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.


	Years Ended December 31,
	2020				2019				2018
			Equity in				Equity in				Equity in
(in millions)	Investments		earnings		Investments		earnings		Investments		earnings
Electric Utilities and Infrastructure	$	105	$	(1)	$	122	$	9	$	97	$	6
Gas Utilities and Infrastructure	215		(2,017)		1,388		114		1,003		27
Commercial Renewables	534		—		314		(4)		201		(1)
Other	107		13		112		43		108		51
Total	$	961	$	(2,005)	$	1,936	$	162	$	1,409	$	83

During the years ended December 31, 2020, 2019 and 2018, Duke Energy received distributions from equity investments of $37 million, $55 million and $108 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, 2020, 2019 and 2018, Duke Energy received distributions from equity investments of $133 million, $11 million and $137 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, 2020, 2019 and 2018, Piedmont received distributions from equity investments of $2 million, $1 million and $1 million, respectively, which are included in Other assets within Cash Flows from Operating Activities and $2 million, $4 million and $3 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.

The table below outlines Duke Energy's ownership interests in natural gas pipeline companies and natural gas storage facilities.


			Investment Amount (in millions)
	Ownership		December 31,
Entity Name	Interest		2020		2019
Pipeline Investments(a)
ACP(b)	47	%	$	—	$	1,179
Sabal Trail	7.5	%	120		121

Cardinal(c)	21.49	%	9		9
Storage Facilities
Pine Needle(c)	45	%	27		28
Hardy Storage(c)	50	%	56		51
Other	29.68	%	3		—
Total Investments(d)			$	215	$	1,388

(a) Duke Energy recorded OTTIs of $25 million and $55 million within Equity in (losses) earnings of unconsolidated affiliates on Duke Energy's Consolidated Statements of Operations for the years ended December 31, 2019, and 2018, respectively, to completely impair its 24% ownership interest in Constitution.

(b) 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.

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. After the sale, Duke Energy has a 26% interest in the investment.

As of December 31, 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 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 comparative periods in Duke Energy's consolidated balance sheets and consolidated statements of operations.


			December 31,
(in millions)			2020		2019
Current assets			$	43	$	17
Noncurrent assets			93		4,091
Current liabilities			1,965		37
Noncurrent liabilities			167		1,760

Membership interests			(1,996)		2,311

	Years Ended December 31,
	2020		2019		2018
Net revenues	$	—	$	—	$	—
Operating loss	(4,612)		(5)		(6)

Net (loss) income	(4,512)		246		138

Net (loss) income attributable to Duke Energy	$	(2,121)	$	116	$	65