Pensions and Other Postretirement Benefits (Net Periodic Benefit Costs) (Details) - Pension and other postretirement benefits - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 7.4	$ 7.8	$ 14.9	$ 15.7
Interest cost	16.3	16.7	32.5	33.3
Expected return on plan assets	(16.8)	(16.9)	(33.6)	(33.8)
Amortization of prior service costs	0.0	0.6	0.0	1.1
Net periodic benefit cost	$ 4.0	$ 4.0	$ 8.0	$ 7.8