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Business Segments (Tables)

6 Months Ended

Jun. 30, 2021

Segment Reporting [Abstract]

Business Segments [Table Text Block]

			Quarter Ended									Six Months Ended
			June 30,									June 30,
			2021			2020						2021			2020
Millions
Operating Revenue
Regulated Operations
Residential			$35.4			$27.4						$81.0			$68.3
Commercial			40.7			28.8						80.4			66.1
Municipal			11.5			9.0						24.1			19.3
Industrial			139.1			88.0						268.1			206.8
Other Power Suppliers			37.3			27.4						75.7			65.7
Other			26.4			20.2						54.1			39.9
Total Regulated Operations			290.4			200.8						583.4			466.1
ALLETE Clean Energy
Long-term PSA			18.7			14.8						36.8			32.1
Other			2.9			2.8						5.7			5.6
Total ALLETE Clean Energy			21.6			17.6						42.5			37.7
Corporate and Other
Long-term Contract			21.4			22.5						43.1			44.9
Other			2.2			2.3						5.8			6.1
Total Corporate and Other			23.6			24.8						48.9			51.0
Total Operating Revenue			$335.6			$243.2						$674.8			$554.8
Net Income Attributable to ALLETE
Regulated Operations			$21.5			$11.1						$66.5			$68.6
ALLETE Clean Energy			5.1			4.0						12.5			15.7
Corporate and Other			1.3			5.0						0.7			2.1
Total Net Income Attributable to ALLETE			$27.9			$20.1						$79.7			$86.4

			June 30, 2021			December 31, 2020
Millions
Assets
Regulated Operations			$4,200.1			$4,196.8
ALLETE Clean Energy			1,653.5			1,483.3
Corporate and Other			439.7			404.5
Total Assets			$6,293.3			$6,084.6

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- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 25
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8813-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599

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- References

No definition available.

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