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STOCK BASED COMPENSATION (Tables)
 9 Months Ended
Sep. 30, 2025
Share-Based Payment Arrangement [Abstract]  
Schedule of RSU Activity under Equity-Based Plans
The following tables summarize RSU activity for the nine months ended September 30, 2025:
Time-based RSUs
Total Number
of Shares
Weighted-Average
Grant Date
Fair Value
Nonvested at December 31, 20241,100,001 $97.21 
Granted734,521 76.83 
Vested(458,119)90.80 
Forfeited(160,184)76.45 
Nonvested at September 30, 2025
1,216,219 $88.61 
Performance-based RSUs
Total Number of Shares
Weighted-Average
Grant Date
Fair Value
Nonvested at December 31, 2024179,907 $106.50 
Granted74,840 76.69 
Vested(4,856)84.98 
Forfeited(23,526)78.65 
Nonvested at September 30, 2025
226,365 $83.19 
Schedule of Stock Option Activity
The following table summarizes stock option activity for the nine months ended September 30, 2025:
Number
of Shares		Weighted
Average
Exercise
Price
Weighted
Average
Remaining
Contractual
Term
(in years)
Aggregate
Intrinsic
Value
(in millions)
Balance at December 31, 2024— $— — $— 
Granted270,144 76.69 9.21— 
Balance at September 30, 2025
270,144 $76.69 9.21$— 
Schedule of Weighted-Average Assumptions Used to Estimate Fair Value of Stock Options
The fair value of stock options is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions:
Stock Option Assumptions
Expected Term (in Years)Expected VolatilityRisk-Free Interest RateExpected Dividend Yield
September 30, 2025
6.542.3 %4.09 %1.43 %
Schedule of Share-Based Payment Arrangement, Activity
Additional Disclosures for Stock Options (in millions)September 30, 2025
Weighted-average grant date fair value of stock options$31.65 
Total fair value of options granted $9 
Schedule of Stock-Based Compensation Expense
Stock based compensation expense for stock-based awards made to our employees pursuant to our equity plans were as follows:  
 Three Months Ended September 30,Nine Months Ended September 30,
(in millions)2025202420252024
Cost of providing services$4 $4 $12 $12 
Sales and marketing3 3 8 9 
General and administrative9 7 23 28 
Systems development and programming costs1 1 5 4 
Total stock based compensation expense$17 $15 $48 $53 
Total stock based compensation capitalized$1 $1 $2 $2 
The table below summarizes unrecognized compensation expense as of September 30, 2025 associated with the following:
Amount
(in millions)		Weighted-Average Period (in Years)
Nonvested stock options$7 2.47
Nonvested time based RSUs100 2.56
Nonvested performance based RSUs12 1.83