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Other Income (Expense) | 9 Months Ended
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Sep. 30, 2015
Other Income (Expense) [Abstract] |
Other Income (Expense) [Text Block] | OTHER INCOME (EXPENSE)
|  | Quarter Ended |  |  | Nine Months Ended
|  | September 30, |  |  | September 30,
|  | 2015 |  | 2014 |  | 2015 |  | 2014
Millions |  |  |  |  |  |  |  |
AFUDC–Equity |  |  | $1.0 |  |  |  | $2.1 |  |  |  | $2.6 |  |  |  | $5.9 |
Gain on Sale of Available-for-sale Securities |  | — |  |  | — |  |  | 0.1 |  |  | 0.2 |
Investments and Other Income (Expense) |  | 0.7 |  |  | — |  |  | 0.8 |  |  | (0.1 | )
Total Other Income |  |  | $1.7 |  |  |  | $2.1 |  |  |  | $3.5 |  |  |  | $6.0 |

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- Definition Other Income (Expense) [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3,6,7,9) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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