XML 80 R69.htm IDEA: XBRL DOCUMENT
v3.20.2

Income Taxes - Narrative (Detail) - USD ($) | 9 Months Ended
--- | ---
Sep. 26, 2020 | Sep. 28, 2019
Income Tax [Line Items] |  |
Effective income tax rate | 23.80% | 23.80%
Minimum |  |
Income Tax [Line Items] |  |
Decrease in unrecognized tax benefits | $ 0 |
Increase in unrecognized tax benefits | 0 |
Maximum |  |
Income Tax [Line Items] |  |
Decrease in unrecognized tax benefits | 700,000 |
Increase in unrecognized tax benefits | $ 800,000 |

X
- Definition Effective income tax rate on earnings attributable to Snap-on. + References No definition available. + Details
Name: | sna_EffectiveIncomeTaxRateOnEarnings
Namespace Prefix: | sna_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Income Tax [Line Items] + References No definition available. + Details
Name: | sna_IncomeTaxLineItems
Namespace Prefix: | sna_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
Name: | us-gaap_DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
Name: | us-gaap_IncreaseInUnrecognizedTaxBenefitsIsReasonablyPossible
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |