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Cover Page
Dec. 07, 2022
Cover [Abstract]  
Document Type 8-K
Document Period End Date Dec. 07, 2022
Entity File Number 001-09057
Entity Registrant Name WEC ENERGY GROUP, INC.
Entity Tax Identification Number 39-1391525
Entity Incorporation, State or Country Code WI
Entity Address, Address Line One 231 West Michigan Street
Entity Address, Address Line Two P.O. Box 1331
Entity Address, City or Town Milwaukee
Entity Address, State or Province WI
Entity Address, Postal Zip Code 53201
City Area Code 414
Local Phone Number 221-2345
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $.01 Par Value
Trading Symbol WEC
Security Exchange Name NYSE
Entity Emerging Growth Company false
Entity Central Index Key 0000783325
Amendment Flag false