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Receivables - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended |
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Dec. 31, 2016 | Jan. 02, 2016
Receivables [Abstract] |  |
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 |
Minimum period past due to consider receivable balances as delinquent (days) | 30 days |
Minimum period past due to consider non-accrual finance receivables nonperforming (days) | 90 days |
Minimum period past due to declare receivable as non-accrual status (days) | 90 days |
Impaired finance receivables | $ 24.9 | $ 18.2
Impaired contract receivables | $ 2.0 | $ 1.7

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- Definition Contract receivables, extended-term installment loans, term. + References No definition available. + Details
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Namespace Prefix: | sna_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Impaired contract receivables. + References No definition available. + Details
Name: | sna_ImpairedContractReceivables
Namespace Prefix: | sna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Impaired notes and loans receivables. + References No definition available. + Details
Name: | sna_ImpairedNotesAndLoansReceivables
Namespace Prefix: | sna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Minimum period past due to consider notes and loans non-accrual receivables non-performing. + References No definition available. + Details
Name: | sna_MinimumPeriodPastDueToConsiderNotesAndLoansNonAccrualReceivablesNonPerforming
Namespace Prefix: | sna_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Minimum period past due to consider receivable balances as delinquent. + References No definition available. + Details
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Namespace Prefix: | sna_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Minimum period past due to place contract receivables on nonaccrual status. + References No definition available. + Details
Name: | sna_MinimumPeriodPastDueToPlaceContractReceivablesOnNonaccrualStatus
Namespace Prefix: | sna_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Notes and loans receivables extended term payment plan term. + References No definition available. + Details
Name: | sna_NotesAndLoansReceivablesExtendedTermPaymentPlanTerm
Namespace Prefix: | sna_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Trade and other accounts receivable, non-extended-term payment, maximum. + References No definition available. + Details
Name: | sna_TradeAndOtherAccountsReceivableNonExtendedTermPaymentMaximum
Namespace Prefix: | sna_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Trade and other accounts receivable, non-extended-term payment, minimum. + References No definition available. + Details
Name: | sna_TradeAndOtherAccountsReceivableNonExtendedTermPaymentMinimum
Namespace Prefix: | sna_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration