Stock-Based Compensation (Schedule of Share-Based Payment Arrangement, Expensed and Capitalized, Amount) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Employee Stock Option
Share-Based Payment Arrangement, Additional Disclosure [Abstract]
Share-Based Payment Arrangement, Expense	$ 1.1	$ 1.1	$ 2.2	$ 2.1
Share-Based Payment Arrangement, Expense, Tax Benefit	0.3	0.3	0.6	0.6
Share-Based Payment Arrangement, Amount Capitalized	0.5	0.6	1.0	1.1
Other Equity Awards [Member]
Share-Based Payment Arrangement, Additional Disclosure [Abstract]
Share-Based Payment Arrangement, Expense	9.8	10.1	19.7	17.8
Share-Based Payment Arrangement, Expense, Tax Benefit	2.5	2.6	5.0	4.6
Share-Based Payment Arrangement, Amount Capitalized	$ 4.6	$ 4.4	$ 9.1	$ 7.6