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Receivables - Narrative (Detail) $ in Millions | 3 Months Ended
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Apr. 03, 2021 portfolioSegment | Mar. 28, 2020 USD ($)
Financing Receivable, Past Due [Line Items] |  |
Minimum payment term for trade and other accounts receivable (in days) | 30 days |
Maximum payment term for trade and other accounts receivable (in days) | 120 days |
Average payment term for finance receivables (in years) | 4 years |
Maximum payment term for contract receivables (in years) | 10 years |
Number of portfolio segments | portfolioSegment | 2 |
Minimum period past due to consider receivable balances as delinquent (in days) | 30 days |
Minimum period past due to declare receivable as non-accrual status (in days) | 90 days |
Finance Receivables |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, threshold period past due, writeoff (in days) | 120 days |
Financing receivable, threshold period after asset repossession, writeoff (in days) | 60 days |
Finance Receivables | COVID-19 Pandemic |  |
Financing Receivable, Past Due [Line Items] |  |
Provision for credit losses |  | $ 2.1
Contract Receivables | COVID-19 Pandemic |  |
Financing Receivable, Past Due [Line Items] |  |
Provision for credit losses |  | $ 0.5
Contract Receivables | Non-Franchisee |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, threshold period past due, writeoff (in days) | 150 days |
Contract Receivables | Franchisee |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, threshold period past due, writeoff (in days) | 180 days |
Financing Receivables And Contract Receivables, Customer Bankruptcy |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, threshold period past due, writeoff (in days) | 180 days |

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- Definition Threshold period for when financing receivable is considered past due to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919253-210447 + Details
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