Investments in affiliates that are not controlled by Duke Energy, but over which it has significant influence, are accounted for using the equity method.

The following table presents Duke Energy’s investments in unconsolidated affiliates accounted for under the equity method, as well as the respective equity in earnings, by segment, for periods presented in this filing.


	Years Ended December 31,
	2021				2020				2019
			Equity in				Equity in		Equity in
			earnings				earnings		earnings
(in millions)	Investments		(losses)		Investments		(losses)		(losses)
Electric Utilities and Infrastructure	$	104	$	7	$	105	$	(1)	$	9
Gas Utilities and Infrastructure	231		8		215		(2,017)		114
Commercial Renewables	513		(34)		534		—		(4)
Other	122		47		107		13		43
Total	$	970	$	28	$	961	$	(2,005)	$	162

During the years ended December 31, 2021, 2020 and 2019, Duke Energy received distributions from equity investments of $80 million, $37 million and $55 million, respectively, which are included in Other assets within Cash Flows from Operating Activities on the Consolidated Statements of Cash Flows. During the years ended December 31, 2021, 2020 and 2019, Duke Energy received distributions from equity investments of $44 million, $133 million and $11 million, respectively, which are included in Return of investment capital within Cash Flows from Investing Activities on the Consolidated Statements of Cash Flows.

During the years ended December 31, 2021, 2020 and 2019, Piedmont received distributions from equity investments of $8 million, $2 million and $1 million, respectively, which are included in Other assets within Cash Flows from Operating Activities and $2 million, $2 million and $4 million, respectively, which are included within Cash Flows from Investing Activities on the Consolidated Statements of Cash Flows.

Duke Energy owns 50% interests in both DATC and Pioneer, which build, own and operate electric transmission facilities in North America.

Duke Energy owns a 7.5% interest in Sabal Trail, a 517-mile interstate natural gas pipeline, which provides natural gas to Duke Energy Florida and Florida Power and Light.

Duke Energy recorded OTTIs of $25 million within Equity in earnings (losses) of unconsolidated affiliates on Duke Energy's Consolidated Statements of Operations for the year ended December 31, 2019, to completely impair its 24% ownership interest in Constitution.

Duke Energy owns a 47% interest in the ACP pipeline. In 2020, Duke Energy determined it would no longer continue its investment in the construction of the ACP pipeline. See Notes 3 and 7 for further information.

Piedmont owns a 45% interest in Pine Needle, an interstate LNG storage facility located in North Carolina, and a 50% interest in Hardy Storage, an underground interstate natural gas storage facility located in West Virginia.

Duke Energy owns a 29.68% investment in SustainRNG, a developer of renewable natural gas projects, and a 70% interest in Sustain T&W, SustainRNG's renewable natural gas project located in Georgia.

DS Cornerstone, LLC, which owns wind farm projects in the U.S. was part of a sale of minority interest in a certain portion of renewable assets in 2019. See Note 1 for more information on the sale. Prior to the sale, Duke Energy had a 50% interest in DS Cornerstone, LLC. Subsequent to the sale, Duke Energy has a 26% interest in the investment.

In 2020, Duke Energy completed its acquisition of 70 distributed fuel cell projects from Bloom Energy Corporation, which approximates 43 MW of capacity serving commercial and industrial customers across the U.S. Duke Energy is not the primary beneficiary of the distributed fuel cell portfolio and does not consolidate these assets.

Duke Energy has a 17.5% indirect economic ownership interest and a 25% board representation and voting rights interest in NMC, which owns and operates a methanol and MTBE business in Jubail, Saudi Arabia.

For the year ended December 31, 2020, Duke Energy's investment in ACP met the requirements of S-X Rule 4-08(g) to provide summarized financial information. The following table provides summary information for ACP as required under S-X Rule 1-02(bb) for the period of significance and comparative prior year periods in Duke Energy's consolidated balance sheets and consolidated statements of operations. For the year ended December 31, 2021, there were no investments that met the significance requirements.


(in millions)			December 31, 2020

Current assets			$	43
Noncurrent assets			93
Current liabilities			1,965
Noncurrent liabilities			167

Membership interests			(1,996)

	Years Ended December 31,
	2020		2019
Net revenues	$	—	$	—
Operating loss	(4,612)		(5)

Net (loss) income	(4,512)		246

Net (loss) income attributable to Duke Energy	$	(2,121)	$	116