Commitments and Contingencies (Long-term Purchase Commitment) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
FPL [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2019	$ 500		$ 500
2020	1,000		1,000
2021	995		995
2022	975		975
2023	975		975
Thereafter	11,505		11,505
Related Party Transaction, Amounts of Transaction	77	$ 75	156	$ 148
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]
Remainder of 2019	160		160
2020	385		385
2021	415		415
2022	415		415
2023	410		410
Thereafter	7,175		7,175
NextEra Energy Resources [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2019	2,185		2,185
2020	1,545		1,545
2021	210		210
2022	195		195
2023	125		125
Thereafter	1,505		1,505
Commitment to invest	135		135
NextEra Energy Resources [Member] \| Contract Group 1 [Member]
Long-term Purchase Commitment [Line Items]
Commitment amount included in capital expenditures	3,800		3,800
NextEra Energy Resources [Member] \| Mountain Valley Pipeline [Member]
Required capacity and/or minimum payments [Abstract]
2021	70		70
2022	70		70
2023	70		70
Thereafter	$ 1,180		$ 1,180
Equity method investment, ownership percentage	31.00%		31.00%
Corporate and Other [Member]
Required capacity and/or minimum payments [Abstract]
Remainder of 2019	$ 105		$ 105
2020	75		75
2021	75		75
2022	0		0
2023	0		0
Thereafter	0		0
Joint Obligations Remainder Current Year	85		85
Joint Obligations Second Year	30		30
Joint Obligations Third Year	30		30
Joint Obligations Fourth Year	25		25
Joint Obligations Fifth Year	15		15
Consolidation, Eliminations [Member] \| FPL [Member]
Required capacity and/or minimum payments [Abstract]
Related Party Transaction, Amounts of Transaction	$ 26	$ 23	$ 53	$ 45

Commitment to invest in clean power and technology businesses.

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Commitments included in planned capital expenditures

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Estimated required capacity and/or minimum payments after the fifth year.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of transactions with related party during the financial reporting period.

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