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Stock Transactions And Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2025
Share-Based Payment Arrangement [Abstract]  
Summary of Share Activity
The following table summarizes the Company’s stock activity (shares in millions):
Year Ended December 31,
202520242023
Common stock - shares issued:
Balance, beginning of period174.2 173.3 163.7 
Issuance of common stock 1.2 0.9 9.6 
Balance, end of period175.4 174.2 173.3 
Summary of Assumption Used in the Black-Scholes Value Options Granted
The following summarizes the assumptions used in the Black-Scholes model to value Options granted during the years ended December 31:
202520242023
Risk-free interest rate
4.1 – 4.2%
3.7 – 4.5%
3.9 – 4.4%
Weighted average volatility36.7 %34.9 %35.2 %
Dividend yield— %— %— %
Expected years until exercise
6.0
6.0
6.0
Components Of Stock-Based Compensation Program
The following summarizes the components of the Company’s stock-based compensation expense for the years ended December 31 ($ in millions):
202520242023
RSUs / PSUs$28.3 $25.7 $20.3 
Options / PSOs9.3 9.6 10.4 
Total stock-based compensation expense$37.6 $35.3 $30.7 
Schedule of Option Activity
The following summarizes the Company’s Option and PSO activity (in millions; except price per share and numbers of years):
Number of Stock Options / PSOs
Weighted
Average
Exercise Price
Weighted Average
Remaining
Contractual Term
(in years)
Aggregate
Intrinsic
Value
Outstanding as of December 31, 20226.5 $26.24 
Granted
0.4 $38.03 
Exercised
(0.6)$18.87 
Cancelled/forfeited
(0.7)$35.19 
Outstanding as of December 31, 20235.6 $26.90 
Granted
2.6 $19.67 
Exercised
(0.2)$15.04 
Cancelled/forfeited
(0.6)$29.24 
Outstanding as of December 31, 20247.4 $24.51 
Granted
0.9 $20.62 
Exercised
(0.2)$15.30 
Cancelled/forfeited
(0.4)$26.83 
Outstanding as of December 31, 20257.7 $24.25 5.4$11.1 
Vested and expected to vest as of December 31, 2025
7.4 $24.46 5.3$10.3 
Vested as of December 31, 2025
5.2 $26.00 4.0$6.4 
Schedule of Options Outstanding
Options and PSOs outstanding as of December 31, 2025 are summarized below (in millions; except price per share and numbers of years):
OutstandingExercisable
Exercise PriceNumber of Stock Options / PSOsAverage
Exercise Price		Average
Remaining
Life
(in years)		Number of Stock Options / PSOsAverage
Exercise Price
$12.65 to $17.72
0.4 $15.26 1.10.4 $15.20 
$17.73 to $19.02
2.0 $18.54 7.70.8 $18.51 
$19.03 to $22.65
2.9 $21.11 5.31.7 $20.98 
$22.66 to $37.94
1.8 $31.28 3.91.8 $31.28 
$37.95 to $48.52
0.6 $43.08 5.40.5 $44.01 
Summary Information of Unvested RSUs and PSUs Activity
The following summarizes information on unvested RSU and PSU activity related to the Company’s employees and non-employee directors (in millions; except weighted average grant-date fair value):
Number of
RSUs/PSUs		Weighted Average
Grant-Date Fair Value
Unvested at December 31, 20221.5 $34.85 
Granted1.0 $39.93 
Vested(0.6)$30.93 
Forfeited(0.2)$39.44 
Unvested at December 31, 20231.7 $38.56 
Granted2.2 $21.07 
Vested(0.7)$33.87 
Forfeited(0.3)$30.45 
Unvested at December 31, 20242.9 $27.37 
Granted1.4 $18.88 
Vested(0.9)$28.64 
Forfeited(0.2)$23.86 
Unvested at December 31, 20253.2 $23.68