Stock-Based Compensation (Components Of Stock-Based Compensation) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	$ 19.6	$ 26.5	$ 27.6
Total tax benefits associated with stock-based compensation	0.8	3.6	4.9
To Be Settled With Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-related compensation expense (income)	15.0	19.3	18.6
Employee contributions for above stock plans	4.6	7.2	9.0
Total stock-based compensation	19.6	26.5	27.6
Total tax benefits associated with stock-based compensation	3.6	4.7	4.5
To Be Settled With Stock \| Accounting Standards Update 2016-13
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total tax benefits associated with stock-based compensation	(2.8)	(1.1)	0.4
To Be Settled With Stock \| Executive Stock Unit (ESU) program contributions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-related compensation expense (income)	2.7	3.7	3.0
To Be Settled With Stock \| Deferred Stock Compensation Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-related compensation expense (income)	0.6	1.2	1.5
To Be Settled With Stock \| ESU program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-related compensation expense (income)	0.5	1.0	1.2
To Be Settled With Stock \| Discount Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-related compensation expense (income)	0.6	0.7	0.7
To Be Settled With Stock \| PSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-related compensation expense (income)	1.1	0.1	2.6
To Be Settled With Stock \| RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-related compensation expense (income)	8.8	11.8	8.8
To Be Settled With Stock \| Other, primarily non-employee directors restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-related compensation expense (income)	0.7	0.8	0.8
To Be Settled In Cash
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-related compensation expense (income)	2.2	(0.1)	1.3
To Be Settled In Cash \| Executive Stock Unit (ESU) program contributions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-related compensation expense (income)	0.7	0.7	0.7
To Be Settled In Cash \| Deferred Stock Compensation Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-related compensation expense (income)	0.0	0.0	0.0
To Be Settled In Cash \| ESU program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-related compensation expense (income)	0.0	0.0	0.0
To Be Settled In Cash \| Discount Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-related compensation expense (income)	0.0	0.0	0.0
To Be Settled In Cash \| PSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-related compensation expense (income)	1.5	(0.8)	0.6
To Be Settled In Cash \| RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-related compensation expense (income)	0.0	0.0	0.0
To Be Settled In Cash \| Other, primarily non-employee directors restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-related compensation expense (income)	$ 0.0	$ 0.0	$ 0.0

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