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Pension Benefits and Postretirement Benefits Other Than Pensions (Tables) | 6 Months Ended
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Jun. 30, 2014
Pension Plans [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Defined Benefit Plans Disclosures [Table Text Block] | The components of Pension Expense for the six and three months ended June 30, 2014 and 2013 were:
|  | Six Months Ended |  | Three Months Ended
(Dollars in Millions) |  | Jun 30, 2014 |  | Jun 30, 2013 |  | Jun 30, 2014 |  | Jun 30, 2013
Service Cost Earned |  | $ | 4.4 |  |  | $ | 5.4 |  |  | $ | 2.2 |  |  | $ | 2.7 |
Interest Cost on Projected Benefit Obligation |  | 12.4 |  |  | 11.2 |  |  | 6.2 |  |  | 5.7 |
Expected Return on Plan Assets |  | (17.5 | ) |  | (14.9 | ) |  | (8.8 | ) |  | (7.5 | )
Amortization of Accumulated Unrecognized Actuarial Loss |  | 4.8 |  |  | 13.1 |  |  | 2.5 |  |  | 7.2 |
Total Pension Expense Recognized |  | $ | 4.1 |  |  | $ | 14.8 |  |  | $ | 2.1 |  |  | $ | 8.1 |
Postretirement Benefits Other than Pensions [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Defined Benefit Plans Disclosures [Table Text Block] | The components of Postretirement Benefits Other than Pensions Expense for the six and three months ended June 30, 2014 and 2013 were:
|  | Six Months Ended |  | Three Months Ended
(Dollars in Millions) |  | Jun 30, 2014 |  | Jun 30, 2013 |  | Jun 30, 2014 |  | Jun 30, 2013
Service Cost on Benefits Earned |  | $ | 0.1 |  |  | $ | 0.1 |  |  | $ | — |  |  | $ | — |
Interest Cost on Projected Benefit Obligation |  | 0.6 |  |  | 0.6 |  |  | 0.3 |  |  | 0.3 |
Amortization of Accumulated Unrecognized Actuarial Gain |  | (0.9 | ) |  | (0.6 | ) |  | (0.6 | ) |  | (0.3 | )
Total Postretirement Benefits Other than Pensions Expense |  | $ | (0.2 | ) |  | $ | 0.1 |  |  | $ | (0.3 | ) |  | $ | — |

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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2417-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=32704760&loc=d3e4179-114921 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2439-114920 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2410-114920 + Details
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