Summary of Significant Accounting and Reporting Policies	9 Months Ended
Sep. 30, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting and Reporting Policies	Summary of Significant Accounting and Reporting Policies NextEra Energy Partners, LP - In February and March 2016, NEP completed the sale of 11,155,000 common units representing limited partnership interests in NEP in a public offering for an aggregate purchase price of approximately $287 million, or $25.76 per common unit. In September 2016, NEP completed the sale of 11,962,300 common units representing limited partnership interests in NEP in a public offering for an aggregate purchase price of approximately $342 million, or $28.56 per common unit. These offerings, together with issuances of additional common units under NEP's at-the-market equity issuance program during the nine months ended September 30, 2016, resulted in a decrease of NEE’s interest in NEP's operating projects to approximately 65.2% at September 30, 2016. Leases - In February 2016, the FASB issued an accounting standards update which requires, among other things, that lessees recognize a lease liability, initially measured at the present value of the future lease payments; and a right-of-use asset for all leases (with the exception of short-term leases). The standards update will be effective for NEE and FPL beginning January 1, 2019. Early adoption is permitted. Lessees and lessors must apply a modified retrospective approach for all leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. NEE and FPL are currently evaluating the effect the adoption of this standards update will have on their consolidated financial statements. Assets and Liabilities Associated with Assets Held for Sale - In April 2016, a subsidiary of NEER completed the sale of the Texas natural gas generation facilities for net cash proceeds of approximately $456 million, after transaction costs and working capital adjustments. A NEER affiliate continued to operate the facilities included in the sale through September 2016. In connection with the sale and the related consolidating state income tax effects, a gain of approximately $254 million ($106 million after tax) was recorded in NEE's condensed consolidated statements of income for the nine months ended September 30, 2016 and is included in taxes other than income taxes and other - net. The carrying amounts of the major classes of assets and liabilities related to the facilities that were classified as held for sale on NEE's condensed consolidated balance sheet as of December 31, 2015 primarily represent property, plant and equipment and the related long-term debt. In May 2016, NEER initiated a plan and received internal authorization to pursue the sale of its ownership interests in its natural gas generation facilities located primarily in Pennsylvania, which have a total generating capacity of 840 MW at September 30, 2016, and subsequently entered into an agreement to sell its ownership interests in these natural gas generation facilities. The transaction is expected to close in the fourth quarter of 2016, pending the satisfaction of customary closing conditions. The carrying amounts of the major classes of assets and liabilities related to the facilities that were classified as held for sale on NEE's condensed consolidated balance sheet as of September 30, 2016 primarily represent property, plant and equipment and the related long-term debt. Merger Termination - On July 15, 2016, the Hawaii Public Utilities Commission issued an order dismissing NEE's and Hawaiian Electric Company, Inc.'s (HECO) merger application. As a result, on July 16, 2016, NEE terminated the agreement and plan of merger dated as of December 3, 2014 (merger agreement), by and among NEE, Hawaiian Electric Industries, Inc. (HEI), and two wholly owned direct subsidiaries of NEE, NEE Acquisition Sub I, LLC and NEE Acquisition Sub II, Inc., under which HECO, a wholly owned subsidiary of HEI, was to become a subsidiary of NEE. Pursuant to the terms of the merger agreement, NEE paid HEI a termination fee of $90 million plus reimbursement to HEI for out-of-pocket expenses incurred in connection with the merger agreement of $5 million, which was included in merger-related expenses in NEE's condensed consolidated statements of income for the three and nine months ended September 30, 2016. Proposed Oncor-Related Transactions - On July 29, 2016, NEE, EFH Merger Co., LLC (Merger Sub), a direct wholly owned subsidiary of NEE, Energy Future Holdings Corp. (EFH Corp.) and Energy Future Intermediate Holding Company LLC (EFIH), a direct wholly owned subsidiary of EFH Corp., entered into an agreement and plan of merger (merger agreement). Pursuant to the merger agreement and after the reorganization of EFH Corp. (reorganized EFH) under the United States Bankruptcy Code, Merger Sub will acquire 100% of the equity of reorganized EFH Corp. and certain of its direct and indirect subsidiaries, including its indirect ownership of 80.03% of the outstanding equity interests of Oncor Electric Delivery Company LLC (Oncor), a regulated electric distribution and transmission business that operates the largest distribution and transmission system in Texas. The merger agreement, as amended in September 2016, provides that the consideration for the transaction funded by NEE will be $9.796 billion, which will be paid to certain creditors primarily in cash, with the remainder in shares of NEE common stock, which will be paid to certain creditors. The amount of consideration will be subject to adjustment as provided in the merger agreement. Completion of the merger and the actual closing date remain subject to, among other things, confirmation from the United States Bankruptcy Court for the District of Delaware, as well as approvals by the Public Utility Commission of Texas (PUCT) and the FERC. NEE, Merger Sub, EFH Corp. and EFIH have certain specified termination rights under the merger agreement. On October 31, 2016, NEE and Oncor filed a joint application with the PUCT requesting the approval of the EFH Corp. merger, as well as the TTHC merger described below. NEE expects the EFH Corp. merger to be completed in the first half of 2017. On October 30, 2016, NEE and its direct wholly owned subsidiary WSS Acquisition Company (TTHC Merger Sub) entered into an agreement (TTHC merger agreement) with Texas Transmission Holdings Corporation (TTHC) and certain stockholders of TTHC, Cheyne Walk Investment Pte Ltd, Borealis Power Holdings Inc. and BPC Health Corporation (together, the Primary Holders). Pursuant to the TTHC merger agreement, TTHC Merger Sub would merge with TTHC for a total cash merger consideration to be paid by NEE of approximately $2.410 billion, subject to adjustment as provided in the TTHC merger agreement. TTHC, through Texas Transmission Investment LLC (TTI), a wholly owned subsidiary, owns an approximately 20% interest in Oncor. Completion of the TTHC merger and actual closing date remain subject to, among other things, approvals by the PUCT and the FERC. NEE, TTHC Merger Sub, TTHC and the Primary Holders have certain specified termination rights under the TTHC merger agreement. NEE expects the TTHC transaction to be completed in the first half of 2017. On October 29, 2016, T & D Equity Acquisition, LLC (OMI purchaser), a wholly owned subsidiary of NEE, Oncor Management Investment LLC (OMI) and Oncor entered into an agreement for the OMI purchaser to purchase OMI's 0.22% interest in Oncor for approximately $27 million. This transaction is subject to NEE closing on its agreement to acquire EFH Corp. described above. NEE expects the OMI transaction to be completed in the first half of 2017. The TTHC and OMI transactions, when combined with NEE’s agreement to acquire EFH Corp. described above, if approved, would result in NEE owning 100% of Oncor. Proposed Sale Transaction - On November 1, 2016, FN Investments, LLC (FiberNet seller), an indirect wholly owned subsidiary of NEE, and CC FN Holdings LLC (FiberNet purchaser), a wholly owned subsidiary of Crown Castle International Corp., entered into an agreement whereby the FiberNet purchaser will acquire from the FiberNet seller all of the outstanding membership interests in FPL TEL, LLC, FPL FiberNet Holdings, LLC and NextEra FiberNet, LLC (together, FiberNet), which are wholly owned subsidiaries of NEE that provide fiber-optic network services, for a cash purchase price of $1.5 billion, subject to certain adjustments. NEE expects to use a portion of the proceeds to retire approximately $370 million principal amount of FiberNet long-term debt. FiberNet’s total assets and liabilities and its results of operations are not material to NEE. The transaction is subject to, among other things, approval by the Federal Communications Commission and the public service commissions of Georgia, Louisiana and Texas. NEE expects the transaction to close in the first half of 2017.

