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Commitments and Contingencies (Required Capacity and/or Minimum Payments Under Contracts) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
FPL[Member]
Long-term Purchase Commitment [Line Items]
Capacity payments and/or minimum payments - 2021	$ 1,030
Capacity payments and/or minimum payments - 2022	970
Capacity payments and/or minimum payments - 2023	950
Capacity payments and/or minimum payments - 2024	940
Capacity payments and/or minimum payments - 2025	890
Capacity payments and/or minimum payments - Thereafter	9,380
Related Party Transaction, Amounts of Transaction	386	$ 316	$ 303
FPL[Member] | Natural Gas Including Transportation and Storage Contract Minimum Payments [Member] | Sabal Trail and Florida Southeast Connection [Member]
Long-term Purchase Commitment [Line Items]
Capacity payments and/or minimum payments - 2021	415
Capacity payments and/or minimum payments - 2022	415
Capacity payments and/or minimum payments - 2023	410
Capacity payments and/or minimum payments - 2024	410
Capacity payments and/or minimum payments - 2025	405
Capacity payments and/or minimum payments - Thereafter	6,360
NEER [Member]
Long-term Purchase Commitment [Line Items]
Capacity payments and/or minimum payments - 2021	3,250
Capacity payments and/or minimum payments - 2022	530
Capacity payments and/or minimum payments - 2023	210
Capacity payments and/or minimum payments - 2024	210
Capacity payments and/or minimum payments - 2025	140
Capacity payments and/or minimum payments - Thereafter	1,635
Commitment to invest	85
Joint Obligations First Year	480
Joint Obligations Second Year	20
Joint Obligations Third Year	20
Joint Obligations Fourth Year	10
Joint Obligations Fifth Year	10
Joint Obligations After Fifth Year	5
NEER [Member] | Mountain Valley Pipeline [Member]
Long-term Purchase Commitment [Line Items]
Capacity payments and/or minimum payments - 2022	25
Capacity payments and/or minimum payments - 2023	70
Capacity payments and/or minimum payments - 2024	70
Capacity payments and/or minimum payments - 2025	70
Capacity payments and/or minimum payments - Thereafter	1,155
NEER [Member] | Contract Group 1 [Member]
Long-term Purchase Commitment [Line Items]
Commitment amount included in capital expenditures	$ 3,400
Join Venture [Member] | NEER [Member]
Long-term Purchase Commitment [Line Items]
Ownership interest	31.50%
Consolidation, Eliminations [Member] | FPL[Member]
Long-term Purchase Commitment [Line Items]
Related Party Transaction, Amounts of Transaction	$ 108	$ 108	$ 95

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- Definition

Commitment to invest in clean power and technology businesses.

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No definition available.

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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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