Regulatory Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2011

Regulatory Assets And Liabilities Tables [Abstract]

Schedule of Regulatory Assets and Liabilities [Text Block]

		December 31,
		2011		2010		Recovery Period

REGULATORY ASSETS		(in millions)
Current regulatory assets:
Brazil tariff recoveries:⁽¹⁾
	Energy purchases	$	79	$	62	Over tariff reset period
	Transmission costs, regulatory fees and other		185		82	Over tariff reset period
El Salvador tariff recoveries⁽²⁾			108		67	Over tariff reset period
Other⁽³⁾			19		1	Various
Total current regulatory assets			391		212

Noncurrent regulatory assets:
Defined benefit pension obligations at IPL and DPL⁽⁴⁾⁽⁵⁾			399		235	Various
Income taxes recoverable from customers⁽⁴⁾⁽⁶⁾			76		66	Various
Brazil tariff recoveries:⁽¹⁾
	Energy purchases		84		18	Over tariff reset period
	Transmission costs, regulatory fees and other		86		32	Over tariff reset period
Deferred Midwest ISO costs⁽⁷⁾			80		80	To be determined
Other⁽³⁾			122		39	Various
Total noncurrent regulatory assets			847		470
TOTAL REGULATORY ASSETS		$	1,238	$	682

REGULATORY LIABILITIES
Current regulatory liabilities:
Brazil tariff reset adjustment⁽⁸⁾		$	190	$	-	To be determined
Efficiency program costs⁽⁹⁾			29		58	Over tariff reset period
Brazil tariff recoveries:⁽¹⁾
	Energy purchases		305		118	Over tariff reset period
	Transmission costs, regulatory fees and other		172		71	Over tariff reset period
Other⁽¹⁰⁾			37		37	Various
Total current regulatory liabilities			733		284

Noncurrent regulatory liabilities:
Asset retirement obligations⁽¹¹⁾			649		509	Over life of assets
Brazil special obligations⁽¹²⁾			422		435	To be determined
Brazil tariff recoveries:⁽¹⁾
	Energy purchases		76		69	Over tariff reset period
	Transmission costs, regulatory fees and other		64		57	Over tariff reset period
Efficiency program costs⁽⁹⁾			44		54	Over tariff reset period
Other⁽¹⁰⁾			24		8	Various
Total noncurrent regulatory liabilities			1,279		1,132
TOTAL REGULATORY LIABILITIES		$	2,012	$	1,416

Schedule of Regulatory Assets by Region [Table Text Block]

	December 31,
	2011		2010

	(in millions)
Latin America	$	546	$	265
North America		692		417
Total regulatory assets	$	1,238	$	682

Schedule of Regulatory Liabilities by Region [Table Text Block]

	December 31,
	2011		2010

	(in millions)
Latin America	$	1,333	$	890
North America		679		526
Total regulatory liabilities	$	2,012	$	1,416

- Definition

Tabular disclosure of assets that are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet.

+ References+ Details