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Pension and Post-retirement Plans (Tables) | 6 Months Ended
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Jun. 30, 2012
Pension and Post retirement Plans [Abstract] |
Components of Net Periodic Benefit Cost |
|  | Pension Benefits |  | Post-retirement Benefits |
|  | 2012 |  | 2011 |  | 2012 |  | 2011 |
Service cost |  | $ | 1.3 |  | $ | 2.8 |  | $ | 0.4 |  | $ | 0.4 |
Interest cost |  | 4.5 |  | 5.4 |  | 1.1 |  | 1.4 |
Expected return on plan assets |  | (5.3 | ) | (5.6 | ) | — |  | — |
Amortization of prior service cost |  | (.7 | ) |  |  | — |  | 0.1 |
Amortization of net (gain) loss |  | 4.3 |  | 2.0 |  | 0.9 |  | 1.0 |
Net periodic benefit cost |  | $ | 4.1 |  | $ | 4.6 |  | $ | 2.4 |  | $ | 2.9 |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 715 -SubTopic 20 -Publisher FASB -Number -Article -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
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