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Pensions and Other Postretirement Benefits (Tables) | 9 Months Ended
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Sep. 30, 2012
Pensions and Other Postretirement Benefits [Abstract] |
Components of net annual benefit cost (income) | The following table summarizes the components of net annual benefit cost (income) for the three and nine months ended September 30, 2012 and 2011:
(in Millions) | Three Months Ended September 30 |  | Nine Months Ended September 30
Pensions |  | Other Benefits |  | Pensions |  | Other Benefits
2012 |  | 2011 |  | 2012 |  | 2011 |  | 2012 |  | 2011 |  | 2012 |  | 2011
Components of net annual benefit cost (income): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | 5.1 |  |  | $ | 4.6 |  |  | $ | — |  |  | $ | — |  |  | $ | 15.2 |  |  | $ | 14.4 |  |  | $ | 0.1 |  |  | $ | 0.2 |
Interest cost | 15.6 |  |  | 15.3 |  |  | 0.4 |  |  | 0.3 |  |  | 46.1 |  |  | 46.1 |  |  | 1.0 |  |  | 1.5 |
Expected return on plan assets | (19.0 | ) |  | (20.6 | ) |  | — |  |  | — |  |  | (57.4 | ) |  | (61.8 | ) |  | — |  |  | — |
Amortization of prior service cost (credit) | 0.4 |  |  | 0.5 |  |  | — |  |  | (0.4 | ) |  | 1.5 |  |  | 1.5 |  |  | (0.1 | ) |  | (0.6 | )
Recognized net actuarial and other (gain) loss | 11.9 |  |  | 8.9 |  |  | (0.8 | ) |  | (0.5 | ) |  | 38.4 |  |  | 27.3 |  |  | (1.8 | ) |  | (0.7 | )
Net periodic benefit cost from continuing operations | $ | 14.0 |  |  | $ | 8.7 |  |  | $ | (0.4 | ) |  | $ | (0.6 | ) |  | $ | 43.8 |  |  | $ | 27.5 |  |  | $ | (0.8 | ) |  | $ | 0.4 |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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