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Receivables - Rollforward of Allowances for Credit Losses for Finance and Contract Receivables (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 29, 2014 | Mar. 30, 2013
Receivables [Abstract] |  |
Finance receivables, Allowance for doubtful accounts, Beginning of period | $ 27.8 | $ 26.5
Finance receivables, Provision for bad debt expense | 6.2 | 3.9
Finance receivables, Charge-offs | (6.8) | (5.7)
Finance receivables, Recoveries | 1.3 | 1.1
Finance receivables, Allowance for doubtful accounts, End of period | 28.5 | 25.8
Contract receivables, Allowance for doubtful accounts, Beginning of period | 3.3 | 3.2
Contract receivables, Provision for bad debt expense | 0.6 | 1.1
Contract receivables, Charge-offs | (0.4) | (0.7)
Contract receivables, Recoveries | 0.1 |
Contract receivables, Allowance for doubtful accounts, End of period | $ 3.6 | $ 3.6

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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 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 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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- Definition Amount of expense related to estimated loss from loan and lease transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
Name: | us-gaap_ProvisionForLoanAndLeaseLosses
Namespace Prefix: | us-gaap_
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