$WEC
WEC ENERGY GROUP, INC. Stock $wec

$wec Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000010781524000095 Filed on February 22, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$2.680B	$2.218B	$8.893B
YoY Change	-7.2%	-13.32%	-7.34%
Cost Of Revenue	$927.1M	$761.1M	$3.191B
YoY Change	-29.21%	-38.39%	-26.79%
Gross Profit	$1.753B	$1.456B	$5.702B
YoY Change	11.07%	10.08%	8.84%
Gross Profit Margin	65.41%	65.68%	64.12%
Selling, General & Admin			$5.900M
YoY Change
% of Gross Profit			0.1%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$333.4M	$324.5M	$1.264B
YoY Change	9.13%	14.02%	12.61%
% of Gross Profit	19.02%	22.28%	22.17%
Operating Expenses	$939.7M	$936.1M	$3.615B
YoY Change	3.37%	-0.69%	9.07%
Operating Profit	$813.4M	$520.3M	$1.908B
YoY Change	21.53%	36.78%	-0.84%
Interest Expense	$192.0M	-$148.1M	$726.9M
YoY Change	11.5%	42.54%	-326.87%
% of Operating Profit	23.6%	-28.46%	38.1%
Other Income/Expense, Net	-$103.1M	$46.80M	-$371.7M
YoY Change	17.69%	34.87%	-388.59%
Pretax Income	$710.3M	$240.1M	$1.536B
YoY Change	22.11%	-22.85%	-11.33%
Income Tax	$87.70M	$21.60M	$204.6M
% Of Pretax Income	12.35%	9.0%	13.32%
Net Earnings	$622.6M	$218.5M	$1.332B
YoY Change	22.66%	-13.53%	-5.43%
Net Earnings / Revenue	23.23%	9.85%	14.97%
Basic Earnings Per Share			$4.22
Diluted Earnings Per Share	$1.97	$0.69	$4.22
COMMON SHARES
Basic Shares Outstanding	315.6M shares		315.4M shares
Diluted Shares Outstanding	315.9M shares		315.9M shares

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments	$38.90M	$42.90M	$42.90M
YoY Change	8.96%	48.44%	48.44%
Cash & Equivalents	$38.90M	$42.90M	$42.90M
Short-Term Investments
Other Short-Term Assets	$400.1M	$474.4M	$474.4M
YoY Change	500.75%	-11.04%	-11.04%
Inventory	$608.6M	$775.2M	$775.2M
Prepaid Expenses
Receivables	$1.557B	$1.503B	$1.503B
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$2.605B	$2.796B	$2.796B
YoY Change	-8.24%	-12.3%	-12.3%
LONG-TERM ASSETS
Property, Plant & Equipment	$31.73B	$31.58B	$31.58B
YoY Change	4.45%	8.48%	8.48%
Goodwill	$3.053B	$3.053B
YoY Change	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments	$2.027B	$2.006B	$2.006B
YoY Change	5.48%	5.06%	5.06%
Other Assets	$4.513B	$4.504B	$4.504B
YoY Change	1164.12%	-2.27%	-2.27%
Total Long-Term Assets	$41.32B	$41.14B	$41.14B
YoY Change	3.42%	6.36%	6.36%
TOTAL ASSETS
Total Short-Term Assets	$2.605B	$2.796B	$2.796B
Total Long-Term Assets	$41.32B	$41.14B	$41.14B
Total Assets	$43.93B	$43.94B	$43.94B
YoY Change	2.64%	4.94%	4.94%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$640.9M	$896.6M	$896.6M
YoY Change	-5.75%	-25.16%	-25.16%
Accrued Expenses		$4.700M	$4.700M
YoY Change		17.5%	17.5%
Deferred Revenue
YoY Change
Short-Term Debt	$2.574B	$2.021B	$2.021B
YoY Change	104.11%	22.69%	22.69%
Long-Term Debt Due	$640.5M	$1.264B	$1.264B
YoY Change	-20.75%	43.46%	43.46%
Total Short-Term Liabilities	$4.710B	$5.115B	$5.115B
YoY Change	25.07%	10.93%	10.93%
LONG-TERM LIABILITIES
Long-Term Debt	$15.38B	$15.51B	$15.51B
YoY Change	-2.85%	5.06%	5.06%
Other Long-Term Liabilities	$6.296B	$6.322B	$6.322B
YoY Change	250.75%	1.11%	1.11%
Total Long-Term Liabilities	$21.67B	$21.83B	$21.83B
YoY Change	-19.86%	3.88%	3.88%
TOTAL LIABILITIES
Total Short-Term Liabilities	$4.710B	$5.115B	$5.115B
Total Long-Term Liabilities	$21.67B	$21.83B	$21.83B
Total Liabilities	$31.78B	$32.19B	$32.19B
YoY Change	3.17%	5.65%	5.65%
SHAREHOLDERS EQUITY
Retained Earnings	$7.972B	$7.613B
YoY Change	5.91%	4.78%
Common Stock	$4.149B	$4.119B
YoY Change	0.78%	0.02%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$12.14B	$11.75B	$11.75B
YoY Change
Total Liabilities & Shareholders Equity	$43.93B	$43.94B	$43.94B
YoY Change	2.64%	4.94%	4.94%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$622.6M	$218.5M	$1.332B
YoY Change	22.66%	-13.53%	-5.43%
Depreciation, Depletion And Amortization	$333.4M	$324.5M	$1.264B
YoY Change	9.13%	14.02%	12.61%
Cash From Operating Activities	$863.6M	$480.0M	$3.018B
YoY Change	8.48%	39900.0%	46.47%
INVESTING ACTIVITIES
Capital Expenditures	$444.5M	$763.4M	$2.732B
YoY Change	-10.99%	-220.52%	-217.05%
Acquisitions
YoY Change
Other Investing Activities	$8.300M	-$23.10M	-$826.2M
YoY Change	-11.7%	0.0%	167.99%
Cash From Investing Activities	-$436.2M	-$786.5M	-$3.558B
YoY Change	-65.6%	19.8%	34.66%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		-$2.600M	-$10.30M
YoY Change		550.0%	-71.07%
Debt Paid & Issued, Net	$756.9M		$1.005B
YoY Change	2050.28%		991.64%
Cash From Financing Activities	-476.5M	330.3M	522.8M
YoY Change	-214.1%	-54.22%	-22.71%
NET CHANGE
Cash From Operating Activities	863.6M	480.0M	3.018B
Cash From Investing Activities	-436.2M	-786.5M	-3.558B
Cash From Financing Activities	-476.5M	330.3M	522.8M
Net Change In Cash	-49.10M	23.80M	-17.00M
YoY Change	-9.41%	-64.05%	-117.95%
FREE CASH FLOW
Cash From Operating Activities	$863.6M	$480.0M	$3.018B
Capital Expenditures	$444.5M	$763.4M	$2.732B
Free Cash Flow	$419.1M	-$283.4M	$286.4M
YoY Change	41.25%	-144.66%	-93.48%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2023	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-1200000	usd
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CY2023Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1503200000	usd
CY2023Q4	us-gaap	Energy Related Inventory EnergyRelatedInventory	775200000	usd
CY2023Q4	us-gaap	Prepaid Taxes PrepaidTaxes	173900000	usd
CY2023Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	76800000	usd
CY2022Q4	us-gaap	Other Assets Current OtherAssetsCurrent	261700000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	3187700000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	10383800000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	29113800000	usd
CY2022Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	3264600000	usd
CY2022Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	1909200000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	3052800000	usd
CY2022Q4	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	916700000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	427300000	usd
CY2022Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	38684400000	usd
CY2022Q4	us-gaap	Assets Assets	41872100000	usd
CY2022Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	1647100000	usd
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	1198100000	usd
CY2022Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	884600000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	4625600000	usd
CY2022Q4	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	370700000	usd
CY2022Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	3735500000	usd
CY2022Q4	wec	Intangible Liabilities IntangibleLiabilities	335400000	usd
CY2023Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	374200000	usd
CY2023Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	659300000	usd
CY2023Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	4115900000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	7612800000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-7700000	usd
CY2023Q4	wec	Total Common Shareholders Equity TotalCommonShareholdersEquity	11724200000	usd
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue	30400000	usd
CY2023Q4	us-gaap	Other Minority Interests OtherMinorityInterests	316900000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	43939700000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	1331700000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1404500000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	14766200000	usd
CY2023Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	26753400000	usd
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	325000000	shares
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0000783325
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Amendment Flag AmendmentFlag	false
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CY2023	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2100500000	usd
CY2022	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1938000000	usd
CY2021	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2005500000	usd
CY2023	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	178900000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherAssetsNoncurrent
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CY2023Q4	us-gaap	Derivative Liability Noncurrent Statement Of Financial Position Extensible Enumeration DerivativeLiabilityNoncurrentStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherLiabilitiesNoncurrent
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CY2022Q4	us-gaap	Derivative Asset Noncurrent Statement Of Financial Position Extensible Enumeration DerivativeAssetNoncurrentStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherAssetsNoncurrent
CY2023Q4	us-gaap	Derivative Asset Noncurrent Statement Of Financial Position Extensible Enumeration DerivativeAssetNoncurrentStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherAssetsNoncurrent
CY2022	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost Credit Excluding Service Cost Statement Of Income Or Comprehensive Income Extensible List DefinedBenefitPlanNetPeriodicBenefitCostCreditExcludingServiceCostStatementOfIncomeOrComprehensiveIncomeExtensibleList	http://fasb.org/us-gaap/2023#OtherNonoperatingIncomeExpense
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CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023Q2	dei	Entity Public Float EntityPublicFloat	27800000000	usd
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	315561510	shares
CY2023	dei	Auditor Name AuditorName	DELOITTE & TOUCHE LLP
CY2023	dei	Auditor Location AuditorLocation	Milwaukee, Wisconsin
CY2023	us-gaap	Revenues Revenues	8893000000	usd
CY2022	us-gaap	Revenues Revenues	9597400000	usd
CY2021	us-gaap	Revenues Revenues	8316000000	usd
CY2023	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	3191200000	usd
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CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	3311000000	usd
CY2022	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	usd
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CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1264200000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1122600000	usd
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CY2022	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	253700000	usd
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CY2023	us-gaap	Costs And Expenses CostsAndExpenses	6985000000	usd
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CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	1714900000	usd
CY2023	wec	Income Loss From Equity Method Investments Of Transmission Affiliates IncomeLossFromEquityMethodInvestmentsOfTransmissionAffiliates	177500000	usd
CY2022	wec	Income Loss From Equity Method Investments Of Transmission Affiliates IncomeLossFromEquityMethodInvestmentsOfTransmissionAffiliates	194700000	usd
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CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-216100000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1732600000	usd
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CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.22
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CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	315400000	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	315400000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	315400000	shares
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	315900000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	316100000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	316300000	shares
CY2023	us-gaap	Profit Loss ProfitLoss	1331700000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	1409700000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	1298500000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	0	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	600000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	300000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	300000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-900000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-300000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-300000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	1500000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax	200000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax	1300000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax	-700000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	600000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	3500000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	-1700000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	0	usd
CY2022	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	200000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	400000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	600000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	3300000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-2100000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-900000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3600000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	3600000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1330800000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1406100000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1302100000	usd
CY2023	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1200000	usd
CY2022	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1200000	usd
CY2021	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1200000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	400000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-3000000.0	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1330800000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1303900000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	28900000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	199300000	usd
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1818400000	usd
CY2022Q4	us-gaap	Energy Related Inventory EnergyRelatedInventory	807100000	usd
CY2022Q4	us-gaap	Prepaid Taxes PrepaidTaxes	201800000	usd
CY2022Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	69800000	usd
CY2023Q4	us-gaap	Other Assets Current OtherAssetsCurrent	223700000	usd
CY2023Q4	us-gaap	Assets Current AssetsCurrent	2795700000	usd
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	11073100000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	31581500000	usd
CY2023Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	3249800000	usd
CY2023Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	2005900000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	3052800000	usd
CY2023Q4	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	870900000	usd
CY2023Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	383100000	usd
CY2023Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	41144000000	usd
CY2023Q4	us-gaap	Assets Assets	43939700000	usd
CY2023Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	2020900000	usd
CY2023Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	1264200000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	881200000	usd
CY2023Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	896600000	usd
CY2023Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	933100000	usd
CY2023Q4	us-gaap	Liabilities Current LiabilitiesCurrent	5114800000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	4611000000	usd
CY2023Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	15512800000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	4918500000	usd
CY2023Q4	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	356400000	usd
CY2023Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	3697700000	usd
CY2023Q4	wec	Intangible Liabilities IntangibleLiabilities	594800000	usd
CY2023Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	463700000	usd
CY2022Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	499600000	usd
CY2022Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	479300000	usd
CY2023Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	176000000.0	usd
CY2022Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	171600000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	660600000	usd
CY2022Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	25644500000	usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	325000000	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	315434531	shares
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	315434531	shares
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	3200000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	3200000	usd
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	4115200000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	7265300000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-6800000	usd
CY2022Q4	wec	Total Common Shareholders Equity TotalCommonShareholdersEquity	11376900000	usd
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	30400000	usd
CY2022Q4	us-gaap	Other Minority Interests OtherMinorityInterests	209300000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	41872100000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	1409700000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	1298500000	usd
CY2023	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1264200000	usd
CY2022	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1122600000	usd
CY2021	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1074300000	usd
CY2023	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	219400000	usd
CY2022	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	280100000	usd
CY2021	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	151100000	usd
CY2023	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	178900000	usd
CY2022	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	usd
CY2021	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	usd
CY2023	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	16700000	usd
CY2022	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	15100000	usd
CY2021	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	66300000	usd
CY2023	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	33000000.0	usd
CY2022	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	74300000	usd
CY2021	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	25100000	usd
CY2023	wec	Deferred Transmission Costs DeferredTransmissionCosts	-19800000	usd
CY2022	wec	Deferred Transmission Costs DeferredTransmissionCosts	85800000	usd
CY2021	wec	Deferred Transmission Costs DeferredTransmissionCosts	-5700000	usd
CY2023	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	23800000	usd
CY2022	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	66200000	usd
CY2021	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	6200000	usd
CY2023	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-340600000	usd
CY2022	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	342100000	usd
CY2021	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	249200000	usd
CY2023	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-41900000	usd
CY2022	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	171300000	usd
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	107200000	usd
CY2023	wec	Amounts Recoverable From Customers AmountsRecoverableFromCustomers	-17400000	usd
CY2022	wec	Amounts Recoverable From Customers AmountsRecoverableFromCustomers	-60000000.0	usd
CY2021	wec	Amounts Recoverable From Customers AmountsRecoverableFromCustomers	82300000	usd
CY2023	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	-22100000	usd
CY2022	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	108100000	usd
CY2021	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	-4600000	usd
CY2023	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-18900000	usd
CY2022	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	27700000	usd
CY2021	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-17600000	usd
CY2023	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-254000000.0	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	121500000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	126900000	usd
CY2023	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	47500000	usd
CY2022	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	126900000	usd
CY2021	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-17200000	usd
CY2023	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-156500000	usd
CY2022	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-169500000	usd
CY2021	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-92500000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3018400000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2060700000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2032700000	usd
CY2023	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	2492900000	usd
CY2022	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	2314900000	usd
CY2021	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	2252800000	usd
CY2023	wec	Payments For Assets Acquisition Three Net Of Cash Acquired PaymentsForAssetsAcquisitionThreeNetOfCashAcquired	76000000.0	usd
CY2022	wec	Payments For Assets Acquisition Three Net Of Cash Acquired PaymentsForAssetsAcquisitionThreeNetOfCashAcquired	0	usd
CY2021	wec	Payments For Assets Acquisition Three Net Of Cash Acquired PaymentsForAssetsAcquisitionThreeNetOfCashAcquired	0	usd
CY2023	us-gaap	Payments To Acquire Assets Investing Activities PaymentsToAcquireAssetsInvestingActivities	442600000	usd
CY2022	us-gaap	Payments To Acquire Assets Investing Activities PaymentsToAcquireAssetsInvestingActivities	0	usd
CY2021	us-gaap	Payments To Acquire Assets Investing Activities PaymentsToAcquireAssetsInvestingActivities	0	usd
CY2023	wec	Payments For Asset Acquisition Two Net Of Cash Acquired PaymentsForAssetAcquisitionTwoNetOfCashAcquired	257300000	usd
CY2022	wec	Payments For Asset Acquisition Two Net Of Cash Acquired PaymentsForAssetAcquisitionTwoNetOfCashAcquired	0	usd
CY2021	wec	Payments For Asset Acquisition Two Net Of Cash Acquired PaymentsForAssetAcquisitionTwoNetOfCashAcquired	0	usd
CY2023	wec	Payments For Assets Acquisition Four Net Of Cash Acquired PaymentsForAssetsAcquisitionFourNetOfCashAcquired	143800000	usd
CY2022	wec	Payments For Assets Acquisition Four Net Of Cash Acquired PaymentsForAssetsAcquisitionFourNetOfCashAcquired	0	usd
CY2021	wec	Payments For Assets Acquisition Four Net Of Cash Acquired PaymentsForAssetsAcquisitionFourNetOfCashAcquired	0	usd
CY2023	wec	Payments For Asset Acquisition Five Net Of Cash Acquired PaymentsForAssetAcquisitionFiveNetOfCashAcquired	95300000	usd
CY2022	wec	Payments For Asset Acquisition Five Net Of Cash Acquired PaymentsForAssetAcquisitionFiveNetOfCashAcquired	0	usd
CY2021	wec	Payments For Asset Acquisition Five Net Of Cash Acquired PaymentsForAssetAcquisitionFiveNetOfCashAcquired	0	usd
CY2023	wec	Payments For Asset Acquisition Six Net Of Cash Acquired PaymentsForAssetAcquisitionSixNetOfCashAcquired	0	usd
CY2022	wec	Payments For Asset Acquisition Six Net Of Cash Acquired PaymentsForAssetAcquisitionSixNetOfCashAcquired	382000000.0	usd
CY2021	wec	Payments For Asset Acquisition Six Net Of Cash Acquired PaymentsForAssetAcquisitionSixNetOfCashAcquired	0	usd
CY2023	wec	Payments For Asset Acquisition Seven Net Of Cash Acquired PaymentsForAssetAcquisitionSevenNetOfCashAcquired	0	usd
CY2022	wec	Payments For Asset Acquisition Seven Net Of Cash Acquired PaymentsForAssetAcquisitionSevenNetOfCashAcquired	0	usd
CY2021	wec	Payments For Asset Acquisition Seven Net Of Cash Acquired PaymentsForAssetAcquisitionSevenNetOfCashAcquired	119900000	usd
CY2023	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	63700000	usd
CY2022	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	45500000	usd
CY2021	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	0	usd
CY2023	us-gaap	Proceeds From Sales Of Business Affiliate And Productive Assets ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets	32800000	usd
CY2022	us-gaap	Proceeds From Sales Of Business Affiliate And Productive Assets ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets	69000000.0	usd
CY2021	us-gaap	Proceeds From Sales Of Business Affiliate And Productive Assets ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets	21900000	usd
CY2023	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	10400000	usd
CY2022	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	15400000	usd
CY2021	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	18700000	usd
CY2023	us-gaap	Payments For Advance To Affiliate PaymentsForAdvanceToAffiliate	19800000	usd
CY2022	us-gaap	Payments For Advance To Affiliate PaymentsForAdvanceToAffiliate	24800000	usd
CY2021	us-gaap	Payments For Advance To Affiliate PaymentsForAdvanceToAffiliate	7000000.0	usd
CY2023	us-gaap	Proceeds From Collection Of Other Receivables ProceedsFromCollectionOfOtherReceivables	100000	usd
CY2022	us-gaap	Proceeds From Collection Of Other Receivables ProceedsFromCollectionOfOtherReceivables	10200000	usd
CY2021	us-gaap	Proceeds From Collection Of Other Receivables ProceedsFromCollectionOfOtherReceivables	0	usd
CY2023	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	2500000	usd
CY2022	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	41600000	usd
CY2021	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	0	usd
CY2023	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	12600000	usd
CY2022	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	11400000	usd
CY2021	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-27300000	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3558200000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2642400000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2311800000	usd
CY2023	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	6300000	usd
CY2022	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	33600000	usd
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	15700000	usd
CY2023	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	16600000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	69200000	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	33100000	usd
CY2023	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	984200000	usd
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	917900000	usd
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	854800000	usd
CY2023	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2170000000	usd
CY2022	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1999300000	usd
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2383800000	usd
CY2023	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1005400000	usd
CY2022	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	92100000	usd
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1260400000	usd
CY2023	us-gaap	Repayments Of Other Short Term Debt RepaymentsOfOtherShortTermDebt	800000	usd
CY2022	us-gaap	Repayments Of Other Short Term Debt RepaymentsOfOtherShortTermDebt	0	usd
CY2021	us-gaap	Repayments Of Other Short Term Debt RepaymentsOfOtherShortTermDebt	340000000.0	usd
CY2023	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	373700000	usd
CY2022	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	-252600000	usd
CY2021	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	459200000	usd
CY2023	wec	Payments For Debt Extinguishment And Issuance Costs PaymentsForDebtExtinguishmentAndIssuanceCosts	14200000	usd
CY2022	wec	Payments For Debt Extinguishment And Issuance Costs PaymentsForDebtExtinguishmentAndIssuanceCosts	15600000	usd
CY2021	wec	Payments For Debt Extinguishment And Issuance Costs PaymentsForDebtExtinguishmentAndIssuanceCosts	67200000	usd
CY2023	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-6000000.0	usd
CY2022	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-9100000	usd
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-9200000	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	522800000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	676400000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	294000000.0	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-17000000.0	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	94700000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	14900000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	182200000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	87500000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	72600000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	165200000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	182200000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	87500000	usd
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10662500000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1300300000	usd
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-3000000.0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	3600000	usd
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.71
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	854800000	usd
CY2021	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	15700000	usd
CY2021	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	33100000	usd
CY2021	us-gaap	Noncontrolling Interest Increase From Business Combination NoncontrollingInterestIncreaseFromBusinessCombination	6300000	usd
CY2021	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	7600000	usd
CY2021	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	4100000	usd
CY2021	us-gaap	Stockholders Equity Other StockholdersEquityOther	-12300000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	11113300000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1408100000	usd
CY2022	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	400000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3600000	usd
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.91
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	917900000	usd
CY2022	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	33600000	usd
CY2022	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	69200000	usd
CY2022	us-gaap	Noncontrolling Interest Increase From Business Combination NoncontrollingInterestIncreaseFromBusinessCombination	42500000	usd
CY2022	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	1100000	usd
CY2022	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	4300000	usd
CY2022	us-gaap	Stockholders Equity Other StockholdersEquityOther	-12600000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	11616600000	usd
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1331700000	usd
CY2023	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-1200000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-900000	usd
CY2023	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.12
CY2023	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	984200000	usd
CY2023	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	6300000	usd
CY2023	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	16600000	usd
CY2023	us-gaap	Noncontrolling Interest Increase From Business Combination NoncontrollingInterestIncreaseFromBusinessCombination	114900000	usd
CY2023	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	6000000.0	usd
CY2023	us-gaap	Stockholders Equity Other StockholdersEquityOther	-10900000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	12071500000	usd
CY2023	us-gaap	Use Of Estimates UseOfEstimates	We make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results may differ from these estimates.
CY2023	wec	Maximum Term Of Original Maturity To Classify Instrument As Cash Equivalent MaximumTermOfOriginalMaturityToClassifyInstrumentAsCashEquivalent	P3M
CY2023Q4	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	327800000	usd
CY2022Q4	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	446300000	usd
CY2023Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	320000000.0	usd
CY2022Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	257000000.0	usd
CY2023Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	127400000	usd
CY2022Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	103800000	usd
CY2023Q4	us-gaap	Energy Related Inventory EnergyRelatedInventory	775200000	usd
CY2022Q4	us-gaap	Energy Related Inventory EnergyRelatedInventory	807100000	usd
CY2023Q4	us-gaap	Percentage Of Lifo Inventory PercentageOfLIFOInventory	0.17
CY2022Q4	us-gaap	Percentage Of Lifo Inventory PercentageOfLIFOInventory	0.13
CY2023Q4	us-gaap	Excess Of Replacement Or Current Costs Over Stated Lifo Value ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue	12200000	usd
CY2022Q4	us-gaap	Excess Of Replacement Or Current Costs Over Stated Lifo Value ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue	98300000	usd
CY2023Q4	wec	Natural Gas Price Benchmark NaturalGasPriceBenchmark	2.13
CY2022Q4	wec	Natural Gas Price Benchmark NaturalGasPriceBenchmark	3.41
CY2023	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Interest PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest	19500000	usd
CY2022	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Interest PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest	11000000.0	usd
CY2021	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Interest PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest	6800000	usd
CY2023	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	59100000	usd
CY2022	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	29400000	usd
CY2021	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	18000000.0	usd
CY2023Q4	us-gaap	Hosting Arrangement Service Contract Implementation Cost Capitalized Before Accumulated Amortization HostingArrangementServiceContractImplementationCostCapitalizedBeforeAccumulatedAmortization	11300000	usd
CY2022Q4	us-gaap	Hosting Arrangement Service Contract Implementation Cost Capitalized Before Accumulated Amortization HostingArrangementServiceContractImplementationCostCapitalizedBeforeAccumulatedAmortization	4700000	usd
CY2023Q4	us-gaap	Hosting Arrangement Service Contract Implementation Cost Capitalized Accumulated Amortization HostingArrangementServiceContractImplementationCostCapitalizedAccumulatedAmortization	2800000	usd
CY2022Q4	us-gaap	Hosting Arrangement Service Contract Implementation Cost Capitalized Accumulated Amortization HostingArrangementServiceContractImplementationCostCapitalizedAccumulatedAmortization	1500000	usd
CY2022	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	0	usd
CY2021	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	0	usd
CY2023	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	0	usd
CY2023	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	178900000	usd
CY2021Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	9000000	shares
CY2023Q4	wec	Minimum Lease Term To Recognize Right Of Use Asset And Lease Liabilities MinimumLeaseTermToRecognizeRightOfUseAssetAndLeaseLiabilities	P1Y
CY2023	us-gaap	Guarantees Indemnifications And Warranties Policies GuaranteesIndemnificationsAndWarrantiesPolicies	We follow the guidance of the Guarantees Topic of the FASB ASC, which requires, under certain circumstances, that the guarantor recognize a liability for the fair value of the obligation undertaken in issuing the guarantee at its inception. See Note 19, Guarantees, for more information.
CY2023	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	The geographic concentration of our customers did not contribute significantly to our overall exposure to credit risk. We periodically review customers' credit ratings, financial statements, and historical payment performance and require them to provide collateral or other security as needed. Credit risk exposure at WE, WPS, WG, PGL, and NSG is mitigated by their recovery mechanisms for uncollectible expense discussed in Note 1(d), Operating Revenues. As a result, we did not have any significant concentrations of credit risk at December 31, 2023. In addition, there were no customers that accounted for more than 10% of our revenues for the year ended December 31, 2023
CY2023	us-gaap	Revenues Revenues	8893000000	usd
CY2022	us-gaap	Revenues Revenues	9597400000	usd
CY2021	us-gaap	Revenues Revenues	8316000000	usd
CY2023Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	1696700000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	193500000	usd
CY2023Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	1503200000	usd
CY2023Q4	wec	Accounts Receivable Past Due Greaterthan90 Days AccountsReceivablePastDueGreaterthan90Days	98800000	usd
CY2023Q4	wec	Percentofaccountsreceivablepastduegreaterthan90dayswithregulatorymechanismstocollect Percentofaccountsreceivablepastduegreaterthan90dayswithregulatorymechanismstocollect	0.945
CY2022Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	2017700000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	199300000	usd
CY2022Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	1818400000	usd
CY2022Q4	wec	Accounts Receivable Past Due Greaterthan90 Days AccountsReceivablePastDueGreaterthan90Days	106700000	usd
CY2022Q4	wec	Percentofaccountsreceivablepastduegreaterthan90dayswithregulatorymechanismstocollect Percentofaccountsreceivablepastduegreaterthan90dayswithregulatorymechanismstocollect	0.968
CY2023Q4	wec	Amountofnetaccountsreceivablewithregulatoryprotections Amountofnetaccountsreceivablewithregulatoryprotections	914600000	usd
CY2023Q4	wec	Percentofnetaccountsreceivablewithregulatoryprotections Percentofnetaccountsreceivablewithregulatoryprotections	0.608
CY2023	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	72000000.0	usd
CY2023	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	223600000	usd
CY2023	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	57500000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	193500000	usd
CY2023	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	5800000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	198300000	usd
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	86100000	usd
CY2022	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	206000000.0	usd
CY2022	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	58000000.0	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	199300000	usd
CY2022	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	1000000	usd
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	220100000	usd
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	75700000	usd
CY2021	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	129800000	usd
CY2021	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	45400000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	198300000	usd
CY2023Q4	us-gaap	Regulatory Assets RegulatoryAssets	3274700000	usd
CY2022Q4	us-gaap	Regulatory Assets RegulatoryAssets	3306900000	usd
CY2023Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	24900000	usd
CY2022Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	42300000	usd
CY2023Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	3249800000	usd
CY2022Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	3264600000	usd
CY2023Q4	us-gaap	Regulatory Assets RegulatoryAssets	3274700000	usd
CY2022Q4	us-gaap	Regulatory Assets RegulatoryAssets	3306900000	usd
CY2023Q4	us-gaap	Public Utilities Amount Of Allowance For Earnings On Equity Capitalized For Rate Making Purposes PublicUtilitiesAmountOfAllowanceForEarningsOnEquityCapitalizedForRateMakingPurposes	26700000	usd
CY2022Q4	us-gaap	Public Utilities Amount Of Allowance For Earnings On Equity Capitalized For Rate Making Purposes PublicUtilitiesAmountOfAllowanceForEarningsOnEquityCapitalizedForRateMakingPurposes	27300000	usd
CY2023Q4	us-gaap	Remaining Amounts Of Regulatory Assets For Which No Return On Investment During Recovery Period Is Provided RemainingAmountsOfRegulatoryAssetsForWhichNoReturnOnInvestmentDuringRecoveryPeriodIsProvided	254600000	usd
CY2023Q4	wec	Remaining Amounts Of Regulatory Assets Earning Short Term Interest Rate Return On Investment RemainingAmountsOfRegulatoryAssetsEarningShortTermInterestRateReturnOnInvestment	5400000	usd
CY2023Q4	wec	Remaining Amounts Of Regulatory Assets Earning Long Term Interest Rate Return On Investment RemainingAmountsOfRegulatoryAssetsEarningLongTermInterestRateReturnOnInvestment	129700000	usd
CY2023Q4	wec	Remaining Amounts Of Regulatory Assets Earning Return On Equity Return On Investment RemainingAmountsOfRegulatoryAssetsEarningReturnOnEquityReturnOnInvestment	2500000	usd
CY2022Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	3791900000	usd
CY2023Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	47500000	usd
CY2022Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	56400000	usd
CY2023Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	3697700000	usd
CY2022Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	3735500000	usd
CY2023Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	3745200000	usd
CY2022Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	3791900000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	31581500000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	29113800000	usd
CY2022Q4	us-gaap	Restructuring Reserve RestructuringReserve	16200000	usd
CY2021Q4	us-gaap	Restructuring Reserve RestructuringReserve	4900000	usd
CY2020Q4	us-gaap	Restructuring Reserve RestructuringReserve	700000	usd
CY2023	us-gaap	Restructuring Charges RestructuringCharges	1600000	usd
CY2022	us-gaap	Restructuring Charges RestructuringCharges	11300000	usd
CY2021	us-gaap	Restructuring Charges RestructuringCharges	4600000	usd
CY2023	us-gaap	Payments For Restructuring PaymentsForRestructuring	0	usd
CY2022	us-gaap	Payments For Restructuring PaymentsForRestructuring	0	usd
CY2021	us-gaap	Payments For Restructuring PaymentsForRestructuring	400000	usd
CY2023Q4	us-gaap	Restructuring Reserve RestructuringReserve	17800000	usd
CY2022Q4	us-gaap	Restructuring Reserve RestructuringReserve	16200000	usd
CY2021Q4	us-gaap	Restructuring Reserve RestructuringReserve	4900000	usd
CY2022Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	479300000	usd
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	462000000.0	usd
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	513500000	usd
CY2023	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	17200000	usd
CY2022	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	16100000	usd
CY2021	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	21200000	usd
CY2023	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	24000000.0	usd
CY2022	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	12800000	usd
CY2021	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	31000000.0	usd
CY2023	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-133500000	usd
CY2022	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	2200000	usd
CY2021	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-84900000	usd
CY2023	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	12800000	usd
CY2022	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	13800000	usd
CY2021	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	18800000	usd
CY2023Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	374200000	usd
CY2022Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	479300000	usd
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	462000000.0	usd
CY2023	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	0	usd
CY2022	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	0	usd
CY2022Q4	us-gaap	Goodwill Goodwill	3052800000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	3052800000	usd
CY2023Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	0	usd
CY2023Q3	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2023Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	29300000	usd
CY2022Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	24900000	usd
CY2023	us-gaap	Adjustment For Amortization AdjustmentForAmortization	50600000	usd
CY2022	us-gaap	Adjustment For Amortization AdjustmentForAmortization	11300000	usd
CY2021	us-gaap	Adjustment For Amortization AdjustmentForAmortization	7500000	usd
CY2023	wec	Period Of Amortization PeriodOfAmortization	P5Y
CY2023	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9700000	usd
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	34800000	usd
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	15700000	usd
CY2023	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2700000	usd
CY2022	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	9600000	usd
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4300000	usd
CY2023Q4	us-gaap	Amount Of Restricted Net Assets For Consolidated And Unconsolidated Subsidiaries AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries	11400000000	usd
CY2023Q4	us-gaap	Retained Earnings Undistributed Earnings From Equity Method Investees RetainedEarningsUndistributedEarningsFromEquityMethodInvestees	525000000	usd
CY2021	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	0	shares
CY2022	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	0	shares
CY2023	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	0	shares
CY2023	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	200000	shares
CY2022	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	700000	shares
CY2021	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	400000	shares
CY2023	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	16600000	usd
CY2022	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	69200000	usd
CY2021	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	33100000	usd
CY2023Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.78
CY2023Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.78
CY2023Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.78
CY2023Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.78
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	30400000	usd
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue	30400000	usd
CY2023Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	3300000000	usd
CY2023Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	1280500000	usd
CY2023Q4	wec	Numberofextensionsavailableonacreditfacility Numberofextensionsavailableonacreditfacility	2	extension
CY2023	wec	Lengthofcreditfacilityextension Lengthofcreditfacilityextension	P1Y
CY2023Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	16724300000	usd
CY2022Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	15559800000	usd
CY2023Q4	wec	Integrys Fair Value Adjustment Long Term Debt IntegrysFairValueAdjustmentLongTermDebt	0	usd
CY2022Q4	wec	Integrys Fair Value Adjustment Long Term Debt IntegrysFairValueAdjustmentLongTermDebt	1200000	usd
CY2023Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	80200000	usd
CY2022Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	81800000	usd
CY2023Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	20500000	usd
CY2022Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	22300000	usd
CY2023Q4	us-gaap	Long Term Debt LongTermDebt	16631100000	usd
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	15464200000	usd
CY2023Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	1264200000	usd
CY2022Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	808500000	usd
CY2023Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	15366900000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	14655700000	usd
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	145900000	usd
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	183200000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1264200000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1264200000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	1685500000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	1726800000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1230700000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	2307200000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	8509900000	usd
CY2023Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	16724300000	usd
CY2023	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	0	usd
CY2022	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	6000000.0	usd
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	8100000	usd
CY2023	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	800000	usd
CY2022	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	900000	usd
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	1600000	usd
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	4700000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	6100000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	3400000	usd
CY2023	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1200000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	900000	usd
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	200000	usd
CY2023	us-gaap	Lease Cost LeaseCost	6700000	usd
CY2022	us-gaap	Lease Cost LeaseCost	13900000	usd
CY2021	us-gaap	Lease Cost LeaseCost	13300000	usd
CY2023	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	800000	usd
CY2022	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	900000	usd
CY2021	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	1600000	usd
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	6800000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	5700000	usd
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	5300000	usd
CY2023	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	0	usd
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	6000000.0	usd
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	8100000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	32800000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	57600000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	73600000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	18300000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	500000	usd
CY2023Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P49Y4M24D
CY2022Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P30Y
CY2021Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P20Y6M
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P22Y4M24D
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P12Y
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P12Y6M
CY2023Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.053
CY2022Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.039
CY2021Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.024
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.058
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.034
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.034
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	32000000.0	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	15700000	usd
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	133800000	usd
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	175300000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4700000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4000000.0	usd
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	38800000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	25400000	usd
CY2023Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	145900000	usd
CY2022Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	110500000	usd
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	6100000	usd
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	146300000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	6400000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	4800000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	5600000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	6100000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	5800000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	6200000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	5700000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	6300000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	5500000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	6500000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	71000000.0	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	468300000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	100000000.0	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	498200000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	56500000	usd
CY2023Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	352300000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	43500000	usd
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	145900000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4700000	usd
CY2023Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	0	usd
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	38800000	usd
CY2023Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	145900000	usd
CY2023	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-14800000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	50200000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	93900000	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	229900000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	278500000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	111000000.0	usd
CY2023	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	10500000	usd
CY2022	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	5800000	usd
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	4600000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	204600000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	322900000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	200300000	usd
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	322600000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	363500000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	315100000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2023	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	94300000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.061
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	109700000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.063
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	96100000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.064
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CY2023	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.109
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CY2022	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.062
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	81300000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.054
CY2023	wec	Income Tax Reconciliation Federal Excess Amortization IncomeTaxReconciliationFederalExcessAmortization	-37600000	usd
CY2023	wec	Effective Income Tax Reconciliation Federal Excess Amortization EffectiveIncomeTaxReconciliationFederalExcessAmortization	-0.024
CY2022	wec	Income Tax Reconciliation Federal Excess Amortization IncomeTaxReconciliationFederalExcessAmortization	-36900000	usd
CY2022	wec	Effective Income Tax Reconciliation Federal Excess Amortization EffectiveIncomeTaxReconciliationFederalExcessAmortization	-0.021
CY2021	wec	Income Tax Reconciliation Federal Excess Amortization IncomeTaxReconciliationFederalExcessAmortization	-37300000	usd
CY2021	wec	Effective Income Tax Reconciliation Federal Excess Amortization EffectiveIncomeTaxReconciliationFederalExcessAmortization	-0.025
CY2023	wec	Income Tax Reconciliation Allowance For Funds Used During Construction Capitalized Cost Of Equity IncomeTaxReconciliationAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	12400000	usd
CY2023	wec	Effective Income Tax Reconciliation Allowance For Funds Used During Construction Capitalized Cost Of Equity EffectiveIncomeTaxReconciliationAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	0.008
CY2022	wec	Income Tax Reconciliation Allowance For Funds Used During Construction Capitalized Cost Of Equity IncomeTaxReconciliationAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	6200000	usd
CY2022	wec	Effective Income Tax Reconciliation Allowance For Funds Used During Construction Capitalized Cost Of Equity EffectiveIncomeTaxReconciliationAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	0.004
CY2021	wec	Income Tax Reconciliation Allowance For Funds Used During Construction Capitalized Cost Of Equity IncomeTaxReconciliationAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	3800000	usd
CY2021	wec	Effective Income Tax Reconciliation Allowance For Funds Used During Construction Capitalized Cost Of Equity EffectiveIncomeTaxReconciliationAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	0.003
CY2023	wec	Income Tax Reconciliation Federal Excess Deferred Tax Amortization Wisconsin Unprotected IncomeTaxReconciliationFederalExcessDeferredTaxAmortizationWisconsinUnprotected	-800000	usd
CY2023	wec	Effective Income Tax Reconciliation Federal Excess Deferred Tax Amortization Wisconsin Unprotected EffectiveIncomeTaxReconciliationFederalExcessDeferredTaxAmortizationWisconsinUnprotected	-0.001
CY2022	wec	Income Tax Reconciliation Federal Excess Deferred Tax Amortization Wisconsin Unprotected IncomeTaxReconciliationFederalExcessDeferredTaxAmortizationWisconsinUnprotected	-800000	usd
CY2022	wec	Effective Income Tax Reconciliation Federal Excess Deferred Tax Amortization Wisconsin Unprotected EffectiveIncomeTaxReconciliationFederalExcessDeferredTaxAmortizationWisconsinUnprotected	0
CY2021	wec	Income Tax Reconciliation Federal Excess Deferred Tax Amortization Wisconsin Unprotected IncomeTaxReconciliationFederalExcessDeferredTaxAmortizationWisconsinUnprotected	-77900000	usd
CY2021	wec	Effective Income Tax Reconciliation Federal Excess Deferred Tax Amortization Wisconsin Unprotected EffectiveIncomeTaxReconciliationFederalExcessDeferredTaxAmortizationWisconsinUnprotected	-0.052
CY2023	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	6700000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.004
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1200000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-10600000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.006
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	204600000	usd
CY2023	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.133
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	322900000	usd
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.186
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	200300000	usd
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.134
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CY2022Q4	wec	Deferred Tax Assets Other Noncurrent DeferredTaxAssetsOtherNoncurrent	190200000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	852300000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	923700000	usd
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CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1200000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	847300000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	922500000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	4198000000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	4072500000	usd
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CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	5765800000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	5548100000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	4918500000	usd
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CY2023	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	200000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	300000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	usd
CY2023	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	400000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1600000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1900000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1200000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	6700000	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4600000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	6300000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	6800000	usd
CY2023Q4	wec	Deferred Tax Assets Uncertainty In Income Taxes DeferredTaxAssetsUncertaintyInIncomeTaxes	1100000	usd
CY2022Q4	wec	Deferred Tax Assets Uncertainty In Income Taxes DeferredTaxAssetsUncertaintyInIncomeTaxes	1300000	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	3600000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	5100000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	500000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	100000	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	500000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	100000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	400000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	-400000	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	600000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	500000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	100000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense	0	usd
CY2021	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense	0	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	0	usd
CY2023Q4	wec	Unrecognized Tax Benefits Decrease Resulting From Statute Of Limitations UnrecognizedTaxBenefitsDecreaseResultingFromStatuteOfLimitations	600000	usd
CY2023	us-gaap	Equity Securities Fv Ni Unrealized Gain EquitySecuritiesFvNiUnrealizedGain	10000000	usd
CY2021	us-gaap	Equity Securities Fv Ni Unrealized Gain EquitySecuritiesFvNiUnrealizedGain	16000000	usd
CY2022	us-gaap	Equity Securities Fv Ni Unrealized Loss EquitySecuritiesFvNiUnrealizedLoss	12700000	usd
CY2022Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	7800000	usd
CY2021Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	2400000	usd
CY2020Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	2400000	usd
CY2023	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Purchases FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchases	21000000.0	usd
CY2022	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Purchases FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchases	23700000	usd
CY2021	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Purchases FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchases	6100000	usd
CY2023	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings	-500000	usd
CY2022	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings	500000	usd
CY2021	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings	0	usd
CY2023	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	21100000	usd
CY2022	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	18800000	usd
CY2021	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	6100000	usd
CY2023Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	7200000	usd
CY2022Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	7800000	usd
CY2021Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	2400000	usd
CY2023	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Change In Unrealized Gain Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	500000	usd
CY2022	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Change In Unrealized Gain Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	-400000	usd
CY2021	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Change In Unrealized Gain Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	0	usd
CY2022Q4	us-gaap	Derivative Asset Fair Value Gross Liability And Obligation To Return Cash Offset DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset	17500000	usd
CY2022Q4	us-gaap	Derivative Liability Fair Value Gross Asset And Right To Reclaim Cash Offset DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset	82500000	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	14900000	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	35400000	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	57300000	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	14100000	usd
CY2023Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	67900000	usd
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1331700000	usd
CY2023	us-gaap	Segment Expenditure Addition To Long Lived Assets SegmentExpenditureAdditionToLongLivedAssets	3507900000	usd
CY2022Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	65000000	usd
CY2023Q4	us-gaap	Derivative Instruments And Hedges DerivativeInstrumentsAndHedges	17900000	usd
CY2023Q4	us-gaap	Hedging Liabilities Current HedgingLiabilitiesCurrent	89000000.0	usd
CY2022Q4	us-gaap	Derivative Instruments And Hedges DerivativeInstrumentsAndHedges	59200000	usd
CY2022Q4	us-gaap	Hedging Liabilities Current HedgingLiabilitiesCurrent	88200000	usd
CY2023Q4	us-gaap	Derivative Instruments And Hedges Noncurrent DerivativeInstrumentsAndHedgesNoncurrent	100000	usd
CY2023Q4	us-gaap	Derivative Instruments And Hedges Liabilities Noncurrent DerivativeInstrumentsAndHedgesLiabilitiesNoncurrent	17400000	usd
CY2022Q4	us-gaap	Derivative Instruments And Hedges Noncurrent DerivativeInstrumentsAndHedgesNoncurrent	15600000	usd
CY2022Q4	us-gaap	Derivative Instruments And Hedges Liabilities Noncurrent DerivativeInstrumentsAndHedgesLiabilitiesNoncurrent	8400000	usd
CY2023Q4	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	18000000.0	usd
CY2023Q4	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	106400000	usd
CY2022Q4	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	74800000	usd
CY2022Q4	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	96600000	usd
CY2023	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-233200000	usd
CY2022	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	311300000	usd
CY2021	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	154200000	usd
CY2023Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	100300000	usd
CY2022Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	122400000	usd
CY2023Q4	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	18000000.0	usd
CY2023Q4	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	106400000	usd
CY2022Q4	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	74800000	usd
CY2022Q4	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	96600000	usd
CY2023Q4	us-gaap	Derivative Asset Fair Value Gross Liability And Obligation To Return Cash Offset DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset	3100000	usd
CY2023Q4	us-gaap	Derivative Liability Fair Value Gross Asset And Right To Reclaim Cash Offset DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset	71000000.0	usd
CY2023Q4	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	167600000	usd
CY2023Q4	wec	Guarantee Obligations Maximum Exposure Expire Less Than One Year GuaranteeObligationsMaximumExposureExpireLessThanOneYear	58300000	usd
CY2023Q4	wec	Guarantee Obligations Maximum Exposure Expire Within One To Three Years GuaranteeObligationsMaximumExposureExpireWithinOneToThreeYears	0	usd
CY2023Q4	wec	Guarantee Obligations Maximum Exposure Expire Over Three Years GuaranteeObligationsMaximumExposureExpireOverThreeYears	109300000	usd
CY2023Q4	us-gaap	Assets Assets	43939700000	usd
CY2023	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	57500000	usd
CY2022	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	54400000	usd
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	51800000	usd
CY2023	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	6	numberofsegments
CY2023	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2100500000	usd
CY2023	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	178900000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1264200000	usd
CY2023	wec	Income Loss From Equity Method Investments Of Transmission Affiliates IncomeLossFromEquityMethodInvestmentsOfTransmissionAffiliates	177500000	usd
CY2023	us-gaap	Interest Expense InterestExpense	726900000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	204600000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	1331700000	usd
CY2022	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1938000000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1122600000	usd
CY2022	wec	Income Loss From Equity Method Investments Of Transmission Affiliates IncomeLossFromEquityMethodInvestmentsOfTransmissionAffiliates	194700000	usd
CY2022	us-gaap	Interest Expense InterestExpense	515100000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	322900000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	1409700000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1408100000	usd
CY2022	us-gaap	Segment Expenditure Addition To Long Lived Assets SegmentExpenditureAdditionToLongLivedAssets	2696900000	usd
CY2022Q4	us-gaap	Assets Assets	41872100000	usd
CY2021	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2005500000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1074300000	usd
CY2021	wec	Income Loss From Equity Method Investments Of Transmission Affiliates IncomeLossFromEquityMethodInvestmentsOfTransmissionAffiliates	158100000	usd
CY2021	us-gaap	Interest Expense InterestExpense	471100000	usd
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-36300000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	200300000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	1298500000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1300300000	usd
CY2021	us-gaap	Segment Expenditure Addition To Long Lived Assets SegmentExpenditureAdditionToLongLivedAssets	2372700000	usd
CY2021Q4	us-gaap	Assets Assets	38988500000	usd
CY2023Q4	us-gaap	Purchase Obligation PurchaseObligation	9657500000	usd
CY2023Q4	us-gaap	Purchase Obligation Due In Next Twelve Months PurchaseObligationDueInNextTwelveMonths	1448800000	usd
CY2023Q4	us-gaap	Purchase Obligation Due In Second Year PurchaseObligationDueInSecondYear	1178500000	usd
CY2023Q4	us-gaap	Purchase Obligation Due In Third Year PurchaseObligationDueInThirdYear	1028800000	usd
CY2023Q4	us-gaap	Purchase Obligation Due In Fourth Year PurchaseObligationDueInFourthYear	1028200000	usd
CY2023Q4	us-gaap	Purchase Obligation Due In Fifth Year PurchaseObligationDueInFifthYear	1031800000	usd
CY2023Q4	us-gaap	Purchase Obligation Due After Fifth Year PurchaseObligationDueAfterFifthYear	3941400000	usd
CY2023	us-gaap	Interest Paid Net InterestPaidNet	653400000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	485200000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	473800000	usd
CY2023	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-58900000	usd
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	52400000	usd
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	33800000	usd
CY2023	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	171300000	usd
CY2022	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	197400000	usd
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	127800000	usd
CY2023	wec	Receivable For Insurance Proceeds ReceivableForInsuranceProceeds	3500000	usd
CY2022	wec	Receivable For Insurance Proceeds ReceivableForInsuranceProceeds	0	usd
CY2021	wec	Receivable For Insurance Proceeds ReceivableForInsuranceProceeds	41700000	usd
CY2023	wec	Liabilities Accrued For Software Licensing Agreement LiabilitiesAccruedForSoftwareLicensingAgreement	0	usd
CY2022	wec	Liabilities Accrued For Software Licensing Agreement LiabilitiesAccruedForSoftwareLicensingAgreement	7400000	usd
CY2021	wec	Liabilities Accrued For Software Licensing Agreement LiabilitiesAccruedForSoftwareLicensingAgreement	0	usd
CY2023	wec	Sale Of Production Tax Credits Cash Received SaleOfProductionTaxCreditsCashReceived	75000000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	42900000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	28900000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	16300000	usd
CY2023Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	70100000	usd
CY2022Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	25600000	usd
CY2021Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	19600000	usd
CY2023Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	52200000	usd
CY2022Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	127700000	usd
CY2021Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	51600000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	165200000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	182200000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	87500000	usd
CY2023	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-97700000	usd
CY2022	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-104400000	usd
CY2021	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-72200000	usd
CY2023	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	59100000	usd
CY2022	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	29400000	usd
CY2021	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	18000000.0	usd
CY2023	us-gaap	Gain Loss On Investments GainLossOnInvestments	13700000	usd
CY2022	us-gaap	Gain Loss On Investments GainLossOnInvestments	-12600000	usd
CY2021	us-gaap	Gain Loss On Investments GainLossOnInvestments	18600000	usd
CY2023	wec	Other Unclassified Nonoperating Income Expense OtherUnclassifiedNonoperatingIncomeExpense	8300000	usd
CY2022	wec	Other Unclassified Nonoperating Income Expense OtherUnclassifiedNonoperatingIncomeExpense	-1700000	usd
CY2021	wec	Other Unclassified Nonoperating Income Expense OtherUnclassifiedNonoperatingIncomeExpense	4500000	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	177700000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	128800000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	133200000	usd
CY2023Q4	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
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CY2023Q4	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false
CY2023	dei	Auditor Firm AuditorFirmId	34
CY2022Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	199300000	usd
CY2023	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	72000000.0	usd
CY2023	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	88300000	usd
CY2023	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	166100000	usd
CY2023Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	193500000	usd
CY2021Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	198300000	usd
CY2022	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	86100000	usd
CY2022	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	62900000	usd
CY2022	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	148000000.0	usd
CY2022Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	199300000	usd
CY2020Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	220100000	usd
CY2021	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	107400000	usd
CY2021	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	-44800000	usd
CY2021	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	84400000	usd
CY2021Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	198300000	usd

Files In Submission

Name	View Source	Status
0000107815-24-000095-index-headers.html	Edgar Link	pending
0000107815-24-000095-index.html	Edgar Link	pending
0000107815-24-000095.txt	Edgar Link	pending
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$WEC
WEC ENERGY GROUP, INC. Stock $wec

2024 Q1 Form 10-K Financial Statement

#000010781524000095 Filed on February 22, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WEC WEC ENERGY GROUP, INC. Stock $wec

2024 Q1 Form 10-K Financial Statement

#000010781524000095 Filed on February 22, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WEC
WEC ENERGY GROUP, INC. Stock $wec