XML 74 R42.htm IDEA: XBRL DOCUMENT v3.3.1.900
Summary of Significant Accounting and Reporting Policies (Details)
account in Millions
1 Months Ended 12 Months Ended 48 Months Ended
Jul. 01, 2014
USD ($)
shares
Jun. 30, 2019
USD ($)
Jan. 31, 2018
USD ($)
Jan. 31, 2017
USD ($)
Dec. 31, 2015
USD ($)
account
unit
project
MW
shares
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2016
USD ($)
kWh
Sep. 30, 2015
USD ($)
Basis of Presentation [Abstract]                  
Approximate number of customer accounts | account         4.8        
Noncontrolling Interest [Abstract]                  
Deferred Gain on Sale of Property         $ 447,000,000 $ 299,000,000      
Electric Plant, Depreciation and Amortization [Abstract]                  
Convertible ITCs         1,800,000,000 1,600,000,000      
Convertible ITCs included in other receivables         $ 207,000,000 1,000,000      
Construction Activity [Abstract]                  
Deemed capital structure of NextEra Energy Resources (in hundredths)         70.00%        
Restricted Cash [Abstract]                  
Restricted cash, current         $ 244,000,000 228,000,000      
Income Taxes [Abstract]                  
Revenue equivalent of the difference in accumulated deferred income taxes computed under accounting rules, as compared to regulatory accounting rules         283,000,000 250,000,000      
Deferred income tax benefit associated with convertible ITCs         $ 48,000,000 50,000,000      
NextEra Energy Partners [Member]                  
Noncontrolling Interest [Abstract]                  
Number of projects | project         19        
Partnership Interest [Member]                  
Noncontrolling Interest [Abstract]                  
Partners' Capital Account, Units, Sold in Public Offering | shares 18,687,500                
Partners' Capital Account, Public Sale of Units Net of Offering Costs $ 438,000,000                
Assets and Liabilities Associated with Assets Held for Sale [Abstract]                  
Renewable Energy Assets, Power Generation Capacity | MW         2,210        
FPL [Member]                  
Revenues and Rates [Abstract]                  
Unbilled Receivables, Current         $ 246,000,000 223,000,000      
Franchise fees and gross receipts taxes         722,000,000 716,000,000 $ 680,000,000    
Surcharges related to storm-recovery         $ 115,000,000 109,000,000 108,000,000    
Electric Plant, Depreciation and Amortization [Abstract]                  
Percentage of electric generating assets to gross investment in electric utility plant in service (in hundredths)         50.00%        
Percentage of electric transmission assets to gross investment in electric utility plant in service (in hundredths)         11.00%        
Percentage of electric distribution assets to gross investment in electric utility plant in service (in hundredths)         33.00%        
Percentage of general facilities assets to gross investment in electric utility plant in service (in hundredths)         6.00%        
Convertible ITCs         $ 153,000,000 159,000,000      
Maximum interval between depreciation studies performed and filed with the FPSC (in years)         4        
Amount of reserve (reversal) amortization recognized         $ (15,000,000) $ (33,000,000) $ 155,000,000    
FPL's composite depreciation rate for electric plant in service (in hundredths)         3.30% 3.30% 3.40%    
Construction Activity [Abstract]                  
Threshold of plant in service balance at which AFUDC may be recorded (in hundredths)         0.50%        
AFUDC capitalization rate for FPL (in hundredths)         6.34% 6.34% 6.52%    
AFUDC capitalized for FPL         $ 88,000,000 $ 50,000,000 $ 81,000,000    
Decommissioning of Nuclear Plants, Dismantlement of Plants and Other Accrued Asset Removal Costs [Abstract]                  
Maximum interval between nuclear decommissioning studies submitted to the FPSC for approval (in years)         5 years        
For FPL, number of nuclear units | unit         4        
FPL's portion of the ultimate costs of nuclear decommissioning         $ 7,500,000,000        
FPL's Ultimate costs of nuclear decommissioning, in current year dollars         2,900,000,000        
FPL's fund earnings on decommissioning funds         $ 96,000,000 91,000,000 167,000,000    
Maximum interval between plant dismantlement studies submitted to the FPSC for approval (in years)         4 years        
Plant dismantlement expense approved by the FPSC, effective January 1, 2010         $ 18,000,000        
Ultimate Costs Of Plant Dismantlement         752,000,000        
