New Accounting Pronouncements	6 Months Ended
Jun. 30, 2011
Appalachian Power Co [Member]
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
New Accounting Pronouncements	2. NEW ACCOUNTING PRONOUNCEMENTS Upon issuance of final pronouncements, management reviews the new accounting literature to determine its relevance, if any, to the Registrant Subsidiaries' business. The following represents a summary of final pronouncements that impact the financial statements. Pronouncements Issued During 2011 The following standard was issued during the first six months of 2011. The following paragraphs discuss its impact on future financial statements. ASU 2011-05 “Presentation of Comprehensive Income” (ASU 2011-05) In June 2011, the FASB issued ASU 2011-05 eliminating the option to present the components of other comprehensive income as a part of the statement of shareholders' equity. The standard requires other comprehensive income be presented as part of a single continuous statement of comprehensive income or in a statement of other comprehensive income immediately following the statement of net income. Reclassification adjustments from other comprehensive income to net income must be presented on the face of the financial statements. This standard must be retrospectively applied to all reporting periods presented in financial reports issued after the effective date. The new accounting guidance is effective for interim and annual periods beginning after December 15, 2011. This standard will change the presentation of the financial statements but will not affect the calculation of net income or comprehensive income. The Registrant Subsidiaries will adopt ASU 2011-05 effective January 1, 2012.
Columbus Southern Power Co [Member]
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
New Accounting Pronouncements	2. NEW ACCOUNTING PRONOUNCEMENTS Upon issuance of final pronouncements, management reviews the new accounting literature to determine its relevance, if any, to the Registrant Subsidiaries' business. The following represents a summary of final pronouncements that impact the financial statements. Pronouncements Issued During 2011 The following standard was issued during the first six months of 2011. The following paragraphs discuss its impact on future financial statements. ASU 2011-05 “Presentation of Comprehensive Income” (ASU 2011-05) In June 2011, the FASB issued ASU 2011-05 eliminating the option to present the components of other comprehensive income as a part of the statement of shareholders' equity. The standard requires other comprehensive income be presented as part of a single continuous statement of comprehensive income or in a statement of other comprehensive income immediately following the statement of net income. Reclassification adjustments from other comprehensive income to net income must be presented on the face of the financial statements. This standard must be retrospectively applied to all reporting periods presented in financial reports issued after the effective date. The new accounting guidance is effective for interim and annual periods beginning after December 15, 2011. This standard will change the presentation of the financial statements but will not affect the calculation of net income or comprehensive income. The Registrant Subsidiaries will adopt ASU 2011-05 effective January 1, 2012.
Indiana Michigan Power Co [Member]
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
New Accounting Pronouncements	2. NEW ACCOUNTING PRONOUNCEMENTS Upon issuance of final pronouncements, management reviews the new accounting literature to determine its relevance, if any, to the Registrant Subsidiaries' business. The following represents a summary of final pronouncements that impact the financial statements. Pronouncements Issued During 2011 The following standard was issued during the first six months of 2011. The following paragraphs discuss its impact on future financial statements. ASU 2011-05 “Presentation of Comprehensive Income” (ASU 2011-05) In June 2011, the FASB issued ASU 2011-05 eliminating the option to present the components of other comprehensive income as a part of the statement of shareholders' equity. The standard requires other comprehensive income be presented as part of a single continuous statement of comprehensive income or in a statement of other comprehensive income immediately following the statement of net income. Reclassification adjustments from other comprehensive income to net income must be presented on the face of the financial statements. This standard must be retrospectively applied to all reporting periods presented in financial reports issued after the effective date. The new accounting guidance is effective for interim and annual periods beginning after December 15, 2011. This standard will change the presentation of the financial statements but will not affect the calculation of net income or comprehensive income. The Registrant Subsidiaries will adopt ASU 2011-05 effective January 1, 2012.
