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Asset Retirement Obligations - Summary of Changes in AROs (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Asset Retirement Obligations [Line Items]          
Beginning balance $ 103 $ 96 $ 113 $ 30  
Additions     2 6  
Accretion expense 1 1 5    
Settlements/payments 1   (2)    
Remeasurement/translation 1 2 (12) 5  
Changes in estimates, including cost and timing of cash flows   3   3  
AROs acquired in the acquisition of mineral sands business       57  
Ending balance 106 102 106 102  
Current portion included in accrued liabilities 149   149   209
Asset Retirement Obligation
         
Asset Retirement Obligations [Line Items]          
Current portion included in accrued liabilities 7 2 7 2  
Noncurrent portion $ 99 $ 100 $ 99 $ 100