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Receivables - Schedule of Finance and Contract Receivables on Nonaccrual Status (Detail) (USD $) In Millions, unless otherwise specified | Apr. 04, 2015 | Jan. 03, 2015
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Receivables [Abstract] |  |
Finance receivables | $ 8.3 sna_NotesAndLoansReceivableRecordedInvestmentNonAccrualStatus | $ 7.9 sna_NotesAndLoansReceivableRecordedInvestmentNonAccrualStatus
Contract receivables | $ 1.8 sna_ContractReceivableRecordedInvestmentNonaccrualStatus | $ 1.5 sna_ContractReceivableRecordedInvestmentNonaccrualStatus

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- Definition Contract receivable recorded investment nonaccrual status. + References No definition available. + Details
Name: | sna_ContractReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix: | sna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Notes and loans receivable recorded investment non-accrual status. + References No definition available. + Details
Name: | sna_NotesAndLoansReceivableRecordedInvestmentNonAccrualStatus
Namespace Prefix: | sna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration