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Commitments and Contingencies (Required Capacity and/or Minimum Payments Under Contracts) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
NEER Segment
Long-term Purchase Commitment [Line Items]
Capacity payments and/or minimum payments - 2022	$ 4,400
Capacity payments and/or minimum payments - 2023	365
Capacity payments and/or minimum payments - 2024	185
Capacity payments and/or minimum payments - 2025	85
Capacity payments and/or minimum payments - 2026	65
Capacity payments and/or minimum payments - Thereafter	570
Commitment to invest	370
Joint Obligations First Year	610
Joint Obligations Second Year	20
Joint Obligations Third Year	5
Joint Obligations Fourth Year	5
Joint Obligations Fifth Year	0
Joint ObligationsThereafter	$ 5
Mountain Valley Pipeline [Member] | NEER Segment
Long-term Purchase Commitment [Line Items]
Natural gas transportation agreement, term	20 years
Amounts Excluded from Required Capacity and or Minimum Payments, Annual Commitment	$ 70
Contract Group 1 [Member] | NEER Segment
Long-term Purchase Commitment [Line Items]
Commitment amount included in capital expenditures	4,300
FPL [Member]
Long-term Purchase Commitment [Line Items]
Capacity payments and/or minimum payments - 2022	1,025
Capacity payments and/or minimum payments - 2023	980
Capacity payments and/or minimum payments - 2024	955
Capacity payments and/or minimum payments - 2025	900
Capacity payments and/or minimum payments - 2026	825
Capacity payments and/or minimum payments - Thereafter	8,570
Related Party Transaction, Amounts of Transaction	419	$ 386	$ 316
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 - 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 - 2026	400
Capacity payments and/or minimum payments - Thereafter	$ 5,960
Join Venture [Member] | NEER Segment
Long-term Purchase Commitment [Line Items]
Ownership interest	31.90%
Consolidation, Eliminations [Member] | FPL [Member]
Long-term Purchase Commitment [Line Items]
Related Party Transaction, Amounts of Transaction	$ 105	$ 108	$ 108

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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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