Year in which foreign tax credit carryfowards begin to expire.

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Deferred tax asset valuation allowance maturity.

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Gross deferred assets before application of valuation allowance.

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Gross deferred assets after application of valuation allowance.

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Total number of months over which the Corporation assesses the amount of unrecognized tax benefits that might be settled with taxing authorities.

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Undistributed earnings from foreign subsidiaries expected to be indefinitely reinvested in foreign operations.

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Amount after allocation of valuation allowances of noncurrent deferred tax asset attributable to deductible temporary differences and carryforwards. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible general business tax credit carryforwards.

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Amount of deferred tax liability attributable to taxable temporary differences, net of deferred tax asset attributable to deductible temporary differences and carryforwards net of valuation allowances expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
Income Taxes - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Examination [Line Items]
Gross deferred assets	$ 3,010,000,000
Alternative minimum tax credit carryforwards	109,000,000
Other business credit carryforwards	1,000,000
Foreign tax credit carryforwards	83,000,000
Year in which foreign tax credit carryforwards begin to expire	2016
DEFERRED INCOME TAXES	2,169,000,000us-gaap_DeferredTaxAssetsNetNoncurrent	2,319,000,000us-gaap_DeferredTaxAssetsNetNoncurrent
Net deferred tax liability	2,009,000,000	2,292,000,000
Unrecognized tax benefits that would impact effective income tax rate	528,000,000
Number of months impacting effective income tax rate if unrecognized tax benefits are recognized	12 months
The low end of the range of potential unrecognized tax benefits reasonably possible to be reduced by settlements or lapses of statutes of limitation		1,000,000
Accrued interest and penalties	62,000,000	52,000,000
Undistributed earnings from foreign subsidiaries expected to be indefinitely reinvested in foreign operations	8,300,000,000
Income taxes paid (net of refunds)	455,000,000us-gaap_IncomeTaxesPaidNet	1,353,000,000us-gaap_IncomeTaxesPaidNet	1,822,000,000us-gaap_IncomeTaxesPaidNet
Minimum [Member]
Income Tax Examination [Line Items]
The low end of the range of potential unrecognized tax benefits reasonably possible to be reduced by settlements or lapses of statutes of limitation	94,000,000
Assets Held for Sale [Member] \| HETCO [Member]
Income Tax Examination [Line Items]
DEFERRED INCOME TAXES	5,000,000
Assets Held for Sale [Member] \| Thailand and Indonesia Subsidiaries [Member]
Income Tax Examination [Line Items]
Net deferred tax liability		157,000,000
Foreign Jurisdictions [Member]
Income Tax Examination [Line Items]
Gross deferred assets	2,131,000,000
Year in which operating losses begin to expire	2029
Gross deferred assets net of valuation allowance	1,504,000,000
U.S. Federal [Member]
Income Tax Examination [Line Items]
Gross deferred assets	712,000,000
Year in which operating losses begin to expire	2020
State [Member]
Income Tax Examination [Line Items]
Gross deferred assets	$ 167,000,000
Year in which operating losses begin to expire	2015