Share-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2025

Share-Based Compensation Amounts Included in Net Income

The table below presents the amounts included in net income related to share-based compensation expense for the awards granted under the SICP for the years ended December 31, 2025, 2024 and 2023:

	For the Year Ended December 31,
	2025		2024		2023
(in millions)
Awards to key employees	$	7.6	$	7.5	$	6.7
Awards to non-employee directors	0.9		0.9		0.9
Total compensation expense	8.5		8.4		7.6
Less: tax benefit	(2.2)		(2.2)		(1.9)
Share-based compensation expense included in net income	$	6.3	$	6.2	$	5.7

Cash Proceeds Received and Tax Benefit from Share-based Payment Awards [Table Text Block]

The below table presents the number of shares withheld and amounts remitted:

	For the Year Ended December 31,
	2025		2024		2023
(dollars in millions, shares in thousands)
Shares withheld to satisfy tax obligations	8		14		20
Amounts remitted to tax authorities to satisfy obligations	$	1.0	$	1.5	$	2.5

SICP Awards to Key Employees

Summary of Stock Activity Non-employee directors

The table below presents the summary of the stock activity for awards to all officers and key employees:

(in thousands, except per share data)	Number of Shares	Weighted Average Fair Value
Outstanding — December 31, 2023	213	$	117.74
Granted	110	105.21
Vested	(43)	103.95
Expired	(27)	86.24
Forfeited	—	—
Outstanding — December 31, 2024	253	117.96
Granted	100	125.56
Vested	(37)	129.76
Expired	(26)	113.34
Forfeited	—	—
Outstanding — December 31, 2025	290	$	115.63