Income Taxes - Reconciliation of the Federal Statutory Tax Rate to Total Provisions (Detail)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Taxes computed at statutory rate	35.00%	35.00%	35.00%
State income taxes, net of federal income tax benefit	3.32%	0.02%	0.75%
Federal research credit	(0.27%)	(0.79%)
Domestic manufacturing deduction	(2.27%)	(1.74%)	(3.25%)
Equity in losses of foreign joint ventures	0.85%	1.36%	1.43%
Foreign rate differential	(0.93%)	(2.35%)	0.60%
Noncontrolling interests	(2.96%)	(4.32%)	(3.64%)
Out-of-period correction	(1.10%)	(2.57%)
Other, net	0.64%	1.38%	(0.43%)
Provision for income taxes	32.28%	25.99%	30.46%

Effective income tax rate reconciliation change in deferred taxes.

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Effective income tax rate reconciliation equity in losses of foreign joint venture.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for qualified production activity.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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