Variable Interest Entities (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Dec. 31, 2012
Variable Interest Entities (Textuals) [Abstract]
Securitization Bonds	$ 2,338,000,000			$ 2,338,000,000			$ 2,281,000,000
Securitized Transition Assets	2,080,000,000			2,080,000,000			2,117,000,000
Percentage Ownership of "Allegheny Series" by a Nonaffiliated Company				100.00%
Sabine Mining Co [Member]
Billings from Affiliates
Billings from VIE	41,000,000		35,000,000	125,000,000		126,000,000
Variable Interest Entities (Textuals) [Abstract]
Billings from VIE	41,000,000		35,000,000	125,000,000		126,000,000
DCC Fuel [Member]
Variable Interest Entities (Textuals) [Abstract]
Payments Made by I&M to DCC Fuel	32,000,000		23,000,000	96,000,000		82,000,000
AEP Credit, Inc. [Member]
Variable Interest Entities (Textuals) [Abstract]
Minimum Percentage of Equity AEP Provides				5.00%
Percentage of Short Term Borrowing Needs in Excess of Third Party Financings				20.00%
AEP Texas Central Transition Funding Co [Member]
Variable Interest Entities (Textuals) [Abstract]
Securitization Bonds	2,100,000,000			2,100,000,000			2,300,000,000
Securitized Transition Assets	1,900,000,000			1,900,000,000			2,100,000,000
Protected Cell Of Energy Insurance Services, Inc. [Member]
Variable Interest Entities (Textuals) [Abstract]
Insurance Premium Expense to Protected Cell	15,000,000		16,000,000	30,000,000		31,000,000
Dolet Hills Lignite Co, LLC [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	9,000,000			9,000,000			9,000,000
Maximum Exposure	54,000,000			54,000,000			58,000,000
Billings from Affiliates
Billings from VIE	21,000,000		20,000,000	53,000,000		54,000,000
Variable Interest Entities (Textuals) [Abstract]
Billings from VIE	21,000,000		20,000,000	53,000,000		54,000,000
Percentage of VIE Sales of Lignite Produced				50.00%
Percentage of DHLCs Debt Guaranteed by Each SWEPCo and CLECO				50.00%
Percentage of Management Fee Received by SWEPCo from DHLC				100.00%
PATH West Virginia Transmission Co, LLC [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	33,000,000			33,000,000			31,000,000
Maximum Exposure	33,000,000			33,000,000			31,000,000
Capital Contribution From Parent [Member] | Dolet Hills Lignite Co, LLC [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	8,000,000			8,000,000			8,000,000
Maximum Exposure	8,000,000			8,000,000			8,000,000
Capital Contribution From Parent [Member] | PATH West Virginia Transmission Co, LLC [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	19,000,000			19,000,000			19,000,000
Maximum Exposure	19,000,000			19,000,000			19,000,000
Retained Earnings [Member] | Dolet Hills Lignite Co, LLC [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	1,000,000			1,000,000			1,000,000
Maximum Exposure	1,000,000			1,000,000			1,000,000
Retained Earnings [Member] | PATH West Virginia Transmission Co, LLC [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	14,000,000			14,000,000			12,000,000
Maximum Exposure	14,000,000			14,000,000			12,000,000
SWEPCo's Guarantee Of Debt [Member] | Dolet Hills Lignite Co, LLC [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	0			0			0
Maximum Exposure	45,000,000			45,000,000			49,000,000
Current Assets [Member] | Sabine Mining Co [Member]
ASSETS
Assets	65,000,000			65,000,000			57,000,000
Current Assets [Member] | DCC Fuel [Member]
ASSETS
Assets	155,000,000			155,000,000			133,000,000
Current Assets [Member] | AEP Credit, Inc. [Member]
ASSETS
Assets	972,000,000			972,000,000			843,000,000
Current Assets [Member] | AEP Texas Central Transition Funding Co [Member]
ASSETS
Assets	197,000,000			197,000,000			250,000,000
Current Assets [Member] | Ohio Phase-In-Recovery Funding [Member]
ASSETS
Assets	12,000,000			12,000,000
Current Assets [Member] | Protected Cell Of Energy Insurance Services, Inc. [Member]
ASSETS
Assets	146,000,000			146,000,000			130,000,000
Net Property Plant And Equipment [Member] | Sabine Mining Co [Member]
ASSETS
Assets	160,000,000			160,000,000			170,000,000
Net Property Plant And Equipment [Member] | DCC Fuel [Member]
ASSETS
Assets	181,000,000			181,000,000			176,000,000
Net Property Plant And Equipment [Member] | AEP Credit, Inc. [Member]
ASSETS
Assets	0			0			0
Net Property Plant And Equipment [Member] | AEP Texas Central Transition Funding Co [Member]
ASSETS
Assets	0			0			0
Net Property Plant And Equipment [Member] | Ohio Phase-In-Recovery Funding [Member]
ASSETS
Assets	0			0
Net Property Plant And Equipment [Member] | Protected Cell Of Energy Insurance Services, Inc. [Member]
ASSETS
Assets	0			0			0
Other Non Current Assets [Member] | Sabine Mining Co [Member]
ASSETS
Assets	56,000,000			56,000,000			55,000,000
Other Non Current Assets [Member] | DCC Fuel [Member]
ASSETS
Assets	79,000,000			79,000,000			92,000,000
Other Non Current Assets [Member] | AEP Credit, Inc. [Member]
ASSETS
Assets	1,000,000			1,000,000			1,000,000
Other Non Current Assets [Member] | AEP Texas Central Transition Funding Co [Member]
ASSETS
Assets	1,989,000,000	[1]		1,989,000,000	[1]		2,167,000,000	[2]
Variable Interest Entities (Textuals) [Abstract]
Intercompany Item Eliminated in Consolidation	84,000,000			84,000,000			89,000,000
Other Non Current Assets [Member] | Ohio Phase-In-Recovery Funding [Member]
ASSETS
Assets	261,000,000	[3]		261,000,000	[3]
Other Non Current Assets [Member] | Protected Cell Of Energy Insurance Services, Inc. [Member]
ASSETS
Assets	4,000,000			4,000,000			4,000,000
Total Assets [Member] | Sabine Mining Co [Member]
ASSETS
Assets	281,000,000			281,000,000			282,000,000
Total Assets [Member] | DCC Fuel [Member]
ASSETS
Assets	415,000,000			415,000,000			401,000,000
Total Assets [Member] | AEP Credit, Inc. [Member]
ASSETS
Assets	973,000,000			973,000,000			844,000,000
Total Assets [Member] | AEP Texas Central Transition Funding Co [Member]
ASSETS
Assets	2,186,000,000			2,186,000,000			2,417,000,000
Total Assets [Member] | Ohio Phase-In-Recovery Funding [Member]
ASSETS
Assets	273,000,000			273,000,000
Total Assets [Member] | Protected Cell Of Energy Insurance Services, Inc. [Member]
ASSETS
Assets	150,000,000			150,000,000			134,000,000
Current Liabilities [Member] | Sabine Mining Co [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	32,000,000			32,000,000			32,000,000
Current Liabilities [Member] | DCC Fuel [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	139,000,000			139,000,000			121,000,000
Current Liabilities [Member] | AEP Credit, Inc. [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	856,000,000			856,000,000			800,000,000
Current Liabilities [Member] | AEP Texas Central Transition Funding Co [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	298,000,000			298,000,000			304,000,000
Current Liabilities [Member] | Ohio Phase-In-Recovery Funding [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	36,000,000			36,000,000
Current Liabilities [Member] | Protected Cell Of Energy Insurance Services, Inc. [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	46,000,000			46,000,000			43,000,000
Noncurrent Liabilities [Member] | Sabine Mining Co [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	249,000,000			249,000,000			250,000,000
Noncurrent Liabilities [Member] | DCC Fuel [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	276,000,000			276,000,000			280,000,000
Noncurrent Liabilities [Member] | AEP Credit, Inc. [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	1,000,000			1,000,000			1,000,000
Noncurrent Liabilities [Member] | AEP Texas Central Transition Funding Co [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	1,870,000,000			1,870,000,000			2,095,000,000
Noncurrent Liabilities [Member] | Ohio Phase-In-Recovery Funding [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	236,000,000			236,000,000
Noncurrent Liabilities [Member] | Protected Cell Of Energy Insurance Services, Inc. [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	70,000,000			70,000,000			66,000,000
Equity [Member] | Sabine Mining Co [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	0			0			0
