Investments (Tables)

3 Months Ended

Mar. 31, 2023

Schedule of Equity Method Investments [Line Items]

Unconsolidated Equity Investments

Alliant Energy’s equity (income) loss from unconsolidated investments accounted for under the equity method of accounting for the three months ended March 31 was as follows (in millions):

	2023	2022
ATC Holdings	($13)	($11)
Other	(4)	(4)
	($17)	($15)