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Earnings Per Share and Common Stock (Tables)

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

Reconciliation of Basic and Diluted Earnings Per Share

The difference between basic and diluted earnings per share, if any, arises from non-vested restricted stock units and performance share awards granted under our Executive Long-Term Incentive Compensation Plan.

Three Months Ended March 31,									2024																		2023
Reconciliation of Basic and Diluted									Dilutive																		Dilutive
Earnings Per Share			Basic						Securities						Diluted						Basic						Securities						Diluted
Millions Except Per Share Amounts
Net Income Attributable to ALLETE			$50.7												$50.7						$58.2												$58.2
Average Common Shares			57.6						0.1						57.7						57.3						—						57.3
Earnings Per Share			$0.88												$0.88						$1.02												$1.02

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- References

No definition available.

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482662/260-10-50-1

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