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Segment Information - Reconciliation of Consolidated Adjusted EBITDAX to Income (Loss) before Income Taxes Table (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract]    
Income (loss) before income taxes $ (1,962) $ 940
Exploration expense 299 264
DD&A 1,124 1,022
Impairments 3 29
Interest expense 183 164
Total (gains) losses on derivatives, net, less net cash from settlement of commodity derivatives 363 246
Algeria exceptional profits tax settlement 0 33
Tronox-related contingent loss 4,300 0
Less net income attributable to noncontrolling interests 43 24
Consolidated Adjusted EBITDAX $ 4,267 $ 2,674