XML 88 R74.htm IDEA: XBRL DOCUMENT v3.10.0.1

Goodwill and Other Intangible Assets - Weighted-Average Amortization Periods by Major class (Detail)	12 Months Ended
	Dec. 29, 2018
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period (in years)	11 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period (in years)	15 years
Developed technology
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period (in years)	3 years
Internally developed software
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period (in years)	5 years
Patents
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period (in years)	8 years
Trademarks
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period (in years)	6 years
Other
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period (in years)	39 years

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_DevelopedTechnologyRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=sna_InternallyDevelopedSoftwareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_PatentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TrademarksMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=sna_OtherFiniteLivedIntangibleAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: