Income Taxes - Additional Information (Detail) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)
Income Tax Disclosure [Abstract]
Effective income tax rate	167.30%	75.60%
Effective income tax rate excluding impact of non-deductable losses	30.00%	29.70%
Total unrecognized tax benefits	$ 309	$ 309
Tax benefits affecting effective tax rate	101	101
Unrecognized tax benefits impact in the next twelve months	9	9
Payment of interest accrued	24	24
Accrued penalties related to unrecognized tax benefits	$ 2	2
Tax benefit related to foreign tax audit		$ 2

Effective income tax rate excluding impact of non deductable losses.

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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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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

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Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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Amount of statutory penalties accrued for a tax position claimed or expected to be claimed by the entity, in its tax return.

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Amount of interest expense accrued for an underpayment of income taxes.

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

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