New Accounting Standards	9 Months Ended
Sep. 30, 2012
Schedule Of New Accounting Pronouncements And Changes In Accounting Principles Disclosure [Line Items]
Description Of New Accounting Pronouncements [Text Block]	16. NEW ACCOUNTING STANDARDS The following new accounting standards were adopted by the Progress Energy Registrants subsequent to September 30, 2011 and the impact of such adoption, if applicable, has been presented in the respective Consolidated Financial Statements of the Progress Energy Registrants: ASC 220 — Comprehensive Income. In June 2011, the FASB amended the existing requirements for presenting comprehensive income in financial statements primarily to increase the prominence of items reported in other comprehensive income (OCI) and to facilitate the convergence of U.S. GAAP and International Financial Reporting Standards (IFRS). Specifically, the revised guidance eliminates the option previously provided to present components of OCI as part of the statement of changes in stockholders' equity. Accordingly, all non-owner changes in stockholders' equity are required to be presented either in a single continuous statement of comprehensive income or in two separate but consecutive financial statements. For the Progress Energy Registrants, this revised guidance was effective on a retrospective basis for interim and annual periods beginning January 1, 2012. The adoption of this standard changed the presentation of the Progress Energy Registrants' financial statements but did not affect the calculation of net income, comprehensive income or earnings per share. ASC 820 — Fair Value Measurements and Disclosures. In May 2011, the FASB amended existing requirements for measuring fair value and for disclosing information about fair value measurements. This revised guidance results in a consistent definition of fair value, as well as common requirements for measurement and disclosure of fair value information between U.S. GAAP and IFRS. In addition, the amendments set forth enhanced disclosure requirements with respect to recurring Level 3 measurements, nonfinancial assets measured or disclosed at fair value, transfers between levels in the fair value hierarchy, and assets and liabilities disclosed but not recorded at fair value. For the Progress Energy Registrants, the revised fair value measurement guidance was effective on a prospective basis for interim and annual periods beginning January 1, 2012. The adoption of this new guidance did not have a significant impact on the Progress Energy Registrants' disclosures or their consolidated results of operations, cash flows, or financial position. ASC 350 — Intangibles–Goodwill and Other. In September 2011, the FASB amended existing goodwill impairment testing accounting guidance to provide an entity testing goodwill for impairment with the option of performing a qualitative assessment prior to calculating the fair value of a reporting unit in step one of a goodwill impairment test. Under this revised guidance, a qualitative assessment would require an evaluation of economic, industry, and company-specific considerations. If an entity determines, on a basis of such qualitative factors, that the fair value of a reporting unit is more likely than not less than the carrying value of a reporting unit, then step one and if necessary, step two of the impairment test must be performed. Otherwise, no further impairment testing would be required. The revised goodwill impairment testing accounting guidance was effective for the Progress Energy Registrants' annual and interim goodwill impairment tests performed for fiscal years beginning January 1, 2012. The adoption of this new guidance did not have a significant impact on the Progress Energy Registrants' disclosures or their consolidated results of operations, cash flows, or financial position. The following new Accounting Standards Update (ASU) has been issued, but has not yet been adopted by the Progress Energy Registrants, as of September 30, 2012. ASC 210 — Balance Sheet. In December 2011, the FASB issued revised accounting guidance to amend the existing disclosure requirements for offsetting financial assets and liabilities to enhance current disclosures, as well as to improve comparability of balance sheets prepared under U.S. GAAP and IFRS. The revised disclosure guidance affects all companies that have financial instruments and derivative instruments that are either offset in the balance sheet (i.e., presented on a net basis) or subject to an enforceable master netting arrangement and/or similar agreement. The revised guidance requires that certain enhanced quantitative and qualitative disclosures be made with respect to a company's netting arrangements and/or rights of setoff associated with its financial instruments and/or derivative instruments including associated collateral. For the Progress Energy Registrants, the revised disclosure guidance is effective on a retrospective basis for interim and annual periods beginning January 1, 2013. Other than additional disclosures, this revised guidance does not impact the consolidated results of operations, cash flows or financial position of Progress Energy.

