LONG-TERM DEBT (Details) $ in Millions	1 Months Ended
Sep. 30, 2022 USD ($)
WE \| WE 4.75% Debentures due September 30, 2032
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 500.0
Interest rate on long-term debt	4.75%
WEC Energy Group \| WEC Senior Notes 5.00% due September 27, 2025
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 500.0
Interest rate on long-term debt	5.00%
WEC Energy Group \| WEC Senior Notes 5.15% due October 1, 2027
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 400.0
Interest rate on long-term debt	5.15%

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
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