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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2016
Valuation and Qualifying Accounts [Abstract] |
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS | SCHEDULE II WEC ENERGY GROUP, INC. VALUATION AND QUALIFYING ACCOUNTS
Allowance for Doubtful Accounts (in millions) |  | Balance at Beginning of Period |  | Acquisitions of Businesses |  | Expense (1) |  | Deferral |  | Net Write-offs (2) |  | Balance at End of Period
December 31, 2016 |  | $ | 113.3 |  |  | $ | — |  |  | $ | 87.4 |  |  | $ | (5.9 | ) |  | $ | (86.8 | ) |  | $ | 108.0 |
December 31, 2015 |  | 74.5 |  |  | 54.3 |  |  | 56.7 |  |  | 8.2 |  |  | (80.4 | ) |  | 113.3 |
December 31, 2014 |  | 61.0 |  |  | — |  |  | 49.8 |  |  | 18.4 |  |  | (54.7 | ) |  | 74.5 |
(1) | Net of recoveries.
(2) | Represents amounts written off to the reserve, net of adjustments to regulatory assets.

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- References No definition available. + Details
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