Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign

For financial reporting purposes, income before income taxes includes the following components (in millions):

	Year Ended
	Dec 31, 2017			Dec 31, 2016			Dec 31, 2015
United States	$	(32.0	)	$	(72.4	)	$	(30.2	)
Foreign	(6.9		)	(25.7		)	(120.9		)
Total	$	(38.9	)	$	(98.1	)	$	(151.1	)

Schedule of Components of Income Tax Expense (Benefit)

The provision (benefit) for income taxes consisted of the following (in millions):

	Year Ended
	Dec 31, 2017			Dec 31, 2016			Dec 31, 2015
Current tax expense (benefit):
Federal	$	0.7		$	0.6		$	(0.2	)
State	(0.9		)	(0.2		)	(1.1		)
Foreign	28.1			18.6			10.9
Deferred tax expense (benefit):
Federal	(13.5		)	(26.9		)	(20.1		)
State	3.8			(1.0		)	(0.5		)
Foreign	(2.4		)	5.2			(3.8		)
Total	$	15.8		$	(3.7	)	$	(14.8	)

Schedule of Effective Income Tax Rate Reconciliation

The reconciliation of reported income tax expense (benefit) to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income is as follows (in millions):

	Year Ended
	Dec 31, 2017			Dec 31, 2016			Dec 31, 2015
Income tax expense (benefit) at Federal statutory tax rate	$	(13.6	)	$	(34.3	)	$	(52.9	)
Foreign tax rate differential	6.2			2.5			13.2
U.S. tax reform	(16.2		)	—			—
Permanent difference	5.6			1.5			2.8
Impact of divestitures and liquidations (net of valuation allowances)	16.4			(9.0		)	(14.2		)
Change in uncertain tax positions	3.7			9.0			(8.8		)
Withholding tax and surcharges	3.5			3.0			4.3
Change in valuation allowance	6.6			26.8			39.0
Other (net)	3.6			(3.2		)	1.8
Total	$	15.8		$	(3.7	)	$	(14.8	)

Schedule of Deferred Tax Assets and Liabilities

The components of deferred tax assets and liabilities were as follows (in millions):

	Dec 31, 2017			Dec 31, 2016
Deferred tax assets:
Net operating loss carryforwards	$	202.3		$	238.7
Pension and retiree benefits accruals	25.0			33.5
Inventory	7.5			9.4
Depreciation and fixed assets	4.4			11.7
Intangibles	1.6			3.3
Tax credit carryforwards	10.9			10.3
Equity compensation	6.8			16.2
Other	27.3			53.3
Valuation allowance	(157.4		)	(177.1		)
Total deferred tax assets	128.4			199.3
Deferred tax liabilities:
Convertible debt discount	178.1			247.0
Inventory	1.2			2.4
Depreciation and fixed assets	21.8			25.7
Intangibles	3.9			4.9
Other	24.1			25.6
Total deferred tax liabilities	229.1			305.6
Net deferred tax assets (liabilities)	$	(100.7	)	$	(106.3	)

Summary of Income Tax Examinations

As of December 31, 2017, the Company has recognized deferred tax assets of approximately $62.8 million for gross tax loss carryforwards in various taxing jurisdictions as follows (in millions):

	Tax Loss
Jurisdiction	Carryforward		Expiration
United States	$	229.2	2033-2036
France	7.3		Indefinite
Others	1.7		Various
Total	$	238.2

Summary of Income Tax Contingencies

The following is a tabular reconciliation of the total amounts of unrecognized tax benefits for the year:

(in millions)	Dec 31, 2017			Dec 31, 2016			Dec 31, 2015
Unrecognized Tax Benefit — Beginning balance	$	33.4		$	25.1		$	31.9
Gross Increases — Tax Positions in Prior Period	10.7			1.6			2.1
Gross Decreases — Tax Positions in Prior Period	(3.8		)	(0.4		)	(0.6		)
Gross Increases — Tax Positions in Current Period	1.0			11.1			2.6
Dispositions	—			—			(2.2		)
Settlements	—			(0.4		)	—
Lapse of Statute of Limitations	(2.7		)	(3.3		)	(5.3		)
Impact of U.S. Tax Reform Tax Rate Reduction	(10.1		)	—			—
Foreign Currency Translation	0.1			(0.3		)	(3.4		)
Unrecognized Tax Benefit — Ending Balance	$	28.6		$	33.4		$	25.1