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Weighted Average Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Pension Benefit Obligations
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items]
Discount rate	3.00%	3.00%
Rate of compensation increase	3.20%	3.30%
Postemployment Benefit Obligations
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items]
Discount rate	3.80%	3.40%
Rate of compensation increase	3.70%	3.80%
Involuntary turnover rate	1.00%	1.00%
Pension Benefit Costs
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items]
Discount rate	3.00%	3.70%
Rate of compensation increase	3.30%	3.30%
Expected return on plan assets	3.40%	4.00%
Postemployment Benefit Costs
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items]
Discount rate	3.40%	4.10%
Rate of compensation increase	3.80%	3.70%
Involuntary turnover rate	1.00%	1.50%

X

- Definition

Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Involuntary Turnover Rate

+ References

No definition available.

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X

- Definition

Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Involuntary Turnover Rate

+ References

No definition available.

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X

- Definition

The interest rate used to adjust for the time value of money for the plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(1)

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

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X

- Definition

Expected rate of compensation increases (for pay-related plans).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(2)

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

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X

- Definition

The interest rate used to adjust for the time value of money.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(1)

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

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X

- Definition

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Expected Long-Term Rate of Return on Plan Assets

-URI http://asc.fasb.org/extlink&oid=6512013



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

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-Section 50

-Paragraph 1

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

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X

- Definition

Expected rate of compensation increases (for pay-related plans).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(2)

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

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