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v3.6.0.2

Dispositions (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Dispositions |  |  |  |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal |  |  | $ 19.6 | $ 22.9 | $ 7.5
Wisconsin | WE |  |  |  |  |
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract] |  |  |  |  |
DisposalGroupNotDiscontinuedOperationsAftertaxGainLossOnDisposal | $ 6.5 |  |  |  |
Corporate and Other | Wisvest [Member] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract] |  |  |  |  |
DisposalGroupNotDiscontinuedOperationsAftertaxGainLossOnDisposal | 11.8 |  |  |  |
Corporate and Other | ITF |  |  |  |  |
Dispositions |  |  |  |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal |  | $ 0.0 |  |  |
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract] |  |  |  |  |
Accounts receivable and unbilled revenues |  |  |  | 37.2 |
Materials, supplies, and inventories |  |  |  | 34.9 |
Other current assets |  |  |  | 18.4 |
Property, plant, and equipment |  |  |  | 2.6 |
Other long-term assets |  |  |  | 3.7 |
Total assets |  |  |  | 96.8 |
Accounts payable |  |  |  | 12.9 |
Accrued payroll and benefits |  |  |  | 2.4 |
Other current liabilities |  |  |  | 4.5 |
Pension and OPEB obligations |  |  |  | 1.2 |
Other long-term liabilities |  |  |  | 0.6 |
Total liabilities |  |  |  | $ 21.6 |
Operating Expense [Member] | Wisconsin | WE |  |  |  |  |
Dispositions |  |  |  |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal | 10.9 |  |  |  |
Other Income [Member] | Corporate and Other | Wisvest [Member] |  |  |  |  |
Dispositions |  |  |  |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal | $ 19.6 |  |  |  |

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