XML 42 R45.htm IDEA: XBRL DOCUMENT

Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Taxes [Line Items]
The effective tax rate	15.90%	19.60%	25.10%	25.30%
U.S. federal statutory rate	35.00%	35.00%		35.00%
Operational losses in certain foreign jurisdictions	$ 35
Gain from the sale of the Tapoco Hydroelectric Project	12		12
Discrete income tax charge		15	8
Maximum [Member]
Income Taxes [Line Items]
U.S. federal statutory rate			60.10%
Minimum [Member]
Income Taxes [Line Items]
U.S. federal statutory rate			35.00%
Operational losses in certain foreign jurisdictions			$ 39

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

+ References+ Details

- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

+ References+ Details