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Accumulated Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) by Component, Net of Tax (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Mar. 01, 2022 | Jul. 02, 2023 | Jul. 03, 2022 | Apr. 03, 2022 | Jul. 02, 2023 | Jul. 03, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  |  |  | $ 1,254.2 |
Amounts reclassified from accumulated other comprehensive income (loss) | $ 1.9 |  |  |  |  |
Other comprehensive income (loss) |  | $ 2.8 | $ 1.5 |  | 5.1 | $ 14.5
Ending balance |  | 1,241.9 | 1,276.9 |  | 1,241.9 | 1,276.9
Other income (expense), net |  | (0.6) | (1.1) |  | 1.4 | 1.7
PersolKelly Pte. Ltd. |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Other income (expense), net |  |  |  | $ 1.9 |  |
Foreign currency translation adjustments: |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance |  | (5.1) | (12.0) | (25.0) | (7.4) | (25.0)
Other comprehensive income (loss) before reclassifications |  | 2.8 | 1.3 |  | 5.1 | (8.6)
Other comprehensive income (loss) |  | 2.8 | 1.5 |  | 5.1 | 14.5
Ending balance |  | (2.3) | (10.5) | (12.0) | (2.3) | (10.5)
Foreign currency translation adjustments: | Liquidation of Subsidiary |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss) |  | 0.0 | 0.0 |  | 0.0 | 20.4
Foreign currency translation adjustments: | Equity Method Investment and Other |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss) |  | 0.0 | 0.2 |  | 0.0 | 2.7
Pension liability adjustments: |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance |  | (1.1) | (2.7) | (2.7) | (1.1) | (2.7)
Other comprehensive income (loss) before reclassifications |  | 0.0 | 0.0 |  | 0.0 | 0.0
Amounts reclassified from accumulated other comprehensive income (loss) |  | 0.0 | 0.0 |  | 0.0 | 0.0
Other comprehensive income (loss) |  | 0.0 | 0.0 |  | 0.0 | 0.0
Ending balance |  | (1.1) | (2.7) | (2.7) | (1.1) | (2.7)
Accumulated Other Comprehensive Income (Loss) |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance |  | (6.2) | (14.7) | (27.7) | (8.5) | (27.7)
Other comprehensive income (loss) |  | 2.8 | 1.5 |  | 5.1 | 14.5
Ending balance |  | $ (3.4) | $ (13.2) | $ (14.7) | $ (3.4) | $ (13.2)

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