Share-Based Compensation Plans (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Stock units awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants (in shares)	699,196	921,895
Grant date fair value	$ 102.9	$ 103.0
Share-based payment arrangement, nonvested award, cost not yet recognized, amount	$ 37.3	$ 34.4
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants (in shares)	159,836	186,460
Grant date fair value	$ 23.6	$ 21.1
Share-based payment arrangement, nonvested award, cost not yet recognized, amount	14.3	12.9
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment arrangement, nonvested award, cost not yet recognized, amount	$ 1.9	$ 5.5