XML 100 R84.htm IDEA: XBRL DOCUMENT
v3.20.4

Income Taxes - Operating Loss Carry Forwards (Detail) $ in Millions | Jan. 02, 2021 USD ($)
--- | ---
Income Taxes [Line Items] |
Total net operating loss carryforwards | $ 184.1
State |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 57.0
Federal |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 0.0
Foreign |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 127.1
2021-2025 |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 58.8
2021-2025 | State |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 0.3
2021-2025 | Federal |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 0.0
2021-2025 | Foreign |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 58.5
2026-2030 |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 10.4
2026-2030 | State |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 0.0
2026-2030 | Federal |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 0.0
2026-2030 | Foreign |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 10.4
2031-2035 |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 56.7
2031-2035 | State |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 56.7
2031-2035 | Federal |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 0.0
2031-2035 | Foreign |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 0.0
2036-2040 |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 0.0
2036-2040 | State |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 0.0
2036-2040 | Federal |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 0.0
2036-2040 | Foreign |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 0.0
2041-2045 |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 31.9
2041-2045 | State |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 0.0
2041-2045 | Federal |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 0.0
2041-2045 | Foreign |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 31.9
Indefinite |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 26.3
Indefinite | State |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 0.0
Indefinite | Federal |
Income Taxes [Line Items] |
Total net operating loss carryforwards | 0.0
Indefinite | Foreign |
Income Taxes [Line Items] |
Total net operating loss carryforwards | $ 26.3

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

X
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 + Details
Name: | us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_StateAndLocalJurisdictionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_DomesticCountryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_ForeignCountryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=sna_CreditsExpiringInRangeOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=sna_CreditsExpiringInRangeTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=sna_CreditsExpiringInRangeThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=sna_CreditsExpiringInRangeFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=sna_CreditsExpiringInRangeFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=sna_IndefiniteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |