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Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2025

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of stock-based compensation expense

Presented in the table below is the stock-based compensation expense recorded in O&M expense in the accompanying Consolidated Statements of Operations for the years ended December 31:

			2025						2024						2023
RSUs and PSUs			$	30					$	34					$	23
Nonqualified employee stock purchase plan			2						2						2
Stock-based compensation			32						36						25
Income tax benefit			(7)						(8)						(6)
Stock-based compensation expense, net of tax			$	25					$	28					$	19

Restricted Stock Units

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of restricted stock unit activity

Presented in the table below is RSU and director stock unit activity for the year ended December 31, 2025:

			Shares (in thousands)						Weighted Average Grant Date Fair Value (per share)
Non-vested total as of December 31, 2024			75						$	131.20
Granted			95						129.42
Vested			(60)						133.39
Forfeited			(11)						127.01
Non-vested total as of December 31, 2025			99						$	128.63

Performance Condition

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of restricted stock unit activity

Presented in the table below is PSU activity for the year ended December 31, 2025:

			Shares (in thousands)						Weighted Average Grant Date Fair Value (per share)
Non-vested total as of December 31, 2024			322						$	130.04
Granted			211						128.59
Vested			(74)						147.45
Forfeited			(81)						106.41
Non-vested total as of December 31, 2025			378						$	130.93

Schedule of weighted average assumptions

Presented in the table below are the weighted average assumptions used in the Monte Carlo simulation and the weighted average grant date fair values of PSUs granted for the years ended December 31:

			2025						2024						2023
Expected volatility			23.25%						22.98%						25.45%
Risk-free interest rate			4.27%						4.39%						4.31%
Expected life (years)			3.0						3.0						3.0
Grant date fair value per share			$118.29						$118.95						$168.00

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