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Equity Method Investment OTTI

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Equity Method Investment, Ownership Percentage Sold

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Loss from Equity Method Investment Not Recognized

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Reinvestment of Proceeds from Sale of Equity Method Investments

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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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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Fair value portion of investments accounted under the equity method.

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Amount of realized and unrealized gain (loss) on investment.

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Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Value of the investment at close of period. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

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Amount after income tax of income (loss) including the portion attributable to nonredeemable noncontrolling interest. Excludes the portion attributable to redeemable noncontrolling interest recognized as temporary equity.

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The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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Investments In and Advances To Affiliates (Details) - USD ($) $ in Millions		3 Months Ended				9 Months Ended		12 Months Ended
	Apr. 18, 2019	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Jun. 22, 2020	Jul. 01, 2019	Mar. 31, 2019
Investments in and Advances to Affiliates [Line Items]
Revenue		$ 2,545			$ 2,625	$ 7,100	$ 7,758
Operating margin (loss)		756			701	1,787	1,789
Gain (Loss) on Disposition of Business		(90)			16	(117)	9
Income (Loss) from Equity Method Investments		$ (112)			$ 4	(106)	3
Minority Owned Affiliates [Member]
Investments in and Advances to Affiliates [Line Items]
Revenue						1,404	807
Operating margin (loss)						203	87
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest						(444)	(65)
Majority Owned Affiliate [Member]
Investments in and Advances to Affiliates [Line Items]
Revenue						1	12
Operating margin (loss)						(2)	(2)
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest						(3)	(7)
OPGC [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investments, Fair Value Disclosure				$ 152				$ 212
Equity Method Investment OTTI			$ 158	$ 43		201		$ 92
Equity Method Investment, Ownership Percentage Sold									49.00%
sPower [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Ownership Percentage Sold	48.00%
Proceeds from Sale of Equity Method Investments	$ 173
Reinvestment of Proceeds from Sale of Equity Method Investments	58					0	58
Gain (Loss) on Disposition of Business	$ 28
Equity Method Investment, Ownership Percentage	26.00%										50.00%
Gain (Loss) on Investments							12
Guacolda [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment Long Lived Asset Impairment						120
Unrecognized Equity Method Loss						$ 114
Energía Natural Dominicana Enadom [Member]
Investments in and Advances to Affiliates [Line Items]
Business Combination, Consideration Transferred							55
Gain (Loss) on Investments							2
Uplight [Member]
Investments in and Advances to Affiliates [Line Items]
Business Combination, Consideration Transferred							$ 53
Investments in and Advances to Affiliates, at Fair Value										$ 98