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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2023
Share-Based Payment Arrangement [Abstract] |
Schedule Of Stock-based Compensation Expense By Award Type | The tables below summarize the Company’s stock-based compensation expense by award type and expense category line item during the periods indicated (in millions).
|  | Three Months Ended |  | Nine Months Ended
|  | September 30, |  | September 30,
Award type |  | 2023 |  | 2022 |  | 2023 |  | 2022
Stock appreciation rights |  | $ | 2.5 |  |  | $ | 2.2 |  |  | $ | 8.1 |  |  | $ | 6.6 |
Restricted stock units |  | 24.3 |  |  | 18.6 |  |  | 95.4 |  |  | 70.4 |
Common stock equivalents |  | 0.3 |  |  | 0.2 |  |  | 0.9 |  |  | 0.6 |
Total (1) |  | $ | 27.1 |  |  | $ | 21.0 |  |  | $ | 104.4 |  |  | $ | 77.6 |
Schedule Of Stock-Based Compensation Expense By Expense Category |
|  | Three Months Ended |  | Nine Months Ended
|  | September 30, |  | September 30,
Expense category line item |  | 2023 |  | 2022 |  | 2023 |  | 2022
Cost of services and product development |  | $ | 11.5 |  |  | $ | 7.6 |  |  | $ | 42.5 |  |  | $ | 27.0 |
Selling, general and administrative |  | 15.6 |  |  | 13.4 |  |  | 61.9 |  |  | 50.6 |
Total (1) |  | $ | 27.1 |  |  | $ | 21.0 |  |  | $ | 104.4 |  |  | $ | 77.6 |
(1)Includes costs of $8.5 million and $5.4 million during the three months ended September 30, 2023 and 2022, respectively, and $48.4 million and $32.7 million during the nine months ended September 30, 2023 and 2022, respectively, for awards to retirement-eligible employees. Those awards vest on an accelerated basis.

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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