v2.4.0.6
Supplemental Financial Information - Earnings Per Share (Detail) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Earnings Per Share [Line Items]      
Income (loss) from continuing operations $ (53) $ 2 $ (465)
Less: Net income (loss) attributable to non-controlling interests 63 46 50
Income (loss) from continuing operations attributable to stockholders (116) (44) (515)
Income (loss) from discontinued operations attributable to stockholders 1 434 59
Net income (loss) attributable to stockholders $ (115) $ 390 $ (456)
Weighted average number of shares outstanding (after deduction of treasury shares) during the year (in thousands):      
Weighted average number of shares outstanding (after deduction of treasury shares), Basic and diluted 248,064 248,812 229,280
Basic and diluted EPS attributable to stockholders in $:      
Income (loss) from continuing operations $ (0.46) [1] $ (0.17) [1] $ (2.25) [1]
Income (loss) from discontinued operations   $ 1.74 [1] $ 0.26 [1]
Net income (loss) $ (0.46) [1] $ 1.57 [1] $ (1.99) [1]
[1] In 2012, 32,394,794 securities (2011: 27,789,634 securities; 2010: 24,350,650 securities) that could potentially dilute basic EPS were not included in the computation of dilutive EPS because the effect would have been anti-dilutive for the periods presented.