Summary of Significant Accounting and Reporting Policies

NextEra Energy Partners, LP - In February and March 2016, NEP completed the sale of 11,155,000 common units representing limited partnership interests in NEP in a public offering for an aggregate purchase price of approximately $287 million, or $25.76 per common unit. In September 2016, NEP completed the sale of 11,962,300 common units representing limited partnership interests in NEP in a public offering for an aggregate purchase price of approximately $342 million, or $28.56 per common unit. These offerings, together with issuances of additional common units under NEP's at-the-market equity issuance program during the nine months ended September 30, 2016, resulted in a decrease of NEE’s interest in NEP's operating projects to approximately 65.2% at September 30, 2016.

Leases - In February 2016, the FASB issued an accounting standards update which requires, among other things, that lessees recognize a lease liability, initially measured at the present value of the future lease payments; and a right-of-use asset for all leases (with the exception of short-term leases). The standards update will be effective for NEE and FPL beginning January 1, 2019. Early adoption is permitted. Lessees and lessors must apply a modified retrospective approach for all leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. NEE and FPL are currently evaluating the effect the adoption of this standards update will have on their consolidated financial statements.

Assets and Liabilities Associated with Assets Held for Sale - In April 2016, a subsidiary of NEER completed the sale of the Texas natural gas generation facilities for net cash proceeds of approximately $456 million, after transaction costs and working capital adjustments. A NEER affiliate continued to operate the facilities included in the sale through September 2016. In connection with the sale and the related consolidating state income tax effects, a gain of approximately $254 million ($106 million after tax) was recorded in NEE's condensed consolidated statements of income for the nine months ended September 30, 2016 and is included in taxes other than income taxes and other - net. The carrying amounts of the major classes of assets and liabilities related to the facilities that were classified as held for sale on NEE's condensed consolidated balance sheet as of December 31, 2015 primarily represent property, plant and equipment and the related long-term debt.

In May 2016, NEER initiated a plan and received internal authorization to pursue the sale of its ownership interests in its natural gas generation facilities located primarily in Pennsylvania, which have a total generating capacity of 840 MW at September 30, 2016, and subsequently entered into an agreement to sell its ownership interests in these natural gas generation facilities. The transaction is expected to close in the fourth quarter of 2016, pending the satisfaction of customary closing conditions. The carrying amounts of the major classes of assets and liabilities related to the facilities that were classified as held for sale on NEE's condensed consolidated balance sheet as of September 30, 2016 primarily represent property, plant and equipment and the related long-term debt.

Merger Termination - On July 15, 2016, the Hawaii Public Utilities Commission issued an order dismissing NEE's and Hawaiian Electric Company, Inc.'s (HECO) merger application. As a result, on July 16, 2016, NEE terminated the agreement and plan of merger dated as of December 3, 2014 (merger agreement), by and among NEE, Hawaiian Electric Industries, Inc. (HEI), and two wholly owned direct subsidiaries of NEE, NEE Acquisition Sub I, LLC and NEE Acquisition Sub II, Inc., under which HECO, a wholly owned subsidiary of HEI, was to become a subsidiary of NEE. Pursuant to the terms of the merger agreement, NEE paid HEI a termination fee of $90 million plus reimbursement to HEI for out-of-pocket expenses incurred in connection with the merger agreement of $5 million, which was included in merger-related expenses in NEE's condensed consolidated statements of income for the three and nine months ended September 30, 2016.