Equity [Member] | DCC Fuel [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	0			0			0
Equity [Member] | AEP Credit, Inc. [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	116,000,000			116,000,000			43,000,000
Equity [Member] | AEP Texas Central Transition Funding Co [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	18,000,000			18,000,000			18,000,000
Equity [Member] | Ohio Phase-In-Recovery Funding [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	1,000,000			1,000,000
Equity [Member] | Protected Cell Of Energy Insurance Services, Inc. [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	34,000,000			34,000,000			25,000,000
Total Liabilities And Equity [Member] | Sabine Mining Co [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	281,000,000			281,000,000			282,000,000
Total Liabilities And Equity [Member] | DCC Fuel [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	415,000,000			415,000,000			401,000,000
Total Liabilities And Equity [Member] | AEP Credit, Inc. [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	973,000,000			973,000,000			844,000,000
Total Liabilities And Equity [Member] | AEP Texas Central Transition Funding Co [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	2,186,000,000			2,186,000,000			2,417,000,000
Total Liabilities And Equity [Member] | Ohio Phase-In-Recovery Funding [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	273,000,000			273,000,000
Total Liabilities And Equity [Member] | Protected Cell Of Energy Insurance Services, Inc. [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	150,000,000			150,000,000			134,000,000
Appalachian Power Co [Member] | Billings from American Electric Power Service Corporation [Member]
Billings from Affiliates
Billings from VIE	39,779,000		47,820,000	120,315,000		130,260,000
Variable Interest Entities (Textuals) [Abstract]
Billings from VIE	39,779,000		47,820,000	120,315,000		130,260,000
Appalachian Power Co [Member] | Carrying Amount in AEPSC's Accounts Payable [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	7,637,000			7,637,000			29,819,000
Maximum Exposure	7,637,000			7,637,000			29,819,000
Indiana Michigan Power Co [Member] | DCC Fuel [Member]
Variable Interest Entities (Textuals) [Abstract]
Payments Made by I&M to DCC Fuel	32,000,000		23,000,000	96,000,000		82,000,000
Indiana Michigan Power Co [Member] | Billings from AEP Generating Co [Member]
Billings from Affiliates
Billings from VIE	66,114,000		65,051,000	177,840,000		177,790,000
Variable Interest Entities (Textuals) [Abstract]
Billings from VIE	66,114,000		65,051,000	177,840,000		177,790,000
Indiana Michigan Power Co [Member] | Billings from American Electric Power Service Corporation [Member]
Billings from Affiliates
Billings from VIE	25,988,000		31,134,000	82,192,000		88,618,000
Variable Interest Entities (Textuals) [Abstract]
Billings from VIE	25,988,000		31,134,000	82,192,000		88,618,000
Indiana Michigan Power Co [Member] | Carrying Amount in AEPSC's Accounts Payable [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	6,560,000			6,560,000			17,911,000
Maximum Exposure	6,560,000			6,560,000			17,911,000
Indiana Michigan Power Co [Member] | Carrying Amount in AEGCo's Accounts Payable [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	26,323,000			26,323,000			25,498,000
Maximum Exposure	26,323,000			26,323,000			25,498,000
Indiana Michigan Power Co [Member] | Current Assets [Member] | DCC Fuel [Member]
ASSETS
Assets	155,448,000			155,448,000			132,886,000
Indiana Michigan Power Co [Member] | Net Property Plant And Equipment [Member] | DCC Fuel [Member]
ASSETS
Assets	180,541,000			180,541,000			176,065,000
Indiana Michigan Power Co [Member] | Other Non Current Assets [Member] | DCC Fuel [Member]
ASSETS
Assets	78,689,000			78,689,000			92,473,000
Indiana Michigan Power Co [Member] | Total Assets [Member] | DCC Fuel [Member]
ASSETS
Assets	414,678,000			414,678,000			401,424,000
Indiana Michigan Power Co [Member] | Current Liabilities [Member] | DCC Fuel [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	138,796,000			138,796,000			120,873,000
