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Regulatory Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2010

Regulatory Assets And Liabilities Tables Abstract

Summary Of Regulatory Assets And Liabilities

			December 31,
			2010			2009			Recovery Period

REGULATORY ASSETS			(in millions)
Current regulatory assets:
Brazil tariff recoveries:⁽¹⁾
	Energy purchases		$	62		$	144		Over tariff reset period
	Transmission costs, regulatory fees and other			82			120		Over tariff reset period
El Salvador tariff recoveries⁽²⁾				67			125		Over tariff reset period
Other⁽³⁾				1			6		Various
Total current regulatory assets				212			395

Noncurrent regulatory assets:
Defined benefit pension obligations at IPL⁽⁴⁾⁽⁵⁾				235			217		Various
Income taxes recoverable from customers⁽⁴⁾⁽⁶⁾				66			70		Various
Brazil tariff recoveries:⁽¹⁾
	Energy purchases			18			22		Over tariff reset period
	Transmission costs, regulatory fees and other			32			30		Over tariff reset period
Other ⁽³⁾				119			111		Various
Total noncurrent regulatory assets				470			450
TOTAL REGULATORY ASSETS			$	682		$	845

REGULATORY LIABILITIES
Current regulatory liabilities:
Efficiency program costs⁽⁷⁾			$	58		$	133		Over tariff reset period
Brazil tariff recoveries:⁽¹⁾
	Energy purchases			118			61		Over tariff reset period
	Transmission costs, regulatory fees and other			71			67		Over tariff reset period
Other⁽⁸⁾				39			35		Various
Total current regulatory liabilities				286			296

Noncurrent regulatory liabilities:
Asset retirement obligations ⁽⁹⁾				509			482		Over life of assets
Brazil special obligations⁽¹⁰⁾				435			402		To be determined
Brazil tariff recoveries:⁽¹⁾
	Energy purchases			69			42		Over tariff reset period
	Transmission costs, regulatory fees and other			57			35		Over tariff reset period
Efficiency program costs⁽⁷⁾				54			4		Over tariff reset period
Other⁽⁸⁾				13			17		Various
Total noncurrent regulatory liabilities				1,137			982
TOTAL REGULATORY LIABILITIES			$	1,423		$	1,278

Summary Of Regulatory Assets By Region

		December 31,
		2010			2009

		(in millions)
Latin America		$	265		$	445
North America			417			400
Total regulatory assets		$	682		$	845

Summary Of Regulatory Liabilities By Region

		December 31,
		2010			2009

		(in millions)
Latin America		$	897		$	772
North America			526			506
Total regulatory liabilities		$	1,423		$	1,278