Segment Reporting - Capital Expenditures (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Other Nonoperating Income (Expense)	$ (7.3)	$ (95.9)	$ (7.1)	$ (74.3)
Payments for (Proceeds from) Productive Assets	21.8	20.8	42.2	41.2
Operating Segments
Segment Reporting Information [Line Items]
Other Nonoperating Income (Expense)	20.8	(84.2)	35.9	(58.9)
Payments for (Proceeds from) Productive Assets	7.5	7.8	15.7	14.4
EES
Segment Reporting Information [Line Items]
Other Nonoperating Income (Expense)	7.3	3.3	11.7	8.3
Payments for (Proceeds from) Productive Assets	1.8	1.3	3.0	2.6
CSS
Segment Reporting Information [Line Items]
Other Nonoperating Income (Expense)	15.7	15.7	26.6	35.2
Payments for (Proceeds from) Productive Assets	1.7	3.3	3.3	7.2
UBS
Segment Reporting Information [Line Items]
Other Nonoperating Income (Expense)	(2.2)	(103.2)	(2.4)	(102.4)
Payments for (Proceeds from) Productive Assets	4.0	3.2	9.4	4.6
Corporate Segment
Segment Reporting Information [Line Items]
Other Nonoperating Income (Expense)	(28.1)	(11.7)	(43.0)	(15.4)
Payments for (Proceeds from) Productive Assets	$ 14.3	$ 13.0	$ 26.5	$ 26.8