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Income Taxes (Details 3)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Other Tax Carryforward [Line Items]      
Foreign tax rate differential (16.40%) (19.10%) (13.50%)
Factors effecting effective tax rate from the U.S. federal statutory rate      
Statutory rate 35.00% 35.00% 35.00%
Foreign income inclusions 48.90% 20.50% 7.10%
Impairment of Octane Additives segment goodwill 0.50% 1.30% 1.10%
Foreign tax credits (38.30%) (25.80%) (7.10%)
Pension (credit)/charge (0.30%) (8.90%) 0.50%
Permanent tax adjustments (0.20%) 0.30% (2.10%)
Amortization 0.50% 0.70% 1.70%
Tax (credit)/charge from previous years (0.60%) (1.90%) (2.90%)
Net charge/(credit) from unrecognized tax benefits 0.30% 7.70% (15.30%)
OFFP/FCPA settlement accrual 0.00% 0.00% (5.60%)
Other items and adjustments, net (0.50%) 2.00% (1.50%)
Effective Income Tax Rate 28.30% 7.00% (4.20%)
United Kingdom [Member]
      
Other Tax Carryforward [Line Items]      
Foreign tax rate differential (0.60%) (4.80%) (1.60%)