Schedule of Changes in Level 3 Plan Assets (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at January 1	$ 1,516	$ 1,411
Net Realized and Unrealized Gains/(Losses)	30	146
Net Purchases, Issuances and Settlements	497	87
Net Transfers Into/(Out of) Level 3	3	(182)
Currency Impact	63	54
Fair value of plan assets at December 31	2,109	1,516
Pooled Funds - Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at January 1	10	7
Net Realized and Unrealized Gains/(Losses)	(1)
Net Purchases, Issuances and Settlements	2
Net Transfers Into/(Out of) Level 3	4	3
Fair value of plan assets at December 31	15	10
Corporate Bonds And Other Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at January 1	794	758
Net Realized and Unrealized Gains/(Losses)	17	61
Net Purchases, Issuances and Settlements	(48)	(52)
Net Transfers Into/(Out of) Level 3	(1)	(3)
Currency Impact	18	30
Fair value of plan assets at December 31	780	794
Real Estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at January 1	239	255
Net Realized and Unrealized Gains/(Losses)	10	9
Net Purchases, Issuances and Settlements	12	149
Net Transfers Into/(Out of) Level 3		(181)
Currency Impact	6	7
Fair value of plan assets at December 31	267	239
Hedge Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at January 1	263	188
Net Realized and Unrealized Gains/(Losses)	(11)	78
Net Purchases, Issuances and Settlements	535	(12)
Currency Impact	33	9
Fair value of plan assets at December 31	820	263
Private Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at January 1	210	197
Net Realized and Unrealized Gains/(Losses)	15	4
Net Purchases, Issuances and Settlements	(4)	2
Net Transfers Into/(Out of) Level 3		(1)
Currency Impact	6	8
Fair value of plan assets at December 31	227	210
Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at January 1		6
Net Realized and Unrealized Gains/(Losses)		$ (6)

The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Actual Return on Plan Assets (Component of Net Periodic Postretirement Benefit Cost)

-URI http://asc.fasb.org/extlink&oid=6504192

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)(1)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Actual Return on Plan Assets (Component of Net Periodic Pension Cost)

-URI http://asc.fasb.org/extlink&oid=6504226

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 20

-Section 50

-Paragraph 1

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The amount of increase or decrease in plan assets attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency.

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Amount of increase (decrease) in plan assets from purchases, sales and settlement of plan obligations.

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Transfers in and out of Level 3. For example, transfers due to changes in the observability of significant inputs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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