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Supplementary Data (Tables) | 3 Months Ended
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Mar. 31, 2025
Supplementary Data [Abstract] |
Accrued Liabilities | The following table presents the components of accrued liabilities.
| March 31, 2025 |  | December 31, 2024
Salaries, benefits and related expenses | $ | 294.4 |  |  | $ | 432.1 |
Interest | 39.0 |  |  | 37.5 |
Income taxes payable | 46.4 |  |  | 80.3 |
Office and related expenses | 16.9 |  |  | 18.7 |
Acquisition obligations | 5.3 |  |  | 5.3 |
Restructuring charges | 61.0 |  |  | 0.4 |
Other | 98.4 |  |  | 87.3 |
Total accrued liabilities | $ | 561.4 |  |  | $ | 661.6 |
Other Income (Expense), Net | Results of operations for the three months ended March 31, 2025 and 2024 include certain items that are not directly associated with our revenue-producing operations.
Redeemable Noncontrolling Interest [Table Text Block] | Redeemable Non-controlling Interests Many of our acquisitions include provisions under which the non-controlling equity owners may require us to purchase additional interests in a subsidiary at their discretion. Redeemable non-controlling interests are adjusted quarterly, if necessary, to their estimated redemption value, but not less than their initial fair value. Any adjustments to the redemption value impact retained earnings or additional paid in capital, except for foreign currency translation adjustments. The following table presents changes in our redeemable non-controlling interests.
| Three months ended March 31,
| 2025 |  | 2024
Balance at beginning of period | $ | 45.6 |  |  | $ | 42.3 |
Change in related non-controlling interests balance | (0.6) |  |  | (0.3) |
Changes in redemption value of redeemable non-controlling interests: |  |  |
Additions | 8.6 |  |  | — |
Redemptions and other | (5.1) |  |  | (6.1) |
Redemption value adjustments | 0.0 |  |  | 0.0 |
Currency translation adjustments | 0.1 |  |  | 0.1 |
Balance at end of period | $ | 48.6 |  |  | $ | 36.0 |

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- Definition Tabular disclosure of redeemable noncontrolling interest (as defined) included in the statement of financial position as either a liability or temporary equity. As of the date of the statement of financial position, such redeemable noncontrolling interest is currently redeemable, as defined, for cash or other assets of the entity at (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 480 -SubTopic 10 -Name Accounting Standards Codification -Section S45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479887/480-10-S45-3 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 480 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479857/480-10-S50-3 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 480 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3A -Subparagraph (24) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480244/480-10-S99-3A + Details
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