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Investment in PersolKelly Asia Pacific - Narrative (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 29, 2019 USD ($) country | Dec. 30, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 29, 2019 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity in net earnings (loss) of affiliate | $ (3.6) | $ 5.2 | $ 2.7 |
Investment in equity affiliate | 117.2 | 121.3 |  |
Advances to PersolKelly Asia Pacific | 4.4 |  |  |
Accounts payable | $ 503.6 | 540.6 |  |
PersolKelly Asia Pacific |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity method investment, ownership percentage | 49.00% |  |  |
Due from PersolKelly Asia Pacific | $ 10.9 | 10.2 |  |
Advances to PersolKelly Asia Pacific |  | 7.0 |  | $ 4.4
Number of Countries in which Entity Operates | country | 10 |  |  |
TS Kelly Workforce Solutions |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Repayment of loan |  |  | $ 0.6 |
PersolKelly Asia Pacific |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Accounts payable | $ 0.2 | $ 0.2 |  |

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