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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2025
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 EndedSix Months Ended
 June 30,June 30,
Award type2025202420252024
Stock appreciation rights$4.0 $3.0 $7.4 $7.6 
Restricted stock units38.7 36.4 85.3 82.0 
Common stock equivalents0.3 0.3 0.5 0.6 
Total (1)$43.0 $39.7 $93.2 $90.2 
Schedule Of Stock-Based Compensation Expense By Expense Category
Three Months EndedSix Months Ended
 June 30,June 30,
Expense category line item2025202420252024
Cost of services and product development$16.9 $15.3 $37.5 $34.8 
Selling, general and administrative26.1 24.4 55.7 55.4 
Total (1)$43.0 $39.7 $93.2 $90.2 

(1)Includes costs of $19.0 million and $18.4 million during the three months ended June 30, 2025 and 2024, respectively, and $47.0 million and $49.0 million during the six months ended June 30, 2025 and 2024, respectively, for awards to retirement-eligible employees. Those awards are expensed on an accelerated basis.