Ultimate Costs Of Plant Dismantlement In Current Year Dollars         411,000,000        
Major Maintenance Costs [Abstract]                  
Accrued liability for nuclear maintenance costs         48,000,000 50,000,000      
Nuclear maintenance costs         90,000,000 76,000,000 92,000,000    
Restricted Cash [Abstract]                  
Restricted cash, current         75,000,000 38,000,000      
Securitized Storm-Recovery Costs, Storm Fund and Storm Reserve [Abstract]                  
Storm fund included in special use funds         74,000,000 75,000,000      
Capacity to absorb storm restoration costs         119,000,000        
Income Taxes [Abstract]                  
Revenue equivalent of the difference in accumulated deferred income taxes computed under accounting rules, as compared to regulatory accounting rules         268,000,000 236,000,000      
NEER [Member]                  
Electric Plant, Depreciation and Amortization [Abstract]                  
Net book value of assets serving as collateral         13,900,000,000        
Construction Activity [Abstract]                  
Project development costs of NextEra Energy Resources         133,000,000 122,000,000      
Interest capitalized on construction projects of NextEra Energy Resources         $ 100,000,000 104,000,000 109,000,000    
Deemed capital structure of NextEra Energy Resources (in hundredths)         70.00%        
Decommissioning of Nuclear Plants, Dismantlement of Plants and Other Accrued Asset Removal Costs [Abstract]                  
NextEra Energy Resources' ARO related to nuclear decommissioning         $ 423,000,000 462,000,000      
Ultimate Costs Of Nuclear Decommissioning For Wholly Owned Indirect Subsidiary         11,800,000,000        
Ultimate Costs Of Nuclear Decommissioning In Current Year Dollars For Wholly Owned Indirect Subsidiary         $ 1,900,000,000        
Effective period for Seabrook's decommissioning funding plan (in years)         4 years        
Major Maintenance Costs [Abstract]                  
Capitalized major maintenance costs         $ 97,000,000 141,000,000      
Major maintenance costs         $ 79,000,000 $ 81,000,000 93,000,000    
NEER [Member] | Variable Interest Entities Wind Primary Beneficiary [Member]                  
Variable Interest Entities [Abstract]                  
Wind Electric Generating Facility Capability | MW         5,272        
Forecast [Member]                  
FPSC rate orders [Abstract]                  
Regulatory return on common equity range (in hundredths)       0.50%          
Forecast [Member] | FPL [Member]                  
FPSC rate orders [Abstract]                  
Increase in base rate revenues     $ 265,000,000 $ 860,000,000       $ 350,000,000  
Regulatory return on common equity (in hundredths)       11.50%       10.50%  
Regulatory return on common equity range (in hundredths)               1.00%  
Earned regulatory ROE threshold below which retail base rate relief may be sought (in hundredths)               9.50%  
Earned regulatory ROE threshold above which retail base rate reduction may be sought (in hundredths)               11.50%  
Minimum depreciation reserve surplus that may be amortized under 2012 rate agreement               $ 224,000,000  
Maximum amount of fossil dismantlement reserve that may be amortized under the 2012 rate agreement               176,000,000  
Maximum surcharge               $ 4  
Increment of usage on which surcharge is based (in kilowatt-hours) | kWh               1,000  
Threshold of storm restoration costs in any given calendar year at which surcharge may be increased               $ 800,000,000  
Increase In Base Rate Revenues, Effective Upon Contingent Approval   $ 200,000,000              
Wind plants [Member] | NEER [Member]                  
Electric Plant, Depreciation and Amortization [Abstract]                  
Percentage of gross depreciable assets by plant type         62.00% 63.00%      
Nuclear Plant [Member] | NEER [Member]                  
Electric Plant, Depreciation and Amortization [Abstract]                  
Percentage of gross depreciable assets by plant type         11.00% 12.00%      
natural gas plant [Member] | NEER [Member]                  
Electric Plant, Depreciation and Amortization [Abstract]                  
Percentage of gross depreciable assets by plant type         3.00% 8.00%      
Solar plants [Member] | NEER [Member]                  
Electric Plant, Depreciation and Amortization [Abstract]                  
Percentage of gross depreciable assets by plant type         9.00% 7.00%      
Oil and Gas Properties [Member] | NEER [Member]                  
