Income Tax - Components of Net Deferred Tax Assets (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Postretirement benefits	$ 206	$ 236
Intangible assets	(1,497)	(1,502)
Investments in non-US subsidiaries	(228)	(282)
Other, net	73	128
Net deferred tax assets	$ (1,446)	$ (1,420)

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from postretirement benefits.

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Amount of deferred tax liability attributable to taxable temporary differences from intangible assets other than goodwill.

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Amount of deferred tax liability attributable to taxable temporary differences from investments in unconsolidated subsidiaries and investments in other affiliates which are not controlled nor consolidated.

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