
$
2.1