Electric Plant, Depreciation and Amortization [Abstract]                  
Percentage of gross depreciable assets by plant type         7.00% 6.00%      
Merchant Natural Gas Generation Facilities [Member] | Subsidiary of NEER [Member]                  
Assets and Liabilities Associated with Assets Held for Sale [Abstract]                  
Renewable Energy Assets, Power Generation Capacity | MW         2,884        
Minimum [Member] | wind, natural gas and solar plants [Member] | NEER [Member]                  
Electric Plant, Depreciation and Amortization [Abstract]                  
Property, plant and equipment, estimated useful lives (in years)         25 years        
Minimum [Member] | Nuclear Plant [Member] | NEER [Member]                  
Electric Plant, Depreciation and Amortization [Abstract]                  
Property, plant and equipment, estimated useful lives (in years)         25 years        
Maximum [Member] | wind, natural gas and solar plants [Member] | NEER [Member]                  
Electric Plant, Depreciation and Amortization [Abstract]                  
Property, plant and equipment, estimated useful lives (in years)         30 years        
Maximum [Member] | Nuclear Plant [Member] | NEER [Member]                  
Electric Plant, Depreciation and Amortization [Abstract]                  
Property, plant and equipment, estimated useful lives (in years)         47 years        
Indirect Wholly-Owned Subsidiary [Member] | Partnership Interest [Member]                  
Noncontrolling Interest [Abstract]                  
Payments to Acquire Limited Partnership Interests $ 288,000,000       $ 288,000,000        
NEP OpCo [Member]                  
Noncontrolling Interest [Abstract]                  
Partners' Capital Account, Units, Retained | shares 74,440,000                
Noncontrolling interest ownership percentage 79.90%       76.80%        
NEP OpCo [Member] | Partnership Interest [Member]                  
Noncontrolling Interest [Abstract]                  
Payments to Acquire Limited Partnership Interests $ 150,000,000                
Termination of the Merger Agreement [Member] | HEI [Member]                  
Proposed Merger [Abstract]                  
Amount of termination fee           $ 90,000,000      
Reimbursement of out of pocket expenses           $ 5,000,000      
Common Units [Member] | NextEra Energy Partners [Member]                  
Noncontrolling Interest [Abstract]                  
Common units sold during period | shares         11,857,925        
Common Units [Member] | Subsidiary of NextEra Energy [Member] | NEP OpCo [Member]                  
Noncontrolling Interest [Abstract]                  
Common units sold during period | shares         27,000,000        
Common Units [Member] | HEI [Member]                  
Proposed Merger [Abstract]                  
Number of shares received per common stock           0.2413      
Common Units [Member] | NextEra Energy Partners [Member] | NEP OpCo [Member]                  
Noncontrolling Interest [Abstract]                  
Common units sold during period | shares         11,857,925        
Coal Fired Generation Facility [Member] | FPL [Member]                  
Regulated Operations [Abstract]                  
Termination of Purchased Power Agreement and Purchase Price of Generation Facility                 $ 521,000,000
Regulatory Asset, Amortization Period         9 years        
Regulatory Asset, Recovery Through Capacity Clause         $ 709,000,000        
Regulatory Asset, Recovery Through Base Rates Until Next Test Year         138,000,000        
Regulatory Assets, Net of Amortization         817,000,000        
Reduction To Reserve Amount Related to Settlement That May Be Amortized Under the 2012 Rate Agreement         30,000,000        
Reserve Amount That May Be Amortized Under the 2012 Rate Agreement Less Reduction Related to Settlement         370,000,000        
Reserve Amount That May Be Amortized Under the 2012 Rate Agreement         $ 400,000,000        
FPSC rate orders [Abstract]                  
Earned regulatory ROE threshold below which retail base rate relief may be sought (in hundredths)         9.50%        
Adjustments for New Accounting Pronouncement [Member]                  
Debt Issuance Costs [Abstract]                  
Reclassification of debt issuance costs           $ 324,000,000 298,000,000    
Adjustments for New Accounting Pronouncement [Member] | FPL [Member]                  
Debt Issuance Costs [Abstract]                  
Reclassification of debt issuance costs           $ 85,000,000 $ 68,000,000