Business Segments (Tables)

6 Months Ended

Jun. 30, 2023

Segment Reporting [Abstract]

Business Segments [Table Text Block]

	Quarter Ended		Six Months Ended
	June 30		June 30
	2023	2022	2023	2022
Millions
Operating Revenue
Regulated Operations
Residential	$36.0	$40.6	$85.4	$96.6
Commercial	44.0	44.4	91.7	92.7
Municipal	7.6	10.0	16.5	22.1
Industrial	140.2	150.6	285.1	298.4
Other Power Suppliers	36.3	36.9	72.2	77.9
Other	28.1	26.2	53.9	50.0
Total Regulated Operations	292.2	308.7	604.8	637.7
ALLETE Clean Energy
Long-term PSA	13.2	18.9	31.6	44.3
Sale of Wind Energy Facilities	166.6	—	348.4	—
Other	1.3	2.3	2.6	5.1
Total ALLETE Clean Energy	181.1	21.2	382.6	49.4
Corporate and Other
Long-term Contract	23.9	21.4	49.4	44.0
Sale of Renewable Development Projects	32.6	14.5	52.4	14.5
Other	3.6	7.3	9.1	11.0
Total Corporate and Other	60.1	43.2	110.9	69.5
Total Operating Revenue	$533.4	$373.1	$1,098.3	$756.6
Net Income Attributable to ALLETE
Regulated Operations	$37.8	$29.6	$78.4	$81.1
ALLETE Clean Energy	3.1	5.8	11.6	22.3
Corporate and Other (a)	10.6	2.2	19.7	0.5
Total Net Income Attributable to ALLETE	$51.5	$37.6	$109.7	$103.9

(a)Net Income in 2022 includes a $4.0 million after-tax expense as a result of purchase price accounting related to projects under development at the time of acquisition and $3.0 million after-tax of transaction costs related to the acquisition of New Energy.

	June 30, 2023	December 31, 2022
Millions
Assets
Regulated Operations	$4,259.8	$4,291.4
ALLETE Clean Energy	1,557.9	1,873.3
Corporate and Other	750.2	680.9
Total Assets	$6,567.9	$6,845.6