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Segment Data - Schedule of Segment Data (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Segment Reporting Information [Line Items] |  |  |  |
Revenues from services | [1] | $ 4,403.3 | $ 4,752.3 | [2],[3]
Corporate expenses |  | (41.7) | (37.9) |
Intangible asset amortization expense |  | (8.3) | (8.8) |
Operating profit |  | 65.9 | 117.9 |
Interest and other expenses, net |  | (8.4) | (7.5) |
Earnings before income taxes |  | 57.5 | 110.4 |
Americas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating unit profit | [4] | 26.1 | 48.6 |
Southern Europe |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating unit profit |  | 69.9 | 89.9 |
Northern Europe |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating unit profit |  | 0.0 | 5.0 |
APME |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating unit profit |  | 19.9 | 21.1 |
Northern Europe and APME |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating unit profit |  | 115.9 | 164.6 |
Intersegment Eliminations [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from services |  | (19.8) | (19.3) | [2],[3]
United States | Americas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from services |  | 680.4 | 741.6 | [3]
Other Americas | Americas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from services |  | 356.0 | 388.6 | [3]
France | Southern Europe |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from services |  | 1,119.3 | 1,169.3 | [3]
Italy | Southern Europe |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from services |  | 404.3 | 422.2 | [3]
Other Southern Europe | Southern Europe |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from services |  | 457.7 | 476.4 | [3]
Reportable subsegments | Americas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from services |  | 1,036.4 | 1,130.2 | [2],[3]
Reportable subsegments | Southern Europe |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from services |  | 1,981.3 | 2,067.9 | [2],[3]
Reportable subsegments | Northern Europe |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from services |  | 870.3 | 967.6 | [2],[3]
Reportable subsegments | APME |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from services |  | 535.1 | 605.9 | [2],[3]
Reportable subsegments | Northern Europe and APME |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from services |  | 4,423.1 | 4,771.6 | [2],[3]
Reportable subsegments | United States | Americas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from services | [5] | 680.4 | 741.6 | [2]
Operating unit profit | [4] | 12.0 | 30.0 |
Reportable subsegments | Other Americas | Americas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from services |  | 356.0 | 388.6 | [2]
Operating unit profit | [4] | 14.1 | 18.6 |
Reportable subsegments | France | Southern Europe |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from services |  | 1,119.3 | 1,169.3 | [2]
Operating unit profit |  | 33.1 | 44.9 |
Reportable subsegments | Italy | Southern Europe |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from services |  | 404.3 | 422.2 | [2]
Operating unit profit |  | 27.4 | 30.7 |
Reportable subsegments | Other Southern Europe | Southern Europe |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from services |  | 457.7 | 476.4 | [2]
Operating unit profit |  | $ 9.4 | $ 14.3 |
[1] | Our consolidated revenues from services include fees received from our franchise offices of $3.3 and $3.9 for the three months ended March 31, 2024 and 2023, respectively. These fees are primarily based on revenues generated by the franchise offices, which were $277.2 and $250.2 for the three months ended March 31, 2024 and 2023, respectively.
[2] | (a) Effective January 1, 2024, our segment reporting was realigned to include our Puerto Rico business within Other Americas. Accordingly, United States, is now adjusted to exclude Puerto Rico. All previously reported results have been restated to conform to the current year presentation.
[3] | Effective January 1, 2024, our segment reporting was realigned to include our Puerto Rico business within Other Americas. Accordingly, United States, is now adjusted to exclude Puerto Rico. All previously reported results have been restated to conform to the current year presentation
[4] | We evaluate segment performance based on operating unit profit (“OUP”), which is equal to segment revenues less cost of services and branch and national headquarters operating costs. This profit measure does not include goodwill and intangible asset impairment charges or amortization of intangibles related to acquisitions, corporate expenses, interest and other expense amounts or income taxes.
[5] | In the United States, revenues from services included fees received from the related franchise offices of $2.4 and $3.2 for the three months ended March 31, 2024 and 2023, respectively. These fees are primarily based on revenues generated by the franchise offices, which were $87.4 and $99.3 for the three months ended March 31, 2024 and 2023, respectively.

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