Summary of Significant Accounting and Reporting Policies	3 Months Ended
Mar. 31, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting and Reporting Policies	Summary of Significant Accounting and Reporting Policies Restricted Cash - At March 31, 2019 and December 31, 2018, NEE had approximately $369 million ($122 million for FPL) and $4,615 million ($142 million for FPL), respectively, of restricted cash, of which approximately $307 million ($61 million for FPL) and $89 million ($81 million for FPL), respectively, is included in current other assets and the remaining balance is included in noncurrent other assets on NEE's and FPL's condensed consolidated balance sheets. Restricted cash is primarily related to debt service payments, bond proceeds held for construction at FPL and margin cash collateral requirements, and, at December 31, 2018, also related to cash restricted for the acquisition of Gulf Power (see Note 7 - Gulf Power). In addition, where offsetting positions exist, restricted cash related to margin cash collateral is netted against derivative instruments, which totaled $57 million and $184 million at March 31, 2019 and December 31, 2018, respectively. See Note 4. Assets and Liabilities Associated with Assets Held for Sale - In March 2019, subsidiaries of NEER entered into an agreement to sell their ownership interests in three wind generation facilities and three solar generation facilities located in the Midwest and West regions of the U.S. with a total net generating capacity of 611 MW to a NEP subsidiary for a cash purchase price of approximately $1,020 million, subject to certain adjustments. A NEER affiliate will continue to operate the facilities included in the sale. The transaction is expected to close in the second quarter of 2019, pending the receipt of necessary regulatory approvals and satisfaction of other 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 sheets at March 31, 2019 primarily represent property, plant and equipment and the related long-term debt.

Summary of Significant Accounting and Reporting Policies

Restricted Cash - At March 31, 2019 and December 31, 2018, NEE had approximately $369 million ($122 million for FPL) and $4,615 million ($142 million for FPL), respectively, of restricted cash, of which approximately $307 million ($61 million for FPL) and $89 million ($81 million for FPL), respectively, is included in current other assets and the remaining balance is included in noncurrent other assets on NEE's and FPL's condensed consolidated balance sheets. Restricted cash is primarily related to debt service payments, bond proceeds held for construction at FPL and margin cash collateral requirements, and, at December 31, 2018, also related to cash restricted for the acquisition of Gulf Power (see Note 7 - Gulf Power). In addition, where offsetting positions exist, restricted cash related to margin cash collateral is netted against derivative instruments, which totaled $57 million and $184 million at March 31, 2019 and December 31, 2018, respectively. See Note 4.

Assets and Liabilities Associated with Assets Held for Sale - In March 2019, subsidiaries of NEER entered into an agreement to sell their ownership interests in three wind generation facilities and three solar generation facilities located in the Midwest and West regions of the U.S. with a total net generating capacity of 611 MW to a NEP subsidiary for a cash purchase price of approximately $1,020 million, subject to certain adjustments. A NEER affiliate will continue to operate the facilities included in the sale. The transaction is expected to close in the second quarter of 2019, pending the receipt of necessary regulatory approvals and satisfaction of other 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 sheets at March 31, 2019 primarily represent property, plant and equipment and the related long-term debt.