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Income Taxes - Factors Effecting Effective Tax Rate from U.S. Federal Statutory Rate (Detail) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Schedule Of Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Statutory rate | 35.00% | 35.00% | 35.00%
Foreign income inclusions | 6.10% | 48.90% | 20.50%
Impairment of Octane Additives segment goodwill | 0.50% | 0.50% | 1.30%
Foreign tax credits | (1.90%) | (38.30%) | (25.80%)
Pension (credit)/charge | (0.30%) | (0.30%) | (9.70%)
Foreign tax rate differential | (14.60%) | (16.40%) | (19.10%)
Permanent tax adjustments | (2.50%) | (0.20%) | 0.30%
Amortization | 1.10% | 0.50% | 0.70%
Tax (credit)/charge from previous years | (2.90%) | (0.60%) | (1.90%)
Net charge/(credit) from unrecognized tax benefits | 0.20% | 0.30% | 7.70%
Other items and adjustments, net | (5.40%) | (0.50%) | 2.00%
Effective Income Tax Rate | 16.20% | 28.30% | 6.20%
United Kingdom [Member] |  |  |
Schedule Of Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Foreign tax rate differential | 0.90% | (0.60%) | (4.80%)

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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