Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

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)	2018			2017
Balance at January 1	$	3.2		$	6.2
Increase due to current year position	0.8			0.4
Increase due to prior year position	0.4			0.1
Reduction for expiration of statute of limitations/audits	(0.5		)	(3.5		)
Balance at December 31	$	3.9		$	3.2

Schedule of Components of Income Before Income Taxes

The components of income before income taxes are:

($ in millions)	2018		2017		2016
U.S. operations	$	132.9	$	96.5	$	84.5
International operations	107.8		125.9		105.3
Total income before income taxes	$	240.7	$	222.4	$	189.8

Schedule of Components of Income Tax Expense

The related provision for income taxes consists of:

($ in millions)	2018			2017			2016
Current:
Federal	$	2.1		$	2.1		$	2.5
State	3.3			0.1			1.0
International	35.1			37.0			29.4
Current income tax provision	40.5			39.2			32.9
Deferred:
Federal and state	1.4			41.8			21.8
International	(0.5		)	(0.1		)	(0.3		)
Deferred income tax provision	0.9			41.7			21.5
Income tax expense	$	41.4		$	80.9		$	54.4

Schedule of Deferred Tax Assets and Liabilities

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

($ in millions)	2018			2017
Deferred tax assets
Net operating loss carryforwards	$	18.4		$	19.7
Tax credit carryforwards	10.5			13.7
Restructuring and impairment charges	—			0.1
Pension and deferred compensation	27.2			28.3
Other	11.4			14.3
Valuation allowance	(16.0		)	(20.9		)
Total deferred tax assets	51.5			55.2
Deferred tax liabilities:
Accelerated depreciation	31.3			26.3
Tax on undistributed earnings of subsidiaries	6.6			9.8
Other	2.0			3.8
Total deferred tax liabilities	39.9			39.9
Net deferred tax asset	$	11.6		$	15.3

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:

	2018		2017		2016
U.S. federal corporate tax rate	21.0	%	35.0	%	35.0	%
Tax on international operations other than U.S. tax rate	4.8		(4.5	)	(2.9	)
Reversal of prior valuation allowance	—		(0.5	)	(0.3	)
Adjustments to reserves for unrecognized tax benefits	0.2		(0.2	)	(0.6	)
U.S. tax on international earnings, net of foreign tax credits	(0.2	)	0.1		(1.3	)
State income taxes, net of federal tax effect	2.3		0.2		0.8
U.S. research and development credits	(0.9	)	(0.8	)	(0.8	)
Excess tax benefits on share-based payments	(6.0	)	(14.1	)	—
Impact of 2017 Tax Act	(2.9	)	15.9		—
Tax on undistributed earnings of subsidiaries	(1.3	)	4.4		—
Venezuela deconsolidation	—		1.7		—
Other business credits and Section 199 Deduction	—		(0.6	)	(1.1	)
Other	0.2		(0.2	)	(0.1	)
Effective tax rate	17.2	%	36.4	%	28.7	%