Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Schedule Of Face And Fair Value Of Debt

	December 31, 2012				December 31, 2011
	Face Value		Fair Value		Face Value			Fair Value
	(In Millions)
Fixed-rate	$	1,765.3	$	2,012.3	$	1,765.3	$	1,944.9
Variable-rate		50.0		50.0		64.0		64.0
Total indebtedness	$	1,815.3	$	2,062.3	$	1,829.3	$	2,008.9

Summary Of Fair Value Assets And Liabilities Measured On A Recurring Basis, Level 3

	Fair Value Measurements Using Level 3 at:
	December 31, 2012		December 31, 2011
	(In Thousands)
Financial assets:
Financial transmission rights	$	2,419	$	2,779
Total financial assets measured at fair value	$	2,419	$	2,779
Financial liabilities:
Other derivative liabilities	$	170	$	181
Total financial liabilities measured at fair value	$	170	$	181

Reconciliation Of Financial Instruments Classified As Level 3

	Derivative Financial Instruments, net Liability			Investments in Debt Securities		Total
	(In Thousands)
Balance at January 1, 2011	$	(7,461)	$	41,669	$	34,208
Unrealized gain recognized in OCI		-		331		331
Unrealized losses recognized in earnings		(15)		-		(15)
Unrealized loss recognized as a regulatory liability		(5,095)		-		(5,095)
Issuances		8,085		-		8,085
Settlements		7,084		(42,000)		(34,916)
Balance at December 31, 2011	$	2,598	$	-	$	2,598
Unrealized gain recognized in earnings		11		-		11
Issuances		8,832		-		8,832
Settlements		(9,192)		-		(9,192)
Balance at December 31, 2012	$	2,249	$	-	$	2,249

Indianapolis Power And Light Company [Member]

Schedule Of Face And Fair Value Of Debt

	December 31, 2012				December 31, 2011
	Face Value		Fair Value		Face Value			Fair Value
	(In Millions)
Fixed-rate	$	965.3	$	1,144.3	$	965.3	$	1,117.9
Variable-rate		50.0		50.0		64.0		64.0
Total indebtedness	$	1,015.3	$	1,194.3	$	1,029.3	$	1,181.9

Summary Of Fair Value Assets And Liabilities Measured On A Recurring Basis, Level 3

	Fair Value Measurements Using Level 3 at:
	December 31, 2012		December 31, 2011
	(In Thousands)
Financial assets:
Financial transmission rights	$	2,419	$	2,779
Total financial assets measured at fair value	$	2,419	$	2,779
Financial liabilities:
Other derivative liabilities	$	170	$	181
Total financial liabilities measured at fair value	$	170	$	181

Reconciliation Of Financial Instruments Classified As Level 3

	Derivative Financial Instruments, net Liability			Investments in Debt Securities		Total
	(In Thousands)
Balance at January 1, 2011	$	(7,461)	$	41,669	$	34,208
Unrealized gain recognized in OCI		-		331		331
Unrealized losses recognized in earnings		(15)		-		(15)
Unrealized loss recognized as a regulatory liability		(5,095)		-		(5,095)
Issuances		8,085		-		8,085
Settlements		7,084		(42,000)		(34,916)
Balance at December 31, 2011	$	2,598	$	-	$	2,598
Unrealized gain recognized in earnings		11		-		11
Issuances		8,832		-		8,832
Settlements		(9,192)		-		(9,192)
Balance at December 31, 2012	$	2,249	$	-	$	2,249