Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Domestic and Foreign Components of Income Taxes

Domestic and foreign components of Income (loss) before income taxes are shown below:

	Years Ended December 31,
In millions	2017			2016			2015
Domestic	$	180.1		$	118.3		$	144.6
Foreign	(5.3		)	(31.3		)	(8.1		)
Total	$	174.8		$	87.0		$	136.5

Schedule of Effective Income Tax Rate Reconciliation

The provision (benefit) for income taxes consisted of:

	Years Ended December 31,
In millions	2017			2016			2015
Current
Federal	$	51.6		$	37.4		$	35.3
State and local	3.7			5.0			5.0
Foreign	—			2.1			2.7
Total current	$	55.3		$	44.5		$	43.0
Deferred
Federal	$	(25.3	)	$	(2.4	)	$	7.4
State and local	(1.3		)	(0.5		)	1.7
Foreign	0.9			1.0			0.1
Total deferred	$	(25.7	)	$	(1.9	)	$	9.2
Provision (benefit) for income taxes	29.6			42.6			52.2

The following table summarizes the major differences between taxes computed at the U.S. federal statutory rate and the actual income tax provision attributable to operations:

	Years Ended December 31,
In millions, except percentage data	2017			2016			2015
Federal statutory tax rate	$	61.2		$	30.5		$	47.8
State and local income taxes, net of federal benefit	2.4			2.8			4.9
Foreign income tax rate differential	0.5			0.8			(0.4		)
Changes in valuation allowance	1.7			13.2			1.5
Domestic manufacturing deduction	(5.1		)	(4.0		)	(3.0		)
Noncontrolling interest in consolidated partnership	(6.6		)	(3.1		)	(1.9		)
Nondeductible separation costs	—			1.5			2.4
Nondeductible restructuring costs	—			2.2			—
Federal and state tax credits	(0.7		)	(0.6		)	(0.3		)
Deferred rate change	(0.4		)	(0.6		)	—
U.S. Tax Reform	(24.5		)	—			—
Other	1.1			(0.1		)	1.2
Provision (benefit) for income taxes	$	29.6		$	42.6		$	52.2
Effective tax rate	16.9		%	49.0		%	38.2		%

Schedule of Deferred Tax Assets and Liabilities

The significant components of deferred tax assets and liabilities are as follows:

	December 31,
In millions	2017			2016
Deferred tax assets:
Accrued restructuring	$	11.4		$	12.6
Employee benefits	8.0			12.3
Intangibles	3.0			5.8
Investment in partnership	1.8			1.4
Net operating losses	9.0			5.4
Start-up costs	0.8			1.0
Inventory	1.2			—
Other	5.0			2.3
Total deferred tax assets	$	40.2		$	40.8
Valuation allowance	(20.4		)	(18.8		)
Total deferred tax assets, net of valuation allowance	$	19.8		$	22.0
Deferred tax liabilities:
Fixed assets	$	57.1		$	86.9
Inventory	—			1.0
Other	0.6			0.5
Total deferred tax liabilities	$	57.7		$	88.4
Net deferred tax asset (liability)	$	(37.9	)	$	(66.4	)

Reconciliation of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amounts of unrecognized tax benefits is as follows:

	December 31,
In millions	2017			2016			2015
Balance at beginning of year	$	0.6		$	0.7		$	0.8
Additions for tax positions related to current year	—			—			0.1
Additions for tax positions related to prior years	0.1			0.1			0.1
Reductions for tax positions related to prior years	—			(0.2		)	(0.2		)
Reduction from lapse of statute of limitation	(0.4		)	—			(0.1		)
Balance at end of year	$	0.3		$	0.6		$	0.7