Capacity of Assets

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- Definition

EquityMethodInvestmentVotingRightsOwnershipPercentage

+ References

No definition available.

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- Definition

Number of Cell Projects

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No definition available.

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- Definition

Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

+ References

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-Publisher FASB
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-Topic 230
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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
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-Paragraph 3
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- Definition

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 8A
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- Definition

Amount of distribution received from equity method investee for return of investment, classified as investing activities. Excludes distribution for return on investment, classified as operating activities.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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.

+ References

No definition available.

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Investments in Unconsolidated Affiliates (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) asset MW	Dec. 31, 2019 USD ($)
Investments In Unconsolidated Affiliates [Line Items]
Distributions from equity investments	$ 80	$ 37	$ 55
Distributions from equity investments, return of capital	$ 44	$ 133	11
Electric Utilities and Infrastructure \| DATC
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	50.00%
Electric Utilities and Infrastructure \| Pioneer
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	50.00%
Gas Utilities and Infrastructure \| Sabal Trail
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	7.50%
Gas Utilities and Infrastructure \| Constitution
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	24.00%
Impairment losses			$ 25
Gas Utilities and Infrastructure \| ACP
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	47.00%
Gas Utilities and Infrastructure \| SustainRNG
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	29.68%
Gas Utilities and Infrastructure \| Sustain T&W
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	70.00%
Commercial Renewables \| Non-consolidated VIEs
Investments In Unconsolidated Affiliates [Line Items]
Number of cell projects \| asset		70
Capacity of assets \| MW		43
Commercial Renewables \| DS Cornerstone
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	26.00%		50.00%
Other \| NMC
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	17.50%
Board representation and voting rights, ownership percentage	25.00%
Piedmont
Investments In Unconsolidated Affiliates [Line Items]
Distributions from equity investments	$ 8	$ 2	$ 1
Distributions from equity investments, return of capital	$ 2	$ 2	$ 4
Piedmont \| Gas Utilities and Infrastructure \| Cardinal
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	21.49%
Piedmont \| Gas Utilities and Infrastructure \| Pine Needle
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	45.00%
Piedmont \| Gas Utilities and Infrastructure \| Hardy Storage
Investments In Unconsolidated Affiliates [Line Items]
Ownership interest	50.00%