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Schedule of Weighted Average Pension Asset Allocations by Category (Detail) (Defined Benefit Pension Plans) | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
United States Plan |  |
Defined Benefit Plan Disclosure |  |
Fixed Income Securities | 100.00% | 100.00%
United States Plan | Debt Securities |  |
Defined Benefit Plan Disclosure |  |
Fixed Income Securities | 85.80% | 86.70%
United States Plan | Equity Securities |  |
Defined Benefit Plan Disclosure |  |
Fixed Income Securities | 13.00% | 12.30%
United States Plan | Other than Securities Investment |  |
Defined Benefit Plan Disclosure |  |
Fixed Income Securities | 1.20% | 1.00%
Foreign Plans |  |
Defined Benefit Plan Disclosure |  |
Fixed Income Securities | 100.00% | 100.00%
Foreign Plans | Debt Securities |  |
Defined Benefit Plan Disclosure |  |
Fixed Income Securities | 49.20% | 49.70%
Foreign Plans | Equity Securities |  |
Defined Benefit Plan Disclosure |  |
Fixed Income Securities | 49.60% | 48.30%
Foreign Plans | Other than Securities Investment |  |
Defined Benefit Plan Disclosure |  |
Fixed Income Securities | 1.20% | 2.00%

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- Definition Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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