Indiana Michigan Power Co [Member] | Noncurrent Liabilities [Member] | DCC Fuel [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	275,882,000			275,882,000			280,551,000
Indiana Michigan Power Co [Member] | Total Liabilities And Equity [Member] | DCC Fuel [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	414,678,000			414,678,000			401,424,000
Ohio Power Co [Member]
Variable Interest Entities (Textuals) [Abstract]
Securitized Transition Assets	136,566,000			136,566,000			0
Ohio Power Co [Member] | Ohio Phase-In-Recovery Funding [Member]
Variable Interest Entities (Textuals) [Abstract]
Securitization Bonds	267,000,000			267,000,000
Securitized Transition Assets	137,000,000			137,000,000
Ohio Power Co [Member] | Billings from AEP Generating Co [Member]
Billings from Affiliates
Billings from VIE	37,255,000		46,184,000	107,876,000		149,424,000
Variable Interest Entities (Textuals) [Abstract]
Billings from VIE	37,255,000		46,184,000	107,876,000		149,424,000
Ohio Power Co [Member] | Billings from American Electric Power Service Corporation [Member]
Billings from Affiliates
Billings from VIE	58,528,000		72,751,000	169,949,000		193,686,000
Variable Interest Entities (Textuals) [Abstract]
Billings from VIE	58,528,000		72,751,000	169,949,000		193,686,000
Ohio Power Co [Member] | Carrying Amount in AEPSC's Accounts Payable [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	14,217,000			14,217,000			39,323,000
Maximum Exposure	14,217,000			14,217,000			39,323,000
Ohio Power Co [Member] | Carrying Amount in AEGCo's Accounts Payable [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	9,708,000			9,708,000			16,302,000
Maximum Exposure	9,708,000			9,708,000			16,302,000
Ohio Power Co [Member] | Current Assets [Member] | Ohio Phase-In-Recovery Funding [Member]
ASSETS
Assets	12,021,000			12,021,000
Ohio Power Co [Member] | Other Non Current Assets [Member] | Ohio Phase-In-Recovery Funding [Member]
ASSETS
Assets	261,005,000	[3]		261,005,000	[3]
Variable Interest Entities (Textuals) [Abstract]
Intercompany Item Eliminated in Consolidation	121,000,000			121,000,000
Ohio Power Co [Member] | Total Assets [Member] | Ohio Phase-In-Recovery Funding [Member]
ASSETS
Assets	273,026,000			273,026,000
Ohio Power Co [Member] | Current Liabilities [Member] | Ohio Phase-In-Recovery Funding [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	35,550,000			35,550,000
Ohio Power Co [Member] | Noncurrent Liabilities [Member] | Ohio Phase-In-Recovery Funding [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	236,139,000			236,139,000
Ohio Power Co [Member] | Equity [Member] | Ohio Phase-In-Recovery Funding [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	1,337,000			1,337,000
Ohio Power Co [Member] | Total Liabilities And Equity [Member] | Ohio Phase-In-Recovery Funding [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	273,026,000			273,026,000
Public Service Co Of Oklahoma [Member] | Billings from American Electric Power Service Corporation [Member]
Billings from Affiliates
Billings from VIE	19,535,000		21,728,000	57,504,000		60,625,000
Variable Interest Entities (Textuals) [Abstract]
Billings from VIE	19,535,000		21,728,000	57,504,000		60,625,000
Public Service Co Of Oklahoma [Member] | Carrying Amount in AEPSC's Accounts Payable [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	4,710,000			4,710,000			13,381,000
Maximum Exposure	4,710,000			4,710,000			13,381,000
Southwestern Electric Power Co [Member] | Sabine Mining Co [Member]
Billings from Affiliates
Billings from VIE	41,000,000		35,000,000	125,000,000		126,000,000
Variable Interest Entities (Textuals) [Abstract]
Billings from VIE	41,000,000		35,000,000	125,000,000		126,000,000
Southwestern Electric Power Co [Member] | Dolet Hills Lignite Co, LLC [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	8,745,000			8,745,000			8,589,000
Maximum Exposure	53,642,000			53,642,000			58,153,000
Billings from Affiliates
