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Equity and Other Investments - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]          
Contingent consideration accrued $ 15   $ 15    
Maximum amount of additional contingent consideration 50   50    
OCI Wyoming [Member]
         
Schedule of Equity Method Investments [Line Items]          
Revenue and other income from equity investment 11.00% 9.00% 11.00% 8.00%  
Contingent consideration, description     The terms of the OCI Wyoming acquisition agreement included provisions for the payment of contingent consideration to Anadarko Holding Company if OCI Wyoming achieves certain earnings results in 2013, 2014 or 2015.    
Contingent consideration accrued         $ 15