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Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Class of Stock [Line Items] |  |
Preferred Stock, Value, Issued | $ 30.4 | $ 30.4
WEC Energy Group | $.01 pare value preferred stock |  |
Class of Stock [Line Items] |  |
Preferred Stock, Par or Stated Value Per Share | $ 0.01 | $ 0.01
Preferred Stock, Shares Authorized | 15,000,000 | 15,000,000
Preferred Stock, Shares Outstanding | 0 | 0
Preferred Stock, Value, Issued | $ 0.0 | $ 0.0
WE | Six per cent. preferred stock |  |
Class of Stock [Line Items] |  |
Preferred Stock, Par or Stated Value Per Share | $ 100 | $ 100
Preferred Stock, Dividend Rate, Percentage | 6.00% | 6.00%
Preferred Stock, Shares Authorized | 45,000 | 45,000
Preferred Stock, Shares Outstanding | 44,498 | 44,498
Preferred Stock, Redemption Price Per Share | $ 0 | $ 0
Preferred Stock, Value, Issued | $ 4.4 | $ 4.4
WE | Serial preferred stock, $100 par value; authorized 2,286,500 shares |  |
Class of Stock [Line Items] |  |
Preferred Stock, Par or Stated Value Per Share | $ 100 | $ 100
Preferred Stock, Shares Authorized | 2,286,500 | 2,286,500
WE | Serial preferred stock, 3.60% series redeemable |  |
Class of Stock [Line Items] |  |
Preferred Stock, Par or Stated Value Per Share | $ 100 | $ 100
Preferred Stock, Dividend Rate, Percentage | 3.60% | 3.60%
Preferred Stock, Shares Outstanding | 260,000 | 260,000
Preferred Stock, Redemption Price Per Share | $ 101 | $ 101
Preferred Stock, Value, Issued | $ 26.0 | $ 26.0
WE | Serial preferred stock, $25 par value; authorized 5,000,000 shares; none outstanding |  |
Class of Stock [Line Items] |  |
Preferred Stock, Par or Stated Value Per Share | $ 25 | $ 25
Preferred Stock, Shares Authorized | 5,000,000 | 5,000,000
Preferred Stock, Shares Outstanding | 0 | 0
Preferred Stock, Value, Issued | $ 0.0 | $ 0.0
WPS | $100 par value, preferred stock WPS |  |
Class of Stock [Line Items] |  |
Preferred Stock, Par or Stated Value Per Share | $ 100 | $ 100
Preferred Stock, Shares Authorized | 1,000,000 | 1,000,000
Preferred Stock, Shares Outstanding | 0 | 0
Preferred Stock, Value, Issued | $ 0.0 | $ 0.0
PGL | $100 par value, cumulative preferred stock PGL |  |
Class of Stock [Line Items] |  |
Preferred Stock, Par or Stated Value Per Share | $ 100 | $ 100
Preferred Stock, Shares Authorized | 430,000 | 430,000
Preferred Stock, Shares Outstanding | 0 | 0
Preferred Stock, Value, Issued | $ 0.0 | $ 0.0
NSG | $100 par value, cumulative preferred stock NSG |  |
Class of Stock [Line Items] |  |
Preferred Stock, Par or Stated Value Per Share | $ 100 | $ 100
Preferred Stock, Shares Authorized | 160,000 | 160,000
Preferred Stock, Shares Outstanding | 0 | 0
Preferred Stock, Value, Issued | $ 0.0 | $ 0.0

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- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644 + Details
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