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Reclassificiations out of Accumulated Other Comprehensive Income (Loss) (Tables) | 6 Months Ended
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Jun. 30, 2013
Reclassifications Out of Accumualted Other Comprehensive Income (Loss) [Abstract] |
Changes in Accumulated Other Comprehensive Loss by Component [Table Text Block] | Changes in Accumulated Other Comprehensive Loss by Component
| Unrealized Gains and Losses on Available-for-sale Securities (a) | Defined Benefit Pension, Other Postretirement Items (a) | Gains and Losses on Cash Flow Hedge (a) | Total (a)
Millions |  |  |  |
For the Quarter Ended June 30, 2013 |  |  |  |
Beginning Balance | $(0.1) | $(21.2) | $(0.3) | $(21.6)
Other Comprehensive Income (Loss) Before Reclassifications | 0.1 |  | (2.6 | ) | — |  | (2.5 | )
Amounts Reclassified From Accumulated Other Comprehensive Loss | — |  | 3.1 |  | — |  | 3.1 |
Net Other Comprehensive Income | 0.1 |  | 0.5 |  | — |  | 0.6 |
Ending Balance | — |  | $(20.7) | $(0.3) | $(21.0)
For the Six Months Ended June 30, 2013 |  |  |  |
Beginning Balance | $(0.1) | $(21.5) | $(0.4) | $(22.0)
Other Comprehensive Income (Loss) Before Reclassifications | 0.6 |  | (5.5 | ) | 0.1 |  | (4.8 | )
Amounts Reclassified From Accumulated Other Comprehensive Loss | (0.5 | ) | 6.3 |  | — |  | 5.8 |
Net Other Comprehensive Income | 0.1 |  | 0.8 |  | 0.1 |  | 1.0 |
Ending Balance | — |  | $(20.7) | $(0.3) | $(21.0)
(a) | Amounts shown are net of tax.
Reclassifications Out of Accumulated Other Comprehensive Loss [Table Text Block] | Reclassifications Out of Accumulated Other Comprehensive Loss
Details About Accumulated Other Comprehensive Loss Components | Amount Reclassified from Accumulated Other Comprehensive Loss (a) |  | Affected Income Statement Line Item
Millions |  |  |
For the Quarter Ended June 30, 2013 |  |  |
Amortization of Defined Benefit Pension and Other Postretirement Items |  |  |
Prior Service Costs |  | $0.7 |  |  | (b)
Actuarial Gains and Losses | (5.8 | ) |  | (b)
| (5.1 | ) |  |
| 2.0 |  |  | Income Tax Expense
| $(3.1) |  |
Total Reclassifications | $(3.1) |  |
For the Six Months Ended June 30, 2013 |  |  |
Unrealized Gains on Available-for-sale Securities |  | $0.8 |  |  | Other Income (Expense) - Other
| (0.3 | ) |  | Income Tax Expense
|  | $0.5 |  |  |
Amortization of Defined Benefit Pension and Other Postretirement Items |  |  |
Prior Service Costs |  | $1.2 |  |  | (b)
Actuarial Gains and Losses | (11.5 | ) |  | (b)
| (10.3 | ) |  |
| 4.0 |  |  | Income Tax Expense
| $(6.3) |  |
Total Reclassifications | $(5.8) |  |
(a) | Amounts in parentheses indicate charges to net income.
(b) | These components of accumulated other comprehensive loss are included in the computation of net pension and other postretirement benefit expense. (See Note 13. Pension and Other Postretirement Benefit Plans.)

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- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669686-108580 + Details
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