Billings from VIE	21,000,000		20,000,000	53,000,000		54,000,000
Variable Interest Entities (Textuals) [Abstract]
Billings from VIE	21,000,000		20,000,000	53,000,000		54,000,000
Percentage of VIE Sales of Lignite Produced				50.00%
Percentage of DHLCs Debt Guaranteed by Each SWEPCo and CLECO				50.00%
Percentage of Management Fee Received by SWEPCo from DHLC				100.00%
Southwestern Electric Power Co [Member] | Billings from American Electric Power Service Corporation [Member]
Billings from Affiliates
Billings from VIE	28,431,000		33,154,000	85,506,000		93,120,000
Variable Interest Entities (Textuals) [Abstract]
Billings from VIE	28,431,000		33,154,000	85,506,000		93,120,000
Southwestern Electric Power Co [Member] | Carrying Amount in AEPSC's Accounts Payable [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	6,778,000			6,778,000			19,669,000
Maximum Exposure	6,778,000			6,778,000			19,669,000
Southwestern Electric Power Co [Member] | Capital Contribution From Parent [Member] | Dolet Hills Lignite Co, LLC [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	7,643,000			7,643,000			7,643,000
Maximum Exposure	7,643,000			7,643,000			7,643,000
Southwestern Electric Power Co [Member] | Retained Earnings [Member] | Dolet Hills Lignite Co, LLC [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	1,102,000			1,102,000			946,000
Maximum Exposure	1,102,000			1,102,000			946,000
Southwestern Electric Power Co [Member] | SWEPCo's Guarantee Of Debt [Member] | Dolet Hills Lignite Co, LLC [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
As Reported on the Consolidated Balance Sheet	0			0			0
Maximum Exposure	44,897,000			44,897,000			49,564,000
Southwestern Electric Power Co [Member] | Current Assets [Member] | Sabine Mining Co [Member]
ASSETS
Assets	64,737,000			64,737,000			56,535,000
Southwestern Electric Power Co [Member] | Net Property Plant And Equipment [Member] | Sabine Mining Co [Member]
ASSETS
Assets	160,575,000			160,575,000			170,436,000
Southwestern Electric Power Co [Member] | Other Non Current Assets [Member] | Sabine Mining Co [Member]
ASSETS
Assets	55,760,000			55,760,000			55,076,000
Southwestern Electric Power Co [Member] | Total Assets [Member] | Sabine Mining Co [Member]
ASSETS
Assets	281,072,000			281,072,000			282,047,000
Southwestern Electric Power Co [Member] | Current Liabilities [Member] | Sabine Mining Co [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	32,005,000			32,005,000			31,446,000
Southwestern Electric Power Co [Member] | Noncurrent Liabilities [Member] | Sabine Mining Co [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	248,745,000			248,745,000			250,340,000
Southwestern Electric Power Co [Member] | Equity [Member] | Sabine Mining Co [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	322,000			322,000			261,000
Southwestern Electric Power Co [Member] | Total Liabilities And Equity [Member] | Sabine Mining Co [Member]
LIABILITIES AND EQUITY
Liabilities and Equity	$ 281,072,000			$ 281,072,000			$ 282,047,000
AEP Generating Co [Member] | Rockport Generating Plant (Unit No. 1) [Member]
Variable Interest Entities (Textuals) [Abstract]
Jointly Owned Utility Plant, Proportionate Ownership Share	50.00%			50.00%
AEP Generating Co [Member] | Rockport Generating Plant (Unit No. 2) [Member]
Variable Interest Entities (Textuals) [Abstract]
Percentage Interest in Rockport Plant Unit 2 Lease	50.00%			50.00%
AEP Generating Co [Member] | Lawrenceburg Generating Station [Member]
Variable Interest Entities (Textuals) [Abstract]
Jointly Owned Utility Plant, Proportionate Ownership Share	100.00%			100.00%
Cleco Power, LLC [Member] | Dolet Hills Lignite Co, LLC [Member]
Variable Interest Entities (Textuals) [Abstract]
Percentage of VIE Sales of Lignite Produced				50.00%

[1] Includes an intercompany item eliminated in consolidation of $84 million.

[2] Includes an intercompany item eliminated in consolidation of $89 million.

[3] Includes an intercompany item eliminated in consolidation of $121 million.