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Accounts Receivable - Schedule of Performing and Nonperforming Finance and Contract Receivables (Detail) (USD $) In Millions, unless otherwise specified	Jun. 29, 2013	Dec. 29, 2012
Financing Receivable, Recorded Investment [Line Items]
Finance Receivables	$ 902.8	$ 844.2
Contract Receivables	262.6	260.3
Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance Receivables	890.6	830.8
Contract Receivables	261.8	259.4
Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance Receivables	12.2	13.4
Contract Receivables	$ 0.8	$ 0.9

X

- Definition

Contract receivable.

+ References

No definition available.

+ Details

Name:	sna_ContractReceivable
Namespace Prefix:	sna_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Notes and loans receivable.

+ References

No definition available.

+ Details

Name:	sna_NotesAndLoansReceivable
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