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Other Income (Expense), Net - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended
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Apr. 02, 2023 | Apr. 03, 2022
Other Income (Expense) [Line Items] |  |
Foreign currency transaction gain | $ 0.0 | $ 5.5
Business Talent Group, LLC |  |
Other Income (Expense) [Line Items] |  |
Increase to indemnification liability | $ 2.0 |
Kelly Services Japan, Inc. |  |
Other Income (Expense) [Line Items] |  |
Foreign currency transaction gain |  | $ 5.5

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