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Pension and Other Postretirement Benefits (Tables) | 3 Months Ended
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Mar. 31, 2012
General Discussion of Pension and Other Postretirement Benefits [Abstract] |
Schedule of Defined Benefit Plans Disclosures | Pension and other postretirement benefit costs included the following components for the three months ended March 31, 2012 and April 2, 2011:
| Pension Benefits |  | Other Postretirement Benefits
| Three Months Ended |  | Three Months Ended
(in millions) | March 31, 2012 |  | April 2, 2011 |  | March 31, 2012 |  | April 2, 2011
Service cost | $ | 0.1 |  |  | $ | 0.3 |  |  | $ | — |  |  | $ | 0.1 |
Interest cost | 14.4 |  |  | 15.6 |  |  | 0.7 |  |  | 0.9 |
Expected return on plan assets | (13.8 | ) |  | (13.3 | ) |  | — |  |  | — |
Amortization of prior service costs (credits) | — |  |  | 0.1 |  |  | (1.6 | ) |  | (1.0 | )
Amortization of net actuarial loss | 5.5 |  |  | 5.4 |  |  | 0.6 |  |  | 0.2 |
Net pension and other benefit costs | $ | 6.2 |  |  | $ | 8.1 |  |  | $ | (0.3 | ) |  | $ | 0.2 |

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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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