Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Employee and retiree benefits	$ 87,400	$ 132,638
Credit and net operating loss carryforwards	218,933	186,062
Trademarks and other	11,469	1,406
Amortizable R&D expenses	1,502	4,040
Gain (loss) on foreign currency translation	10,885	(8,799)
Other, net	11,692	6,016
Gross deferred tax assets	341,881	321,363
Property, plant and equipment, net	(11,745)	(17,000)
Trademarks and other	(73,979)	(55,899)
Gross deferred tax liabilities	(85,724)	(72,899)
Valuation allowance	(207,483)	(152,752)
Total net deferred tax assets	48,674	95,712
Adjustment to foreign net operating loss carryforwards	$ 58,800	$ 7,600