Investments

12 Months Ended

Dec. 31, 2021

Schedule of Equity Method Investments [Line Items]

Investments

INVESTMENTS

Unconsolidated Equity Investments - Alliant Energy’s unconsolidated investments accounted for under the equity method of accounting are as follows (in millions):

	Ownership Interest at	Carrying Value at December 31,		Equity (Income) / Loss
	December 31, 2021	2021	2020	2021	2020	2019
ATC Holdings	16%, 20%	$338	$331	($43)	($47)	($45)
Non-utility wind farm in Oklahoma	50%	99	103	(4)	(8)	(5)
Corporate venture investments	Various	52	31	(13)	(4)	(1)
Other	Various	19	11	(2)	(2)	(2)
		$508	$476	($62)	($61)	($53)

Summary aggregate financial information from the financial statements of these holdings is as follows (in millions):

	Alliant Energy
	2021	2020	2019
Revenues	$802	$801	$783
Operating income	357	376	359
Net income	358	343	340
As of December 31:
Current assets	112	121
Non-current assets	7,036	6,388
Current liabilities	455	317
Non-current liabilities	3,110	2,997
Noncontrolling interest	247	192

ATC Holdings - As of December 31, 2021, Alliant Energy has a 16% ownership interest in ATC and a 20% ownership interest in ATC Holdco LLC, collectively referred to as ATC Holdings. ATC is an independent, for-profit, transmission-only company. ATC Holdco LLC holds Duke-American Transmission Company, LLC, a joint venture between Duke Energy Corporation and ATC, that owns electric transmission infrastructure in North America.

Non-utility Wind Farm in Oklahoma - The non-utility wind farm located in Oklahoma provides electricity to a third-party under a long-term PPA, and has both cash and tax equity ownership. Alliant Energy does not maintain or operate the wind farm, and provided a parent guarantee of its subsidiary’s indemnification obligations under the operating agreement and PPA. Refer to Note 17(d) for discussion of the guarantee.

Corporate Venture Investments - Alliant Energy has various minority ownership interests in regional and national venture funds, including a coalition with different energy companies across the U.S., working together to help identify and research innovative products, technologies and business models within the emerging energy economy.