NEP Deconsolidation NEP Deconsolidation	9 Months Ended
Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
NEP Deconsolidation	NEP Deconsolidation During the third quarter of 2017, changes to NEP's governance structure were made that, among other things, enhanced NEP unitholder governance rights. The new governance structure established a NEP board of directors where NEP unitholders have the ability to nominate and elect board members, subject to certain limitations and requirements. As a result of these governance changes, NEP was deconsolidated from NEE on January 1, 2018, which is when the term of office of the first NEP unitholder-elected directors took effect. NEER continues to operate the projects owned by NEP and provide services to NEP under various related party operations and maintenance, administrative and management services agreements. In connection with the deconsolidation, NEE recorded an initial investment in NEP of approximately $4.4 billion based on the fair value of NEP OpCo and NEP common units that were held by subsidiaries of NEE on the deconsolidation date, which investment is included in investment in equity method investees on NEE's condensed consolidated balance sheet at September 30, 2018. The fair value was based on the market price of NEP common units as of January 1, 2018, which resulted in NEE recording a gain of approximately $3.9 billion ($3.0 billion after tax) during the nine months ended September 30, 2018. Total assets of approximately $7.8 billion, primarily property, plant and equipment, total liabilities of approximately $4.8 billion, primarily long-term debt, and total noncontrolling interests of approximately $2.7 billion were removed from NEE's balance sheet as part of the deconsolidation. During the third quarter 2018, NEP issued approximately $82 million of its common units under its $150 million at-the-market equity issuance program implemented in July 2018, which replaced the prior program, resulting in a decrease in NEE's partnership interest in NEP OpCo. As a result, at September 30, 2018, NEE's equity method investment in NEP represents NEE’s partnership interest in NEP OpCo's operating projects of approximately 64.4% (and NEE’s direct interest in 2.5% of NEP’s common units). The equity method investment in NEP includes approximately $3.3 billion related to NEE’s share of the basis difference between the fair value and the underlying carrying value of NEP’s net assets attributable to NEP OpCo's common unitholders at September 30, 2018, a portion of which is being amortized. Basis difference amounts related to property, plant and equipment, net are being amortized over the remaining useful lives of such property, and amounts related to power purchase agreements are being amortized over the remaining terms of such agreements. The related amortization is included in equity in earnings of equity method investees in NEE's condensed consolidated statements of income. NEER provides management, administrative and transportation and fuel management services to NEP and its subsidiaries under various agreements (service agreements). NEER is also party to a cash sweep and credit support (CSCS) agreement with a subsidiary of NEP. At September 30, 2018, the cash sweep amount (due to NEP and its subsidiaries) held in accounts belonging to NEER or its subsidiaries was approximately $807 million and is included in accounts payable. Fee income totaling approximately $18 million and $66 million related to the CSCS agreement and the service agreements is included in operating revenues in NEE's condensed consolidated statements of income for the three and nine months ended September 30, 2018, respectively. Amounts due from NEP of approximately $38 million and $21 million at September 30, 2018 are primarily included in other receivables and noncurrent other assets, respectively. Under the CSCS agreement, NEECH or NEER guaranteed or provided indemnifications, letters of credit or bonds totaling approximately $635 million at September 30, 2018 primarily related to obligations on behalf of NEP's subsidiaries with maturity dates ranging from 2018 to 2050 and including certain project performance obligations, obligations under financing and interconnection agreements and obligations related to the sale of differential membership interests. Payment guarantees and related contracts with respect to unconsolidated entities for which NEE or one of its subsidiaries are the guarantor are recorded on NEE’s condensed consolidated balance sheet at fair value. As a result of deconsolidation, approximately $32 million related to the fair value of the credit support provided under the CSCS agreement is recorded as noncurrent other liabilities on NEE's condensed consolidated balance sheet at September 30, 2018. In August 2018, subsidiaries of NEER entered into an agreement with a subsidiary of NEP to sell ownership interests in certain wind and solar generation facilities. See Note 11 - Assets and Liabilities Associated with Assets Held for Sale.

