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Reclassifications from Accumulated Other Comprehensive Income - Defined Benefit Plan In Other Comprehensive Income (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Amortization of pension and other benefit items    
Income (loss) before income taxes and noncontrolling interests $ 53 $ (66)
Tax benefit (1) (7)
Net income (loss) 52 (73)
Pension and Other Benefit Items | Reclassification out of Accumulated Other Comprehensive Income [Member]
   
Amortization of pension and other benefit items    
Prior service costs (10) [1],[2] (3) [1],[2]
Actuarial gains/(losses) (69) [1],[2] (100) [1],[2]
Income (loss) before income taxes and noncontrolling interests (79) [1] (103) [1]
Tax benefit 28 [1] 34 [1]
Net income (loss) $ (51) [1] $ (69) [1]
[1] Amounts in parentheses indicate debits to income/loss.
[2] These AOCI components are included in the computation of net periodic benefit cost (see Note 5 for additional details).