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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2025

Income Tax Disclosure [Abstract]

Schedule of Reconciliation of Beginning and Ending Liability for Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of the liability for unrecognized tax benefits is as follows:

($ in millions)			2025						2024						2023
Balance at January 1			$	43.6					$	38.8					$	36.5
Increase due to current year position			16.4						5.3						6.4
Increase (decrease) due to prior year position			0.5						0.7						(1.0)
Reduction for expiration of statute of limitations/audits			(4.4)						(1.2)						(3.1)
Balance at December 31			$	56.1					$	43.6					$	38.8

Schedule of Components of Income Before Income Taxes

The components of income before income taxes and equity in net income of affiliated companies are:

($ in millions)			2025						2024						2023
U.S. operations			$	228.3					$	243.4					$	369.4
International operations			372.6						342.1						328.6
Total income before income taxes and equity in net income of affiliated companies			$	600.9					$	585.5					$	698.0

Schedule of Components of Income Tax Expense

The related provision for income taxes consists of:

($ in millions)			2025						2024						2023
Current:
Federal			$	44.3					$	29.8					$	30.2
State			8.0						2.1						(4.2)
International			83.0						79.1						58.8
Current income tax provision			135.3						111.0						84.8
Deferred:
Federal			(14.2)						(16.6)						(11.8)
State			0.2						(1.7)						0.2
International			0.3						14.8						49.1
Deferred income tax provision			(13.7)						(3.5)						37.5
Income tax expense			$	121.6					$	107.5					$	122.3

Schedule of Deferred Tax Assets and Liabilities

The significant components of our deferred tax assets and liabilities at December 31 are:

($ in millions)			2025						2024
Deferred tax assets:
Net operating loss carryforwards			$	3.2					$	6.1
Tax credit carryforwards			7.6						2.1
Pension and deferred compensation			43.9						28.9
Other			17.0						17.9
Capitalized R&D expenses			32.3						30.1
Leases			26.3						21.5
Valuation allowance			(16.2)						(12.8)
Total deferred tax assets			114.1						93.8
Deferred tax liabilities:
Property, plant, and equipment			64.7						60.9
Tax on undistributed earnings of subsidiaries			2.3						0.4
Leases			25.7						22.0
Other			6.0						5.0
Total deferred tax liabilities			98.7						88.3
Net deferred tax asset			$	15.4					$	5.5

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of the U.S. federal corporate tax rate to our effective consolidated tax rate on income before income taxes and equity in net income of affiliated companies is as follows:

			2025
			Amount ($ in millions)						Rate (%)
US federal statutory income tax rate			$	126.2					21.0		%
State and local income tax, net of federal (national) effect(1)			6.1						1.0
Foreign tax effects:
Germany:
Trade tax			18.4						3.1
Other			(3.9)						(0.7)
Ireland:
Effect of rates different than statutory			(8.8)						(1.5)
Other			3.8						0.7
Other foreign jurisdictions			0.2						—
Effect of cross border taxes:
Foreign-derived intangible income			(15.2)						(2.5)
Other			9.5						1.6
Tax Credits:
Foreign tax credit			(27.9)						(4.6)
Other			(2.9)						(0.5)
Nontaxable and nondeductible items, net			1.3						0.2
Changes in valuation allowances			5.2						0.9
Other adjustments			(2.9)						(0.6)
Changes in unrecognized tax benefits			12.5						2.1
Effective tax rate			$	121.6					20.2		%

(1) State taxes in Arizona, Illinois, and Pennsylvania, contributed to the majority of the tax effect in this category.

									2024						2023
U.S. federal corporate tax rate									21.0		%				21.0		%
Tax on international operations other than U.S. tax rate									1.5						1.2
Adjustments to reserves for unrecognized tax benefits									0.8						0.3
U.S. tax on international earnings, net of foreign tax credits									0.1						0.5
Foreign-Derived Intangible Income Deductions (FDII)									(1.2)						(1.6)
State income taxes, net of federal tax effect									0.3						0.1
U.S. research and development credits									(0.6)						(0.7)
Excess tax benefits on share-based payments									(3.3)						(4.6)
Royalty acceleration									—						0.5
Tax on undistributed earnings of subsidiaries									(0.5)						0.3
Other									0.3						0.5
Effective tax rate									18.4		%				17.5		%

Schedule of Cash Payments for Taxes

Total income taxes paid (net of refunds) consists of:

($ in millions)			2025						2024						2023
Federal			$	22.3
State			(1.0)
Foreign:
France			8.6
Germany - Federal			24.5
Germany - Eschweiler			21.8
Ireland			15.8
Other foreign			33.2
Total			$	125.2					$	71.4					$	90.8

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