Stockholders' Equity - Classification and Amount of Reclassifications from Accumulated Other Comprehensive Income to Consolidated Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended								9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income (Loss) [Line Items]
Other non-operating expense, net						$ (1,910)			$ (7,532)	$ (7,331)	$ (68,110)	$ (31,959)
(Loss) Income Before Income Taxes	$ 54,274	$ 72,592	$ (230,064)	$ (313,905)	$ (350,794)	63,863	$ (72,043)	$ (142,271)	(150,451)	(417,103)	(501,245)	402,042
Provision for income taxes						(777,308)			(728,835)	(116,196)	(553,334)	(89,134)
Net (Loss) Income	$ 9,639	$ 6,278	$ (237,963)	$ (311,253)	$ (175,293)	$ (713,445)	$ (54,885)	$ (110,956)	$ (879,286)	(533,299)	(1,054,579)	312,908
Reclassification Out of Accumulated Other Comprehensive Income (Loss) | Derivative Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of sales										(8,575)	(16,717)	17,101
Provision for income taxes										148	(93)	(474)
Reclassification Out of Accumulated Other Comprehensive Income (Loss) | Defined Benefit Pension Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income (Loss) [Line Items]
(Loss) Income Before Income Taxes										(10,177)	(8,643)	(9,790)
Provision for income taxes										2,345	1,964	3,482
Net (Loss) Income										(7,832)	(6,679)	(6,308)
Reclassification Out of Accumulated Other Comprehensive Income (Loss) | Amortization of prior service cost
Reclassification Adjustment out of Accumulated Other Comprehensive Income (Loss) [Line Items]
Other non-operating expense, net										2,008	(29)	(461)
Reclassification Out of Accumulated Other Comprehensive Income (Loss) | Recognized actuarial loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income (Loss) [Line Items]
Other non-operating expense, net										(8,198)	(8,511)	(7,142)
Reclassification Out of Accumulated Other Comprehensive Income (Loss) | Curtailment loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income (Loss) [Line Items]
Other non-operating expense, net										(739)	(103)	(415)
Reclassification Out of Accumulated Other Comprehensive Income (Loss) | Settlement loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income (Loss) [Line Items]
Other non-operating expense, net										(3,248)	0	(1,772)
Reclassification Out of Accumulated Other Comprehensive Income (Loss) | Currency Translation Adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income (Loss) [Line Items]
Other non-operating expense, net										0	(58,973)	0
Provision for income taxes										0	0	0
Net (Loss) Income										$ 0	$ (58,973)	$ 0