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Acquisitions and Dispositions - Additional Information (Details) |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 17, 2022 USD ($) | Oct. 01, 2021 USD ($) | Sep. 30, 2020 USD ($) Business | Nov. 30, 2021 USD ($) | Dec. 31, 2021 USD ($) | Sep. 30, 2022 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Net |  |  |  |  |  | $ 405,300,000 |  | $ 371,900,000 |  | $ 405,300,000 |  |
Income tax adjustments |  |  |  |  |  |  |  | 3,100,000 |  |  |  |
Total cash consideration paid for acquisitions, net of cash acquired |  |  |  |  |  |  |  | 20,200,000 |  | 8,100,000 |  | $ 2,600,000
Payment for contingent consideration liability, financing activities |  |  |  |  |  |  |  | 3,800,000 |  | 6,300,000 |  | 1,900,000
Goodwill acquired during the period |  |  |  |  |  |  |  | 2,300,000 | [1] | 522,700,000 | [1] | 0
Intangible assets acquired during the period |  |  |  |  |  |  |  |  |  |  |  | 0
Number of businesses disposed | Business |  |  |  | 4 |  |  |  |  |  |  |  |
Net proceeds from disposal of businesses |  | $ 3,200,000 |  | $ 5,800,000 |  |  |  |  |  |  |  |
One-time loss on disposition |  | (8,000,000.0) |  |  |  |  | $ (4,100,000) | (2,100,000) |  |  |  |
Carrying value, intangible assets |  |  |  |  |  | 405,300,000 |  | 371,900,000 |  | 405,300,000 |  |
Revenues from services | [2] |  |  |  |  |  |  | 19,827,500,000 |  | 20,724,400,000 |  | 18,001,000,000.0
APME |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  |  |  |  |  |  |  | 2,387,300,000 |  | 2,481,100,000 |  | 2,376,700,000
Interest and Other Expenses (Income), Net |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
One-time loss on disposition |  | (1,700,000) |  |  |  |  |  | (1,200,000) |  |  |  |
Selling and Administrative Expenses |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
One-time loss on disposition |  | $ (9,700,000) |  |  | $ (1,200,000) |  |  | (900,000) |  |  |  | (5,800,000)
2021 Acquisitions Excluding Ettain Group [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Goodwill acquired during the period |  |  |  |  |  |  |  | 8,800,000 |  | 3,100,000 |  |
Intangible assets acquired during the period |  |  |  |  |  |  |  | $ 5,300,000 |  | 600,000 |  |
Ettain Group Member |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate cash consideration paid |  |  | $ 930,900,000 |  |  |  |  |  |  |  |  |
Draw on revolving credit facility |  |  | 150,000,000.0 |  |  |  |  |  |  |  |  |
Customer relationship intangible asset |  |  |  |  |  |  |  | 15 years |  |  |  |
Finite-Lived Intangible Assets, Net |  |  |  |  |  | 354,000,000.0 |  | $ 330,000,000.0 |  | 354,000,000.0 |  |
Working capital adjustments |  |  |  |  |  |  |  | 3,400,000 |  |  |  |
Goodwill from Acquisition for income tax purposes |  |  |  |  |  | 519,600,000 |  | 513,100,000 |  | 519,600,000 |  |
Carrying value, intangible assets |  |  |  |  |  | 354,000,000.0 |  | $ 330,000,000.0 |  | 354,000,000.0 |  |
Revenues from services |  |  |  |  |  | $ 182,700,000 |  |  |  | 21,269,100,000 |  | $ 18,731,000,000.0
Ettain Group Member | Selling and Administrative Expenses |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions and integration costs |  |  |  |  |  |  |  |  |  | $ 18,800,000 |  |
Ettain Group Member | Acquired Interests Member |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate cash consideration paid |  |  | 925,000,000.0 |  |  |  |  |  |  |  |  |
Ettain Group Member | Working Capital And Cash Member |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate cash consideration paid |  |  | $ 5,900,000 |  |  |  |  |  |  |  |  |
[1] | Balances were net of accumulated impairment loss of $644.2 ($127.0 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, 2021 and December 31, 2021; and $694.2 ($177.0 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, 2022.
[2] | (a) The United States revenues above represent revenues from our company-owned branches and franchise fees received from our franchise operations, which were $12.8, $12.8 and $12.6 for 2022, 2021 and 2020, respectively.

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