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Short-Term Debt and Lines of Credit (Tables) | 12 Months Ended
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Dec. 31, 2016
Short-term Debt [Abstract] |
Short-term notes payable balances and their corresponding weighted-average interest rates | The following table shows our short-term borrowings and their corresponding weighted-average interest rates as of December 31:
(in millions, except percentages) |  | 2016 |  | 2015
Commercial paper |  |  |  |
Amount outstanding at December 31 |  | $ | 860.2 |  |  | $ | 1,095.0 |
Average interest rate on amounts outstanding at December 31 |  | 0.96 | % |  | 0.68 | %
Schedule of revolving credit facilities | The information in the table below relates to our revolving credit facilities used to support our commercial paper borrowing program, including remaining available capacity under these facilities as of December 31:
(in millions) |  | Maturity |  | 2016
WEC Energy Group |  | December 2020 |  | $ | 1,050.0 |
WE |  | December 2020 |  | 500.0 |
WPS |  | December 2020 |  | 250.0 |
WG |  | December 2020 |  | 350.0 |
PGL |  | December 2020 |  | 350.0 |
Total short-term credit capacity |  |  |  | $ | 2,500.0 |
Less: |  |  |  |  |
Letters of credit issued inside credit facilities |  |  |  | $ | 19.1 |
Commercial paper outstanding |  |  |  | 860.2 |
Available capacity under existing agreements |  |  |  | $ | 1,620.7 |

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- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Tabular disclosure of short-term debt arrangements (having initial terms of repayment within one year or the normal operating cycle, if longer) including: (1) description of the short-term debt arrangement; (2) identification of the lender or type of lender; (3) repayment terms; (4) weighted average interest rate; (5) carrying amount of funds borrowed under the specified short-term debt arrangement as of the balance sheet date; (6) description of the refinancing of a short-term obligation when that obligation is excluded from current liabilities in the balance sheet; and (7) amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation. + 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 210.5-02.19) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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