NEP Deconsolidation NEP Deconsolidation	3 Months Ended
Mar. 31, 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 investment in NEP of approximately $4.4 billion, which is reflected as investment in equity method investees on NEE's condensed consolidated balance sheets at March 31, 2018, based on the fair value of NEP OpCo and NEP common units that were held by subsidiaries of NEE on the deconsolidation date. 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 three months ended March 31, 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. The equity method investment in NEP represents NEE’s partnership interest in NEP OpCo's operating projects of approximately 65.1% (and NEE’s direct interest in 2.6% of NEP’s common units) at March 31, 2018. The equity method investment in NEP included approximately $3.5 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 March 31, 2018, a portion of which will be 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 reflected 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 March 31, 2018, the cash sweep amount (due to NEP and its subsidiaries) held in accounts belonging to NEER or its subsidiaries was approximately $89 million. Fee income totaling approximately $24 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 months ended March 31, 2018. Amounts due from NEP of approximately $40 million and $22 million at March 31, 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 $690 million at March 31, 2018 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. Upon 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 March 31, 2018.

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 investment in NEP of approximately $4.4 billion, which is reflected as investment in equity method investees on NEE's condensed consolidated balance sheets at March 31, 2018, based on the fair value of NEP OpCo and NEP common units that were held by subsidiaries of NEE on the deconsolidation date. 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 three months ended March 31, 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.

The equity method investment in NEP represents NEE’s partnership interest in NEP OpCo's operating projects of approximately 65.1% (and NEE’s direct interest in 2.6% of NEP’s common units) at March 31, 2018. The equity method investment in NEP included approximately $3.5 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 March 31, 2018, a portion of which will be 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 reflected 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 March 31, 2018, the cash sweep amount (due to NEP and its subsidiaries) held in accounts belonging to NEER or its subsidiaries was approximately $89 million. Fee income totaling approximately $24 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 months ended March 31, 2018. Amounts due from NEP of approximately $40 million and $22 million at March 31, 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 $690 million at March 31, 2018 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. Upon 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 March 31, 2018.