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Schedule of Weighted Average Assumptions to Determine Pension Obligations (Detail) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Post-Retirement Benefit Plans |  |  |
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items] |  |  |
Discount rate | 3.10% | 3.70% | 4.50%
Initial Medical Trend | 8.50% | 9.00% | 8.50%
Ultimate Health Care Trend | 5.00% | 5.00% | 5.00%
Medical cost trend rate decrease to ultimate rate in year | 2018 | 2018 | 2018
United States Plans |  |  |
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items] |  |  |
Discount rate | 3.60% | 4.20% |
United States Plans | Defined Benefit Pension Plans |  |  |
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items] |  |  |
Discount rate | 3.60% | 4.20% |
Salary progression rate | 3.00% | 3.00% |
Foreign Plans | Defined Benefit Pension Plans |  |  |
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items] |  |  |
Discount rate | 3.70% | 4.90% |
Salary progression rate | 3.50% | 3.40% |

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- Definition Defined benefit plan assumptions used calculating benefit obligation medical cost trend rate decrease to ultimate rate in year. + References No definition available. + Details
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- Definition Defined benefit plan assumptions used calculating benefit obligation salary progression rate. + References No definition available. + Details
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- 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 Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph j -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. Reference 2: 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=21915506&loc=d3e1928-114920 + Details
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- Definition The ultimate trend rate for health care costs. + 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 (l) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph l -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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