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Pension Plans and Other Postretirement Benefits (Tables) | 9 Months Ended
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Sep. 30, 2013
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract] |
Schedule Of Defined Benefit Plans Disclosures | For the three month periods ended September 30, 2013 and 2012, the components of pension expense and components of other postretirement benefit expense for the Company’s defined benefit plans included the following (in millions):
| Pension Benefits |  | Other Postretirement Benefits
| Three months ended September 30, |  | Three months ended September 30,
| 2013 |  | 2012 |  | 2013 |  | 2012
Service cost - benefits earned during the year | $ | 10.0 |  |  | $ | 8.8 |  |  | $ | 0.8 |  |  | $ | 0.8 |
Interest cost on benefits earned in prior years | 30.3 |  |  | 33.1 |  |  | 5.6 |  |  | 6.5 |
Expected return on plan assets | (43.8 | ) |  | (45.4 | ) |  | (0.1 | ) |  | (0.2 | )
Amortization of prior service cost (credit) | 0.8 |  |  | 1.6 |  |  | (4.6 | ) |  | (4.5 | )
Amortization of net actuarial loss | 29.2 |  |  | 26.3 |  |  | 4.3 |  |  | 3.6 |
Total retirement benefit expense | $ | 26.5 |  |  | $ | 24.4 |  |  | $ | 6.0 |  |  | $ | 6.2 |
For the nine month periods ended September 30, 2013 and 2012, the components of pension expense and components of other postretirement benefit expense for the Company’s defined benefit plans included the following (in millions):
| Pension Benefits |  | Other Postretirement Benefits
| Nine months ended September 30, |  | Nine months ended September 30,
| 2013 |  | 2012 |  | 2013 |  | 2012
Service cost - benefits earned during the year | $ | 30.0 |  |  | $ | 26.3 |  |  | $ | 2.4 |  |  | $ | 2.4 |
Interest cost on benefits earned in prior years | 90.9 |  |  | 99.3 |  |  | 16.8 |  |  | 19.5 |
Expected return on plan assets | (131.4 | ) |  | (136.1 | ) |  | (0.3 | ) |  | (0.6 | )
Amortization of prior service cost (credit) | 2.3 |  |  | 4.8 |  |  | (13.7 | ) |  | (13.6 | )
Amortization of net actuarial loss | 87.6 |  |  | 78.9 |  |  | 12.9 |  |  | 10.9 |
Total retirement benefit expense | $ | 79.4 |  |  | $ | 73.2 |  |  | $ | 18.1 |  |  | $ | 18.6 |

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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=21915506&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=21915506&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=21916443&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=21915506&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=21915506&loc=d3e2410-114920 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5, 6, 7 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 4, 7, 16, 20, 21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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