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Assets Held for Sale - Narrative (Details) - USD ($) $ in Millions | Jan. 03, 2021 | Dec. 29, 2019
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Assets Held for Sale [Abstract] |  |
Properties held for sale | $ 0.0 | $ 21.2

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- Definition Assets Held for Sale [Abstract] + References No definition available. + Details
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Namespace Prefix: | kelya_
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- Definition Amount of assets held-for-sale that are not part of a disposal group. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 15 -Paragraph 4 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=121558832&loc=d3e400-110220 + Details
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Period Type: | instant