Commitments and Contingencies (Long-term Purchase Commitment) (Details) $ in Millions		3 Months Ended		6 Months Ended
	May 01, 2017 MMBTU / d	Jun. 30, 2016 USD ($) MW	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) MW	Jun. 30, 2015 USD ($)	Apr. 01, 2016	Dec. 31, 2015 USD ($)	Oct. 01, 2015 USD ($)
Corporate and Other [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2016		$ 85		$ 85
2017		5		5
2018		5		5
2019		0		0
2020		5		5
Thereafter		0		0
Commitment to invest		35		35
Joint Obligations Of NEECH and NEER included NEER Amounts due in the current year		495		495
FPL [Member]
Required capacity and/or minimum payments [Abstract]
Capacity payments		46	$ 117	93	$ 236
Energy payments		31	$ 78	47	$ 122
FPL [Member] | Capacity Charges [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2016		85		85
2017		170		170
2018		155		155
2019		135		135
2020		110		110
Thereafter		690		$ 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		635		$ 635
2017		1,010		1,010
2018		870		870
2019		860		860
2020		910		910
Thereafter		12,970		12,970
FPL [Member] | Coal Contract Minimum Payments [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2016		50		50
2017		45		45
2018		5		5
2019		5		5
2020		0		0
Thereafter		0		$ 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		$ 200
2018		295		295
2019		290		290
2020		360		360
Thereafter		7,885		7,885
NextEra Energy Resources [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2016		2,040		2,040
2017		835		835
2018		775		775
2019		180		180
2020		85		85
Thereafter		350		350
NextEra Energy Resources [Member] | Contract Group 1 [Member]
Long-term Purchase Commitment [Line Items]
Commitment amount included in capital expenditures		4,000		4,000
NextEra Energy Resources [Member] | Sabal Trail Transmission, LLC [Member]
Long-term Purchase Commitment [Line Items]
Equity Method Investment, Percentage of Interests Acquired						9.50%
Equity Method Investment, Ownership Percentage						42.50%
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
Contingent Holdback [Member]
Long-term Purchase Commitment [Line Items]
Decrease in contingent consideration liability		17		17
Other Current Liabilities [Member] | Contingent Holdback [Member]
Long-term Purchase Commitment [Line Items]
Contingent consideration liability		170		170
Other Current Liabilities [Member] | Indemnification Obligations [Member]
Long-term Purchase Commitment [Line Items]
Contingent consideration liability		$ 194		194
Other Liabilities [Member] | Contingent Holdback [Member]
Long-term Purchase Commitment [Line Items]
Contingent consideration liability							$ 186
Other Liabilities [Member] | Indemnification Obligations [Member]
Long-term Purchase Commitment [Line Items]
Contingent consideration liability							$ 188
Indiantown, Florida [Member] | FPL [Member] | Coal Fired Generation Facility [Member]
Long-term Purchase Commitment [Line Items]
Coal fired generating facility capacity (in megawatts) | MW		330
Purchase price		$ 451		451
Existing debt assumed		218		218
Remaining payments under long term purchased power agreement, total		833		833
Remainder of 2016 payments under long term purchased power agreement		$ 47		$ 47