Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

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)	2014			2013
Balance at January 1	$	7.1		$	6.8
Additions for tax positions taken in the current year	0.6			1.7
Reduction for expiration of statute of limitations/audits	(0.8		)	(1.4		)
Balance at December 31	$	6.9		$	7.1

Schedule of Components of Income Before Income Taxes

The components of income before income taxes are:

($ in millions)	2014		2013		2012
U.S. operations	$	57.5	$	28.9	$	8.9
International operations	111.5		118.2		99.7
Total income before income taxes	$	169.0	$	147.1	$	108.6

Schedule of Components of Income Tax Expense

The related provision for income taxes consists of:

($ in millions)	2014			2013			2012
Current:
Federal	$	5.2		$	—		$	—
State	0.5			0.3			0.2
International	34.5			38.2			27.2
Current income tax provision	40.2			38.5			27.4
Deferred:
Federal and state	7.7			9.2			3.3
International	(0.7		)	(7.5		)	2.0
Deferred income tax provision	7.0			1.7			5.3
Income tax expense	$	47.2		$	40.2		$	32.7

Schedule of Deferred Tax Assets and Liabilities

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

($ in millions)	2014			2013
Deferred tax assets
Net operating loss carryforwards	$	20.4		$	20.7
Tax credit carryforwards	40.4			36.1
Restructuring and impairment charges	—			0.1
Pension and deferred compensation	43.7			51.2
Other	20.0			19.8
Valuation allowance	(22.1		)	(23.5		)
Total deferred tax assets	102.4			104.4
Deferred tax liabilities:
Accelerated depreciation	36.8			40.5
Other	7.7			5.4
Total deferred tax liabilities	44.5			45.9
Net deferred tax asset	$	57.9		$	58.5

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 follows:

	2014		2013		2012
U.S. federal corporate tax rate	35.0	%	35.0	%	35.0	%
Tax on international operations less than U.S. tax rate	(6.8	)	(5.3	)	(5.9	)
Non-benefited losses	—		—		0.6
Reversal of prior valuation allowance	(0.5	)	(1.0	)	—
Reversal of reserves for unrecognized tax benefits	(0.5	)	(0.8	)	(0.2	)
U.S. tax on international earnings, net of foreign tax credits	(0.1	)	0.1		(1.2	)
State income taxes, net of federal tax effect	1.5		0.1		(1.0	)
U.S. research and development credits	(0.9	)	(1.8	)	—
Other business credits and Section 199 Deduction	(0.7	)	(0.5	)	(1.0	)
Non-deductible debt premium	—		—		2.0
Other	1.0		1.6		1.9
Effective tax rate	28.0	%	27.4	%	30.2	%