Ohio Power Co [Member]
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
New Accounting Pronouncements	2. NEW ACCOUNTING PRONOUNCEMENTS Upon issuance of final pronouncements, management reviews the new accounting literature to determine its relevance, if any, to the Registrant Subsidiaries' business. The following represents a summary of final pronouncements that impact the financial statements. Pronouncements Issued During 2011 The following standard was issued during the first six months of 2011. The following paragraphs discuss its impact on future financial statements. ASU 2011-05 “Presentation of Comprehensive Income” (ASU 2011-05) In June 2011, the FASB issued ASU 2011-05 eliminating the option to present the components of other comprehensive income as a part of the statement of shareholders' equity. The standard requires other comprehensive income be presented as part of a single continuous statement of comprehensive income or in a statement of other comprehensive income immediately following the statement of net income. Reclassification adjustments from other comprehensive income to net income must be presented on the face of the financial statements. This standard must be retrospectively applied to all reporting periods presented in financial reports issued after the effective date. The new accounting guidance is effective for interim and annual periods beginning after December 15, 2011. This standard will change the presentation of the financial statements but will not affect the calculation of net income or comprehensive income. The Registrant Subsidiaries will adopt ASU 2011-05 effective January 1, 2012.
Public Service Co Of Oklahoma [Member]
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
New Accounting Pronouncements	2. NEW ACCOUNTING PRONOUNCEMENTS Upon issuance of final pronouncements, management reviews the new accounting literature to determine its relevance, if any, to the Registrant Subsidiaries' business. The following represents a summary of final pronouncements that impact the financial statements. Pronouncements Issued During 2011 The following standard was issued during the first six months of 2011. The following paragraphs discuss its impact on future financial statements. ASU 2011-05 “Presentation of Comprehensive Income” (ASU 2011-05) In June 2011, the FASB issued ASU 2011-05 eliminating the option to present the components of other comprehensive income as a part of the statement of shareholders' equity. The standard requires other comprehensive income be presented as part of a single continuous statement of comprehensive income or in a statement of other comprehensive income immediately following the statement of net income. Reclassification adjustments from other comprehensive income to net income must be presented on the face of the financial statements. This standard must be retrospectively applied to all reporting periods presented in financial reports issued after the effective date. The new accounting guidance is effective for interim and annual periods beginning after December 15, 2011. This standard will change the presentation of the financial statements but will not affect the calculation of net income or comprehensive income. The Registrant Subsidiaries will adopt ASU 2011-05 effective January 1, 2012.
Southwestern Electric Power Co [Member]
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
New Accounting Pronouncements	2. NEW ACCOUNTING PRONOUNCEMENTS Upon issuance of final pronouncements, management reviews the new accounting literature to determine its relevance, if any, to the Registrant Subsidiaries' business. The following represents a summary of final pronouncements that impact the financial statements. Pronouncements Issued During 2011 The following standard was issued during the first six months of 2011. The following paragraphs discuss its impact on future financial statements. ASU 2011-05 “Presentation of Comprehensive Income” (ASU 2011-05) In June 2011, the FASB issued ASU 2011-05 eliminating the option to present the components of other comprehensive income as a part of the statement of shareholders' equity. The standard requires other comprehensive income be presented as part of a single continuous statement of comprehensive income or in a statement of other comprehensive income immediately following the statement of net income. Reclassification adjustments from other comprehensive income to net income must be presented on the face of the financial statements. This standard must be retrospectively applied to all reporting periods presented in financial reports issued after the effective date. The new accounting guidance is effective for interim and annual periods beginning after December 15, 2011. This standard will change the presentation of the financial statements but will not affect the calculation of net income or comprehensive income. The Registrant Subsidiaries will adopt ASU 2011-05 effective January 1, 2012.