NEP Deconsolidation

During the third quarter of 2017, changes to NEP's governance structure were made that, among other things, enhanced NEP unitholder governance rights. The new governance structure established a NEP board of directors where NEP unitholders have the ability to nominate and elect board members, subject to certain limitations and requirements. As a result of these governance changes, NEP was deconsolidated from NEE on January 1, 2018, which is when the term of office of the first NEP unitholder-elected directors took effect. NEER continues to operate the projects owned by NEP and provide services to NEP under various related party operations and maintenance, administrative and management services agreements.

In connection with the deconsolidation, NEE recorded an initial investment in NEP of approximately $4.4 billion based on the fair value of NEP OpCo and NEP common units that were held by subsidiaries of NEE on the deconsolidation date, which investment is included in investment in equity method investees on NEE's condensed consolidated balance sheet at September 30, 2018. The fair value was based on the market price of NEP common units as of January 1, 2018, which resulted in NEE recording a gain of approximately $3.9 billion ($3.0 billion after tax) during the nine months ended September 30, 2018. Total assets of approximately $7.8 billion, primarily property, plant and equipment, total liabilities of approximately $4.8 billion, primarily long-term debt, and total noncontrolling interests of approximately $2.7 billion were removed from NEE's balance sheet as part of the deconsolidation.

During the third quarter 2018, NEP issued approximately $82 million of its common units under its $150 million at-the-market equity issuance program implemented in July 2018, which replaced the prior program, resulting in a decrease in NEE's partnership interest in NEP OpCo. As a result, at September 30, 2018, NEE's equity method investment in NEP represents NEE’s partnership interest in NEP OpCo's operating projects of approximately 64.4% (and NEE’s direct interest in 2.5% of NEP’s common units). The equity method investment in NEP includes approximately $3.3 billion related to NEE’s share of the basis difference between the fair value and the underlying carrying value of NEP’s net assets attributable to NEP OpCo's common unitholders at September 30, 2018, a portion of which is being amortized. Basis difference amounts related to property, plant and equipment, net are being amortized over the remaining useful lives of such property, and amounts related to power purchase agreements are being amortized over the remaining terms of such agreements. The related amortization is included in equity in earnings of equity method investees in NEE's condensed consolidated statements of income.

NEER provides management, administrative and transportation and fuel management services to NEP and its subsidiaries under various agreements (service agreements). NEER is also party to a cash sweep and credit support (CSCS) agreement with a subsidiary of NEP. At September 30, 2018, the cash sweep amount (due to NEP and its subsidiaries) held in accounts belonging to NEER or its subsidiaries was approximately $807 million and is included in accounts payable. Fee income totaling approximately $18 million and $66 million related to the CSCS agreement and the service agreements is included in operating revenues in NEE's condensed consolidated statements of income for the three and nine months ended September 30, 2018, respectively. Amounts due from NEP of approximately $38 million and $21 million at September 30, 2018 are primarily included in other receivables and noncurrent other assets, respectively. Under the CSCS agreement, NEECH or NEER guaranteed or provided indemnifications, letters of credit or bonds totaling approximately $635 million at September 30, 2018 primarily related to obligations on behalf of NEP's subsidiaries with maturity dates ranging from 2018 to 2050 and including certain project performance obligations, obligations under financing and interconnection agreements and obligations related to the sale of differential membership interests. Payment guarantees and related contracts with respect to unconsolidated entities for which NEE or one of its subsidiaries are the guarantor are recorded on NEE’s condensed consolidated balance sheet at fair value. As a result of deconsolidation, approximately $32 million related to the fair value of the credit support provided under the CSCS agreement is recorded as noncurrent other liabilities on NEE's condensed consolidated balance sheet at September 30, 2018.

In August 2018, subsidiaries of NEER entered into an agreement with a subsidiary of NEP to sell ownership interests in certain wind and solar generation facilities. See Note 11 - Assets and Liabilities Associated with Assets Held for Sale.