New Accounting Standards

9 Months Ended

Sep. 30, 2012

Schedule Of New Accounting Pronouncements And Changes In Accounting Principles Disclosure [Line Items]

Description Of New Accounting Pronouncements [Text Block]

16. NEW ACCOUNTING STANDARDS

The following new accounting standards were adopted by the Progress Energy Registrants subsequent to September 30, 2011 and the impact of such adoption, if applicable, has been presented in the respective Consolidated Financial Statements of the Progress Energy Registrants:

ASC 220 — Comprehensive Income. In June 2011, the FASB amended the existing requirements for presenting comprehensive income in financial statements primarily to increase the prominence of items reported in other comprehensive income (OCI) and to facilitate the convergence of U.S. GAAP and International Financial Reporting Standards (IFRS). Specifically, the revised guidance eliminates the option previously provided to present components of OCI as part of the statement of changes in stockholders' equity. Accordingly, all non-owner changes in stockholders' equity are required to be presented either in a single continuous statement of comprehensive income or in two separate but consecutive financial statements. For the Progress Energy Registrants, this revised guidance was effective on a retrospective basis for interim and annual periods beginning January 1, 2012. The adoption of this standard changed the presentation of the Progress Energy Registrants' financial statements but did not affect the calculation of net income, comprehensive income or earnings per share.

ASC 820 — Fair Value Measurements and Disclosures. In May 2011, the FASB amended existing requirements for measuring fair value and for disclosing information about fair value measurements. This revised guidance results in a consistent definition of fair value, as well as common requirements for measurement and disclosure of fair value information between U.S. GAAP and IFRS. In addition, the amendments set forth enhanced disclosure requirements with respect to recurring Level 3 measurements, nonfinancial assets measured or disclosed at fair value, transfers between levels in the fair value hierarchy, and assets and liabilities disclosed but not recorded at fair value. For the Progress Energy Registrants, the revised fair value measurement guidance was effective on a prospective basis for interim and annual periods beginning January 1, 2012. The adoption of this new guidance did not have a significant impact on the Progress Energy Registrants' disclosures or their consolidated results of operations, cash flows, or financial position.

ASC 350 — Intangibles–Goodwill and Other. In September 2011, the FASB amended existing goodwill impairment testing accounting guidance to provide an entity testing goodwill for impairment with the option of performing a qualitative assessment prior to calculating the fair value of a reporting unit in step one of a goodwill impairment test. Under this revised guidance, a qualitative assessment would require an evaluation of economic, industry, and company-specific considerations. If an entity determines, on a basis of such qualitative factors, that the fair value of a reporting unit is more likely than not less than the carrying value of a reporting unit, then step one and if necessary, step two of the impairment test must be performed. Otherwise, no further impairment testing would be required. The revised goodwill impairment testing accounting guidance was effective for the Progress Energy Registrants' annual and interim goodwill impairment tests performed for fiscal years beginning January 1, 2012. The adoption of this new guidance did not have a significant impact on the Progress Energy Registrants' disclosures or their consolidated results of operations, cash flows, or financial position.

The following new Accounting Standards Update (ASU) has been issued, but has not yet been adopted by the Progress Energy Registrants, as of September 30, 2012.

ASC 210 — Balance Sheet. In December 2011, the FASB issued revised accounting guidance to amend the existing disclosure requirements for offsetting financial assets and liabilities to enhance current disclosures, as well as to improve comparability of balance sheets prepared under U.S. GAAP and IFRS. The revised disclosure guidance affects all companies that have financial instruments and derivative instruments that are either offset in the balance sheet (i.e., presented on a net basis) or subject to an enforceable master netting arrangement and/or similar agreement. The revised guidance requires that certain enhanced quantitative and qualitative disclosures be made with respect to a company's netting arrangements and/or rights of setoff associated with its financial instruments and/or derivative instruments including associated collateral. For the Progress Energy Registrants, the revised disclosure guidance is effective on a retrospective basis for interim and annual periods beginning January 1, 2013. Other than additional disclosures, this revised guidance does not impact the consolidated results of operations, cash flows or financial position of Progress Energy.