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Stock-Based Compensation Plans Stock-Based Compensation Plans (Schedule Of Future Share-Based Compensation Cost) (Details) $ in Millions	Sep. 30, 2024 USD ($)
Share -based Compensation Arrangement by Share-based Payment Award [Line Items]
Remainder of 2024	$ 10.9
2025	13.5
2026	7.4
2027	1.1
2028	0.0
Total Projected Stock-Based Compensation Expense	$ 32.9

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