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Common Equity - Dividend Restrictions (Details) $ in Millions | 12 Months Ended
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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 |

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- Definition Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(e)(3)(ii)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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