XML 111 R95.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Pension Plans - Summary of Amounts Included in Accumulated Other Comprehensive Income Loss (Detail) - USD ($) $ in Millions | Dec. 31, 2016 | Jan. 02, 2016
--- | --- | ---
Compensation and Retirement Disclosure [Abstract] |  |
Net loss, net of tax of $160.6 million and $141.4 million, respectively | $ (297.0) | $ (253.7)
Prior service credit, net of tax of $1.3 million and$1.7 million, respectively | 2.2 | 2.8
Amounts included in accumulated other comprehensive income (loss) | $ (294.8) | $ (250.9)

X
- Definition Pension and other postretirement benefit plans, accumulated other comprehensive income (loss), net of tax + References No definition available. + Details
Name: | sna_PensionAndOtherPostretirementBenefitPlansAccumulatedOtherComprehensiveIncomeLossNetOfTax
Namespace Prefix: | sna_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition After tax net amount of gain (loss) that are not yet recognized as a component of net periodic benefit cost, and that are recognized as increases (decreases) in other comprehensive income as they arise. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount after tax of cost (credit) due to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as a component of net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Prior Service Cost -URI http://asc.fasb.org/extlink&oid=49177896 + Details
Name: | us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant