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GENERAL INFORMATION - GENERAL (Details) customer in Millions	Mar. 31, 2024 customer
Electric
Product information [Line Items]
Number Of Customers	1.7
Natural gas
Product information [Line Items]
Number Of Customers	3.0

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Definition

The number of customers served by the entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	wec_
Data Type:	xbrli:integerItemType
Balance Type:	na
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X

- Details

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Namespace Prefix:
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Period Type:

X

- Details

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Namespace Prefix:
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