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Income Taxes - Net Tax Effect of State and Foreign Loss Carryforwards (Details) (USD $) In Millions, unless otherwise specified | Dec. 28, 2014
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Operating Loss Carryforwards [Line Items] |
No expiration | $ 41.3 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration
Total | 47.2 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration
2015-2017 |
Operating Loss Carryforwards [Line Items] |
Total | 1.9 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration / us-gaap_TaxPeriodAxis = kelya_ExpiringinYears2015to2017Member
2018-2020 |
Operating Loss Carryforwards [Line Items] |
Total | 2.5 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration / us-gaap_TaxPeriodAxis = kelya_ExpiringinYears2018to2020Member
2021-2024 |
Operating Loss Carryforwards [Line Items] |
Total | 1.2 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration / us-gaap_TaxPeriodAxis = kelya_ExpiringinYears2021to2024Member
2025-2031 |
Operating Loss Carryforwards [Line Items] |
Total | $ 0.3 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration / us-gaap_TaxPeriodAxis = kelya_ExpiringinYears2025to2031Member

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are not subject to expiration dates. + References No definition available. + Details
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