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Accounts Receivable - Rollforward of Allowances for Credit Losses for Finance and Contract Receivables (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
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Sep. 28, 2013 | Sep. 29, 2012 | Sep. 28, 2013 | Sep. 29, 2012
Receivables [Abstract] |  |  |  |
Finance receivables, Allowance for doubtful accounts, Beginning of period | $ 26.6 | $ 25.4 | $ 26.5 | $ 24.2
Finance receivables, Provision for bad debt expense | 5.5 | 5.1 | 15.0 | 13.8
Finance receivables, Charge-offs | (5.5) | (4.9) | (17.1) | (14.5)
Finance receivables, Recoveries | 1.1 | 1.1 | 3.4 | 3.2
Finance receivables, Currency translation |  |  | (0.1) |
Finance receivables, Allowance for doubtful accounts, End of period | 27.7 | 26.7 | 27.7 | 26.7
Contract receivables, Allowance for doubtful accounts, Beginning of period | 3.5 | 4.2 | 3.2 | 4.1
Contract receivables, Provision for bad debt expense | 0.2 | (0.5) | 1.7 | 0.1
Contract receivables, Charge-offs | (0.4) | (0.5) | (1.6) | (1.2)
Contract receivables, Recoveries | 0.1 | 0.1 | 0.2 | 0.3
Contract receivables, Currency translation |  |  | (0.1) |
Contract receivables, Allowance for doubtful accounts, End of period | $ 3.4 | $ 3.3 | $ 3.4 | $ 3.3

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- Definition Contract receivable allowance for credit losses. + References No definition available. + Details
Name: | sna_ContractReceivableAllowanceForCreditLosses
Namespace Prefix: | sna_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Contract receivable, charge-offs. + References No definition available. + Details
Name: | sna_ContractReceivableChargeOffs
Namespace Prefix: | sna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Contract Receivables Foreign Currency Translation Adjustments + References No definition available. + Details
Name: | sna_ContractReceivablesForeignCurrencyTranslationAdjustments
Namespace Prefix: | sna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Contract receivables provision for bad debt expense. + References No definition available. + Details
Name: | sna_ContractReceivablesProvisionForBadDebtExpense
Namespace Prefix: | sna_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Contract receivables, recoveries. + References No definition available. + Details
Name: | sna_ContractReceivablesRecoveries
Namespace Prefix: | sna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Notes and loans receivable allowance for credit losses. + References No definition available. + Details
Name: | sna_NotesAndLoansReceivableAllowanceForCreditLosses
Namespace Prefix: | sna_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Notes and loans receivable allowance for credit losses currency translation adjustment. + References No definition available. + Details
Name: | sna_NotesAndLoansReceivableAllowanceForCreditLossesCurrencyTranslationAdjustment
Namespace Prefix: | sna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Notes and loans receivable allowance for credit losses provisions. + References No definition available. + Details
Name: | sna_NotesAndLoansReceivableAllowanceForCreditLossesProvisions
Namespace Prefix: | sna_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Notes and loans receivable allowance for credit losses recoveries. + References No definition available. + Details
Name: | sna_NotesAndLoansReceivableAllowanceForCreditLossesRecoveries
Namespace Prefix: | sna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Notes and loans receivable allowance for credit losses write offs. + References No definition available. + Details
Name: | sna_NotesAndLoansReceivableAllowanceForCreditLossesWriteOffs
Namespace Prefix: | sna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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