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Goodwill - Schedule of Goodwill Balances by Reporting Unit (Details) - USD ($)
$ in Millions

Dec. 31, 2025

Dec. 31, 2024

Dec. 31, 2023

Goodwill [Line Items]

Goodwill

$ 1,544.6

^[1],[2]

$ 1,563.4

^[1],[2]

$ 1,586.8

Jefferson Wells

Goodwill [Line Items]

Goodwill

(55.5)

(55.5)

Americas | United States

Goodwill [Line Items]

Goodwill

1,007.2

1,007.2

1,005.8

Southern Europe | France

Goodwill [Line Items]

Goodwill

$ 80.5

$ 70.9

$ 75.6

[1]

Balances were net of accumulated impairment loss of $749.3 ($232.1 related to Northern Europe, $3.8 related to APME, $235.2 related to Right Management and $278.2 related to Corporate) as of both January 1, 2024 and December 31, 2024; and $807.4 ($24.7 related to Southern Europe, $265.5 related to Northern Europe, $3.8 related to APME, $235.2 related to Right Management and $278.2 related to Corporate) as of December 31, 2025.

[2]

Balances were net of accumulated impairment loss of $807.4 and $749.3 as of December 31, 2025 and 2024, respectively.

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