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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 | 9 Months Ended
--- | --- | --- | ---
Mar. 01, 2022 | Oct. 01, 2023 | Oct. 02, 2022 | Apr. 03, 2022 | Oct. 01, 2023 | Oct. 02, 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) |  | $ (4.3) | $ (6.9) |  | 0.8 | $ 7.6
Ending balance |  | 1,235.7 | 1,252.7 |  | 1,235.7 | 1,252.7
Other income (expense), net |  | 1.6 | 0.2 |  | 3.0 | 1.9
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 |  | (2.3) | (10.5) | (25.0) | (7.4) | (25.0)
Other comprehensive income (loss) before reclassifications |  | (4.3) | (8.8) |  | 0.8 | (17.4)
Other comprehensive income (loss) |  | (4.3) | (6.9) |  | 0.8 | 7.6
Ending balance |  | (6.6) | (17.4) |  | (6.6) | (17.4)
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 | 1.9 |  | 0.0 | 4.6
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) |  | (1.1) | (2.7)
Accumulated Other Comprehensive Income (Loss) |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance |  | (3.4) | (13.2) | $ (27.7) | (8.5) | (27.7)
Other comprehensive income (loss) |  | (4.3) | (6.9) |  | 0.8 | 7.6
Ending balance |  | $ (7.7) | $ (20.1) |  | $ (7.7) | $ (20.1)

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