Fair Value (Tables)

12 Months Ended

Dec. 31, 2017

Entity Information [Line Items]

Summary of Fair Value Assets and Liabilities Measured on a Recurring Basis, Level 3

The fair value of assets and liabilities at December 31, 2017 measured on a recurring basis and the respective category within the fair value hierarchy for IPALCO was determined as follows:

Assets and Liabilities at Fair Value
			Level 1		Level 2		Level 3
	Fair value at December 31, 2017		Based on quoted market prices in active markets		Other observable inputs		Unobservable inputs
	(In Thousands)
Financial assets:
Financial transmission rights	$	2,532	$	—	$	—	$	2,532
Total financial assets measured at fair value	$	2,532	$	—	$	—	$	2,532
Financial liabilities:
Other derivative liabilities	$	78	$	—	$	—	$	78
Total financial liabilities measured at fair value	$	78	$	—	$	—	$	78

The fair value of assets and liabilities at December 31, 2016 measured on a recurring basis and the respective category within the fair value hierarchy for IPALCO was determined as follows:

Assets and Liabilities at Fair Value
			Level 1		Level 2		Level 3
	Fair value at December 31, 2016		Based on quoted market prices in active markets		Other observable inputs		Unobservable inputs
	(In Thousands)
Financial assets:
Financial transmission rights	$	4,393	$	—	$	—	$	4,393
Total financial assets measured at fair value	$	4,393	$	—	$	—	$	4,393
Financial liabilities:
Other derivative liabilities	$	100	$	—	$	—	$	100
Total financial liabilities measured at fair value	$	100	$	—	$	—	$	100

Reconciliation of Financial Instruments Classified as Level 3

The following table sets forth a reconciliation of financial instruments, measured at fair value on a recurring basis, classified as Level 3 in the fair value hierarchy (note, amounts in this table indicate carrying values, which approximate fair values):

	Derivative Financial  Instruments, net Liability
	(In Thousands)
Balance at January 1, 2016	$	4,029
Unrealized gain recognized in earnings	46
Issuances	10,892
Settlements	(10,674		)
Balance at December 31, 2016	4,293
Unrealized gain recognized in earnings	23
Issuances	9,647
Settlements	(11,509		)
Balance at December 31, 2017	$	2,454

Schedule of Face and Fair Value of Debt

The following table shows the face value and the fair value of fixed-rate and variable-rate indebtedness (Level 2) for the periods ending:

	December 31, 2017				December 31, 2016
	Face Value		Fair Value		Face Value		Fair Value
	(In Millions)
Fixed-rate	$	2,418.8	$	2,655.0	$	2,438.5	$	2,543.5
Variable-rate	238.0		238.0		140.0		140.0
Total indebtedness	$	2,656.8	$	2,893.0	$	2,578.5	$	2,683.5

Indianapolis Power And Light Company [Member]

Entity Information [Line Items]

Summary of Fair Value Assets and Liabilities Measured on a Recurring Basis, Level 3

The fair value of assets and liabilities at December 31, 2017 measured on a recurring basis and the respective category within the fair value hierarchy for IPL was determined as follows:

Assets and Liabilities at Fair Value
			Level 1		Level 2		Level 3
	Fair value at December 31, 2017		Based on quoted market prices in active markets		Other observable inputs		Unobservable inputs
	(In Thousands)
Financial assets:
Financial transmission rights	$	2,532	$	—	$	—	$	2,532
Total financial assets measured at fair value	$	2,532	$	—	$	—	$	2,532
Financial liabilities:
Other derivative liabilities	$	78	$	—	$	—	$	78
Total financial liabilities measured at fair value	$	78	$	—	$	—	$	78

The fair value of assets and liabilities at December 31, 2016 measured on a recurring basis and the respective category within the fair value hierarchy for IPL was determined as follows:

Assets and Liabilities at Fair Value
			Level 1		Level 2		Level 3
	Fair value at December 31, 2016		Based on quoted market prices in active markets		Other observable inputs		Unobservable inputs
	(In Thousands)
Financial assets:
Financial transmission rights	$	4,393	$	—	$	—	$	4,393
Total financial assets measured at fair value	$	4,393	$	—	$	—	$	4,393
Financial liabilities:
Other derivative liabilities	$	100	$	—	$	—	$	100
Total financial liabilities measured at fair value	$	100	$	—	$	—	$	100

Reconciliation of Financial Instruments Classified as Level 3

The following table sets forth a reconciliation of financial instruments, measured at fair value on a recurring basis, classified as Level 3 in the fair value hierarchy (note, amounts in this table indicate carrying values, which approximate fair values):

	Derivative Financial  Instruments, net Liability
	(In Thousands)
Balance at January 1, 2016	$	4,029
Unrealized gain recognized in earnings	46
Issuances	10,892
Settlements	(10,674		)
Balance at December 31, 2016	4,293
Unrealized gain recognized in earnings	23
Issuances	9,647
Settlements	(11,509		)
Balance at December 31, 2017	$	2,454

Schedule of Face and Fair Value of Debt

The following table shows the face value and the fair value of fixed-rate and variable-rate indebtedness (Level 2) for the periods ending: 

	December 31, 2017				December 31, 2016
	Face Value		Fair Value		Face Value		Fair Value
	(In Millions)
Fixed-rate	$	1,608.8	$	1,837.8	$	1,633.5	$	1,717.2
Variable-rate	238.0		238.0		140.0		140.0
Total indebtedness	$	1,846.8	$	2,075.8	$	1,773.5	$	1,857.2