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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Operating Loss Carryforwards [Line Items]

Summary of Tax Credit Carryforwards [Table Text Block]

The benefit relating to capital loss, net operating loss (NOL) and credit carryovers included in the above table at December 31, 2017 consists of:

Dollar amounts in millions	Expiration Beginning in	Benefit Amount			Valuation Allowance
State NOL carryovers	2018	14.1			(1.4		)
State credit carryovers	2018	0.7			(0.1		)
Canadian NOL carryovers	2034	16.7			—
Canadian capital loss carryovers	Indefinitely	6.2			(6.2		)
Canadian credit carryovers	2018	2.7			—
Chilean NOL carryovers	Indefinitely	2.0			(2.0		)
		$	42.4		$	(9.7	)

We periodically review the need for valuation allowances against deferred tax assets and recognizes these deferred tax assets to the extent that their realization is more likely than not. As part of our review, we consider all positive and negative evidence, including earnings history, the future reversal of deferred tax liabilities, and the relevant expirations of carryforwards. We believe that the valuation allowances provided are appropriate. If future years’ earnings differ from the estimates used to establish these valuation allowances or other objective positive or negative evidence arises, we may be required to record an adjustment resulting in an impact on tax expense (benefit) for that period.

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

oss) from continuing operations before income taxes consists of the following:

	Year ended December 31,
Dollar amounts in millions	2017				2016				2015
Domestic	$	341.8			$	98.4			$	(8.7	)
Foreign	168.4				71.7				(80.0		)
Total	$	510.2			$	170.1			$	(88.7	)

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Year ended December 31,
Dollar amounts in millions	2017				2016				2015
Current tax provision (benefit):
U.S. federal	$	105.8			$	60.4			$	(2.4	)
State and local	4.4				4.4				(0.5		)
Foreign	7.9				10.4				2.6
Net current tax provision (benefit)	118.1				75.2				(0.3		)
Deferred tax provision (benefit):
U.S. federal	(19.3		)		(48.1		)		(1.1		)
State and local	8.0				1.2				(1.8		)
Foreign	38.2				11.7				(26.6		)
Net valuation allowance increase (decrease)	(25.9		)		(20.2		)		27.1
Net deferred tax benefit	1.0				(55.4		)		(2.4		)
Total income tax provision (benefit)	$	119.1			$	19.8			$	(2.7	)

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

The tax effects of significant temporary differences creating deferred tax (assets) and liabilities at December 31 were as follows:

	December 31,
Dollar amounts in millions	2017				2016
Accrued liabilities	53.4				83.9
Benefit of capital loss and NOL carryovers	38.9				83.4
Other	10.2				11.6
Inventories	6.6				6.9
Market value write down of ARS	4.9				8.8
Benefit of tax credit carryovers	3.5				3.7
Valuation allowance	(13.6		)		(37.9		)
Total deferred tax assets	103.9				160.4
Property, plant and equipment	(118.2		)		(164.2		)
Timber and timberlands	(11.4		)		(11.6		)
Installment sale gain deferral	(5.2		)		(8.0		)
Total deferred tax liabilities	(134.8		)		(183.8		)
Net deferred tax liabilities	$	(30.9	)		$	(23.4	)
Balance sheet classification
Long-term deferred tax asset	2.5				4.3
Long-term deferred tax liability	(33.4		)		(27.7		)
	$	(30.9	)		$	(23.4	)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

The following table summarizes the differences between the statutory U.S. federal and effective income tax rates on continuing operations:

	Year ended December 31,
	2017			2016			2015
U.S. federal tax rate	35	%		35	%		(35	)%
State and local income taxes	2			2			(2	)
Effect of foreign tax rates	(3	)		(5	)		13
Effect of foreign exchange on functional currencies	1			2			(8	)
Tax credits	(1	)		(12	)		—
Capital gain - timber	—			(15	)		—
Stock-based compensation	—			(2	)		—
Domestic manufacturing deduction	(2	)		(2	)		—
Valuation allowance	(6	)		(12	)		31
Uncertain tax positions	1			21			(4	)
Effect of U.S. federal rate change on deferred taxes	(3	)		—			—
Other, net	(1	)		—			2
Effective tax rate (%)	23	%		12	%		(3	)%

Summary of Income Tax Contingencies [Table Text Block]

In accordance with the accounting for uncertain tax positions, the following is a tabular reconciliation of the total amount of unrecognized tax benefits at the beginning and end of the years presented:

	December 31,
Dollar amounts in millions	2017				2016				2015
Beginning balance	$	39.8			$	4.1			$	42.2
Increases:
Tax positions taken in current year	0.6				26.9				—
Tax positions taken in prior years	1.2				10.4				0.9
Decreases:
Tax positions taken in current year	—				—				—
Tax positions taken in prior years	(1.3		)		—				(0.5		)
Settlements during the year	—				—				(34.7		)
Lapse of statute in current year	—				(1.6		)		(3.8		)
Ending balance	$	40.3			$	39.8			$	4.1

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure of income before income tax between domestic and foreign jurisdictions.

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Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months.

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Tabular disclosure of tax credit carryforwards available to reduce future taxable income, including amounts, expiration dates, limitations on use and the related deferred tax assets and valuation allowances.

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