New Accounting Pronouncements

6 Months Ended

Jun. 30, 2011

Appalachian Power Co [Member]

New Accounting Pronouncements And Changes In Accounting Principles [Abstract]

2. NEW ACCOUNTING PRONOUNCEMENTS

Upon issuance of final pronouncements, management reviews the new accounting literature to determine its relevance, if any, to the Registrant Subsidiaries' business. The following represents a summary of final pronouncements that impact the financial statements.

Pronouncements Issued During 2011

The following standard was issued during the first six months of 2011. The following paragraphs discuss its impact on future financial statements.

ASU 2011-05 “Presentation of Comprehensive Income” (ASU 2011-05)

In June 2011, the FASB issued ASU 2011-05 eliminating the option to present the components of other comprehensive income as a part of the statement of shareholders' equity. The standard requires other comprehensive income be presented as part of a single continuous statement of comprehensive income or in a statement of other comprehensive income immediately following the statement of net income. Reclassification adjustments from other comprehensive income to net income must be presented on the face of the financial statements. This standard must be retrospectively applied to all reporting periods presented in financial reports issued after the effective date.

The new accounting guidance is effective for interim and annual periods beginning after December 15, 2011. This standard will change the presentation of the financial statements but will not affect the calculation of net income or comprehensive income. The Registrant Subsidiaries will adopt ASU 2011-05 effective January 1, 2012.

Columbus Southern Power Co [Member]

New Accounting Pronouncements And Changes In Accounting Principles [Abstract]

New Accounting Pronouncements

2. NEW ACCOUNTING PRONOUNCEMENTS

Pronouncements Issued During 2011

The following standard was issued during the first six months of 2011. The following paragraphs discuss its impact on future financial statements.

ASU 2011-05 “Presentation of Comprehensive Income” (ASU 2011-05)

Indiana Michigan Power Co [Member]

New Accounting Pronouncements And Changes In Accounting Principles [Abstract]

New Accounting Pronouncements

2. NEW ACCOUNTING PRONOUNCEMENTS

Pronouncements Issued During 2011

The following standard was issued during the first six months of 2011. The following paragraphs discuss its impact on future financial statements.

ASU 2011-05 “Presentation of Comprehensive Income” (ASU 2011-05)

Ohio Power Co [Member]

New Accounting Pronouncements And Changes In Accounting Principles [Abstract]

New Accounting Pronouncements

2. NEW ACCOUNTING PRONOUNCEMENTS

Pronouncements Issued During 2011

The following standard was issued during the first six months of 2011. The following paragraphs discuss its impact on future financial statements.

ASU 2011-05 “Presentation of Comprehensive Income” (ASU 2011-05)

Public Service Co Of Oklahoma [Member]

New Accounting Pronouncements And Changes In Accounting Principles [Abstract]

New Accounting Pronouncements

2. NEW ACCOUNTING PRONOUNCEMENTS

Pronouncements Issued During 2011

The following standard was issued during the first six months of 2011. The following paragraphs discuss its impact on future financial statements.

ASU 2011-05 “Presentation of Comprehensive Income” (ASU 2011-05)

Southwestern Electric Power Co [Member]

New Accounting Pronouncements And Changes In Accounting Principles [Abstract]

New Accounting Pronouncements

2. NEW ACCOUNTING PRONOUNCEMENTS

Pronouncements Issued During 2011

The following standard was issued during the first six months of 2011. The following paragraphs discuss its impact on future financial statements.

ASU 2011-05 “Presentation of Comprehensive Income” (ASU 2011-05)

- Definition

Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Accounting Change
-URI http://asc.fasb.org/extlink&oid=6503790

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22583-107794

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 28
-Paragraph 23, 24
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.10-01.(b)(6))
-URI http://asc.fasb.org/extlink&oid=6958853&loc=d3e46468-122699

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 01
-Paragraph b
-Subparagraph 6
-Article 10

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Direct Effects of a Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6510796

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 154
-Paragraph 2, 17, 18
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6507316

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Retrospective Application
-URI http://asc.fasb.org/extlink&oid=6523989

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22580-107794

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22499-107794

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Indirect Effects of a Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6515603

+ Details