Commitments and Contingencies (Long-term Purchase Commitment) (Details) $ in Millions		3 Months Ended
	May. 01, 2017 MMBTU / d	Mar. 31, 2016 USD ($) MW	Mar. 31, 2015 USD ($)	Apr. 01, 2016	Oct. 01, 2015 USD ($)
Corporate and Other [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2016		$ 80
2017		5
2018		5
2019		0
2020		5
Thereafter		0
Commitment to invest		35
Joint Obligations Of NEECH and NEER included NEER Amounts due in the current year		865
FPL [Member]
Required capacity and/or minimum payments [Abstract]
Capacity payments		47	$ 119
Energy payments		16	$ 44
FPL [Member] | Capacity Charges [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2016		135
2017		170
2018		155
2019		135
2020		110
Thereafter		$ 690
FPL [Member] | Take-or-Pay Contract Range 1 [Member]
Long-term Purchase Commitment [Line Items]
Minimum annual purchase commitments (in megawatts) | MW		375
FPL [Member] | Natural Gas, Including Transportation And Storage, Contract Minimum Payments [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2016		$ 795
2017		930
2018		870
2019		860
2020		910
Thereafter		12,970
FPL [Member] | Coal Contract Minimum Payments [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2016		70
2017		45
2018		5
2019		5
2020		0
Thereafter		$ 0
FPL [Member] | Pay-for-Performance Contracts [Member]
Long-term Purchase Commitment [Line Items]
Minimum total purchase commitments (in megawatts) | MW		444
FPL [Member] | Scenario, Forecast [Member] | Sabal Trail and Florida Southeast Connection [Member]
Long-term Purchase Commitment [Line Items]
Time period under contracts	25 years
Long Term Purchase Commiment, Initial Quantity Per Day | MMBTU / d	400,000
Long Term Purchase Commitment, Increased Volume Required | MMBTU / d	600,000
FPL [Member] | Sabal Trail and Florida Southeast Connection [Member] | Natural Gas, Including Transportation And Storage, Contract Minimum Payments [Member]
Required capacity and/or minimum payments [Abstract]
2017		$ 200
2018		295
2019		290
2020		360
Thereafter		7,885
NextEra Energy Resources [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2016		3,515
2017		750
2018		610
2019		130
2020		75
Thereafter		320
NextEra Energy Resources [Member] | Contract Group 1 [Member]
Long-term Purchase Commitment [Line Items]
Commitment amount included in capital expenditures		5,100
NextEra Energy Resources [Member] | Sabal Trail Transmission, LLC [Member]
Long-term Purchase Commitment [Line Items]
Equity Method Investment, Ownership Percentage				42.50%
NextEra Energy Resources [Member] | Sabal Trail Transmission, LLC [Member] | Subsequent Event [Member]
Long-term Purchase Commitment [Line Items]
Equity Method Investment, Percentage of Interests Acquired				9.50%
Holdback Payable [Member] | NET Holdings Management, LLC [Member] | Subsidiary of NextEra Energy Partners [Member]
Long-term Purchase Commitment [Line Items]
Contingent consideration liability					$ 200
Indemnity Holdback [Member] | NET Holdings Management, LLC [Member] | Subsidiary of NextEra Energy Partners [Member]
Long-term Purchase Commitment [Line Items]
Contingent consideration liability					$ 200
Other Current Liabilities [Member] | Contingent Holdback [Member]
Long-term Purchase Commitment [Line Items]
Contingent consideration liability		187
Other Liabilities [Member] | Indemnification Obligations [Member]
Long-term Purchase Commitment [Line Items]
Contingent consideration liability		$ 191