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Receivables (Schedule of Finance and Contract Receivable on Non Accrual Status) (Detail) (USD $) In Millions, unless otherwise specified	Dec. 29, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]
Finance receivables	$ 7.2	$ 6.8
Contract receivables	$ 0.9	$ 0.7

X

- 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

X

- 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

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration