Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The percentage rate used to calculate dividend payments on preferred stock.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of consolidated retained earnings that represent undistributed (not yet received) earnings from 50 percent or less owned persons accounted for by the equity method (equity method investees).

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Represents the common equity ratio which is required to be maintained

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Represents the percentage of common stockholders equity to total capitalization used as a threshold for dividend payment restrictions.

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Represents the number of periods for which interest payments on junior subordinated notes can be deferred.

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Represents the maximum debt to capitalization ratio.

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Represents the number of consecutive years for which interest payments on junior subordinated notes can be deferred.

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Minimum debt service ratio to be maintained for 12-months prior to distribution

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Percentage of net income for which dividends can be declared if certain common stock equity to total capitalization ratios are not maintained.

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Period needed to maintain minimum debt service coverage ratio

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Period for which dividends are restricted if criteria is not met.

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[Line Items] for Schedule itemizing dividend payment restrictions imposed by regulatory authorities.

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Common Equity - Dividend Restrictions (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) period	Dec. 31, 2021
Dividend Payment Restrictions
Junior notes minimum interest deferral payment period (in periods) \| period	1
Junior notes maximum interest payment deferral period (in years)	10 years
Restricted net assets of consolidated subsidiaries	$ 9,800
Undistributed earnings of investees accounted for by the equity method	$ 487
WE
Dividend Payment Restrictions
Maximum debt to capitalization ratio	65.00%
WE \| 3.60% Serial Preferred Stock
Dividend Payment Restrictions
Dividend rate (as a percent)	3.60%	3.60%
WE \| 3.60% Serial Preferred Stock \| Common stock equity to total capitalization is between 25% and 20%
Dividend Payment Restrictions
Period of dividend restrictions	12 months
WE \| 3.60% Serial Preferred Stock \| Common stock equity to total capitalization is less than 20%
Dividend Payment Restrictions
Period of dividend restrictions	12 months
WE \| 3.60% Serial Preferred Stock \| Minimum \| Common stock equity to total capitalization is between 25% and 20%
Dividend Payment Restrictions
Percentage of common equity to total capitalization required to be maintained	20.00%
WE \| 3.60% Serial Preferred Stock \| Maximum \| Common stock equity to total capitalization is between 25% and 20%
Dividend Payment Restrictions
Percentage of net income for which dividends can be declared	75.00%
Percentage of common equity to total capitalization required to be maintained	25.00%
WE \| 3.60% Serial Preferred Stock \| Maximum \| Common stock equity to total capitalization is less than 20%
Dividend Payment Restrictions
Percentage of net income for which dividends can be declared	50.00%
Percentage of common equity to total capitalization required to be maintained	20.00%
WE \| Public Service Commission of Wisconsin \| Minimum
Dividend Payment Restrictions
Common equity ratio required to be maintained (as a percent)	53.00%
WPS
Dividend Payment Restrictions
Maximum debt to capitalization ratio	65.00%
WPS \| Public Service Commission of Wisconsin \| Minimum
Dividend Payment Restrictions
Common equity ratio required to be maintained (as a percent)	53.00%
WG \| Public Service Commission of Wisconsin \| Minimum
Dividend Payment Restrictions
Common equity ratio required to be maintained (as a percent)	53.00%
UMERC
Dividend Payment Restrictions
Maximum debt to capitalization ratio	65.00%
Bluewater Gas Storage, LLC
Dividend Payment Restrictions
Maximum debt to capitalization ratio	65.00%
ATC Holding LLC
Dividend Payment Restrictions
Maximum debt to capitalization ratio	65.00%
WECI Wind Holding I
Dividend Payment Restrictions
Minimum debt service ratio to be maintained for 12-months prior to distribution	1.2
Period needed to maintain minimum debt service coverage ratio	12 months
WECI Wind Holding II
Dividend Payment Restrictions
Minimum debt service ratio to be maintained for 12-months prior to distribution	1.2
Period needed to maintain minimum debt service coverage ratio	12 months