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Stock-Based Compensation (Share-Based Payment Arrangement, Expensed and Capitalized, Amount) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Employee Stock Option
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-Based Payment Arrangement, Expense	$ 4.0	$ 4.0	$ 4.1
Share-Based Payment Arrangement, Expense, Tax Benefit	1.0	1.0	1.1
Share-Based Payment Arrangement, Amount Capitalized	2.0	1.9	1.9
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-Based Payment Arrangement, Expense	25.9	24.4	22.2
Share-Based Payment Arrangement, Expense, Tax Benefit	6.4	6.2	5.7
Share-Based Payment Arrangement, Amount Capitalized	13.2	11.3	9.7
Long Term Performance Unit [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-Based Payment Arrangement, Expense	11.4	12.0	11.1
Share-Based Payment Arrangement, Expense, Tax Benefit	2.8	3.1	2.8
Share-Based Payment Arrangement, Amount Capitalized	5.9	5.7	5.2
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-Based Payment Arrangement, Expense	1.8	2.5	2.8
Share-Based Payment Arrangement, Expense, Tax Benefit	0.5	0.6	0.7
Share-Based Payment Arrangement, Amount Capitalized	$ 1.0	$ 1.2	$ 1.2

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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