Commitments and Contingencies (Future Minimum Lease Payments) (Details) $ in Millions		12 Months Ended
	Mar. 01, 2019 ft²	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Finance Lease, Right-of-Use Asset, Amortization		$ 15.4	$ 14.5	$ 13.2
Finance Lease, Interest Expense		2.7	1.7	0.7
Operating Lease, Cost		83.3	74.1	67.7
Short-term Lease, Cost		5.0	5.3	5.0
Variable Lease, Cost		27.6	26.8	24.5
Lease, Cost		134.0	122.4	111.1
Finance Lease, Right-of-Use Asset		48.1	38.4
Right-of-use assets from operating leases		327.2	213.6
Finance lease obligations		14.9	12.1
Finance Lease, Liability, Noncurrent		39.5	32.7
Current operating lease liabilities		73.4	57.5
Long-term operating lease liabilities		$ 267.6	$ 164.6
Finance Lease, Weighted Average Remaining Lease Term		3 years 3 months 18 days	3 years 4 months 24 days
Operating Lease, Weighted Average Remaining Lease Term		5 years 6 months	5 years
Finance Lease, Weighted Average Discount Rate, Percent		4.73%	4.30%
Operating Lease, Weighted Average Discount Rate, Percent		4.67%	4.14%
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]		Total property, plant and equipment, net	Total property, plant and equipment, net
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]		Long-Term Debt and Lease Obligation, Current	Long-Term Debt and Lease Obligation, Current
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]		Total long-term debt	Total long-term debt
Operating Lease, Payments		$ 76.6	$ 70.5	66.0
Finance Lease, Principal Payments		17.3	15.8	13.6
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability		26.1	21.3	14.4
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		177.1	$ 56.4	$ 98.8
Area of Leased Office Building | ft²	192,000
Operating Leases
2025		82.4
2026		75.6
2027		56.2
2028		46.4
2029		36.2
Thereafter		93.1
Total minimum lease payments		389.9
Less imputed interest		(48.9)
Present value of minimum payments		341.0
Finance Leases
2025		16.5
2026		12.8
2027		8.7
2028		17.1
2029		1.8
Thereafter		1.6
Total minimum lease payments		58.5
Less imputed interest		(4.1)
Present value of minimum payments		54.4
Leases not yet commenced, amount		$ 28.7