Proposed Oncor-Related Transactions - On July 29, 2016, NEE, EFH Merger Co., LLC (Merger Sub), a direct wholly owned subsidiary of NEE, Energy Future Holdings Corp. (EFH Corp.) and Energy Future Intermediate Holding Company LLC (EFIH), a direct wholly owned subsidiary of EFH Corp., entered into an agreement and plan of merger (merger agreement). Pursuant to the merger agreement and after the reorganization of EFH Corp. (reorganized EFH) under the United States Bankruptcy Code, Merger Sub will acquire 100% of the equity of reorganized EFH Corp. and certain of its direct and indirect subsidiaries, including its indirect ownership of 80.03% of the outstanding equity interests of Oncor Electric Delivery Company LLC (Oncor), a regulated electric distribution and transmission business that operates the largest distribution and transmission system in Texas. The merger agreement, as amended in September 2016, provides that the consideration for the transaction funded by NEE will be $9.796 billion, which will be paid to certain creditors primarily in cash, with the remainder in shares of NEE common stock, which will be paid to certain creditors. The amount of consideration will be subject to adjustment as provided in the merger agreement. Completion of the merger and the actual closing date remain subject to, among other things, confirmation from the United States Bankruptcy Court for the District of Delaware, as well as approvals by the Public Utility Commission of Texas (PUCT) and the FERC. NEE, Merger Sub, EFH Corp. and EFIH have certain specified termination rights under the merger agreement. On October 31, 2016, NEE and Oncor filed a joint application with the PUCT requesting the approval of the EFH Corp. merger, as well as the TTHC merger described below. NEE expects the EFH Corp. merger to be completed in the first half of 2017.

On October 30, 2016, NEE and its direct wholly owned subsidiary WSS Acquisition Company (TTHC Merger Sub) entered into an agreement (TTHC merger agreement) with Texas Transmission Holdings Corporation (TTHC) and certain stockholders of TTHC, Cheyne Walk Investment Pte Ltd, Borealis Power Holdings Inc. and BPC Health Corporation (together, the Primary Holders). Pursuant to the TTHC merger agreement, TTHC Merger Sub would merge with TTHC for a total cash merger consideration to be paid by NEE of approximately $2.410 billion, subject to adjustment as provided in the TTHC merger agreement. TTHC, through Texas Transmission Investment LLC (TTI), a wholly owned subsidiary, owns an approximately 20% interest in Oncor. Completion of the TTHC merger and actual closing date remain subject to, among other things, approvals by the PUCT and the FERC. NEE, TTHC Merger Sub, TTHC and the Primary Holders have certain specified termination rights under the TTHC merger agreement. NEE expects the TTHC transaction to be completed in the first half of 2017.

On October 29, 2016, T & D Equity Acquisition, LLC (OMI purchaser), a wholly owned subsidiary of NEE, Oncor Management Investment LLC (OMI) and Oncor entered into an agreement for the OMI purchaser to purchase OMI's 0.22% interest in Oncor for approximately $27 million. This transaction is subject to NEE closing on its agreement to acquire EFH Corp. described above. NEE expects the OMI transaction to be completed in the first half of 2017.

The TTHC and OMI transactions, when combined with NEE’s agreement to acquire EFH Corp. described above, if approved, would result in NEE owning 100% of Oncor.

Proposed Sale Transaction - On November 1, 2016, FN Investments, LLC (FiberNet seller), an indirect wholly owned subsidiary of NEE, and CC FN Holdings LLC (FiberNet purchaser), a wholly owned subsidiary of Crown Castle International Corp., entered into an agreement whereby the FiberNet purchaser will acquire from the FiberNet seller all of the outstanding membership interests in FPL TEL, LLC, FPL FiberNet Holdings, LLC and NextEra FiberNet, LLC (together, FiberNet), which are wholly owned subsidiaries of NEE that provide fiber-optic network services, for a cash purchase price of $1.5 billion, subject to certain adjustments. NEE expects to use a portion of the proceeds to retire approximately $370 million principal amount of FiberNet long-term debt. FiberNet’s total assets and liabilities and its results of operations are not material to NEE. The transaction is subject to, among other things, approval by the Federal Communications Commission and the public service commissions of Georgia, Louisiana and Texas. NEE expects the transaction to close in the first half of 2017.