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Employee Benefits (Tables) | 6 Months Ended
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Jun. 30, 2013
Compensation and Retirement Disclosure [Abstract] |
Schedule of (Income) Charges Related to Benefit Plans | The following table presents the components of net periodic pension benefit income for the VEBAs and charges relating to all other employee benefit plans for the quarter and six months ended June 30, 2013 and June 30, 2012:
| Quarter Ended |  | Six Months Ended
| June 30, |  | June 30,
| 2013 |  | 2012 |  | 2013 |  | 2012
VEBAs: |  |  |  |  |  |  |
Service cost | $ | 0.7 |  |  | $ | 0.9 |  |  | $ | 1.3 |  |  | $ | 1.7 |
Interest cost | 3.7 |  |  | 4.5 |  |  | 7.3 |  |  | 9.0 |
Expected return on plan assets | (11.5 | ) |  | (10.2 | ) |  | (22.7 | ) |  | (20.3 | )
Amortization of prior service cost | 1.0 |  |  | 1.1 |  |  | 2.1 |  |  | 2.1 |
Amortization of net actuarial loss | 0.4 |  |  | 0.7 |  |  | 0.7 |  |  | 1.5 |
Total net periodic pension benefit income relating to VEBAs | (5.7 | ) |  | (3.0 | ) |  | (11.3 | ) |  | (6.0 | )
Deferred compensation plan | — |  |  | 0.1 |  |  | 0.4 |  |  | 0.5 |
Defined contribution plans | 1.3 |  |  | 1.6 |  |  | 5.3 |  |  | 5.0 |
Multiemployer pension plans | 0.9 |  |  | 0.9 |  |  | 1.7 |  |  | 1.7 |
Total | $ | (3.5 | ) |  | $ | (0.4 | ) |  | $ | (3.9 | ) |  | $ | 1.2 |
Allocation of (Income) Charges Relating to Benefit Plans by Segment | The following table presents the allocation of the (income) charges detailed above, by segment (see Note 12):
| Quarter Ended |  | Six Months Ended
| June 30, |  | June 30,
| 2013 |  | 2012 |  | 2013 |  | 2012
Fabricated Products | $ | 2.0 |  |  | $ | 2.4 |  |  | $ | 6.6 |  |  | $ | 6.4 |
All Other | (5.5 | ) |  | (2.8 | ) |  | (10.5 | ) |  | (5.2 | )
Total | $ | (3.5 | ) |  | $ | (0.4 | ) |  | $ | (3.9 | ) |  | $ | 1.2 |

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- Definition Allocation of costs relating to retirement plans + References No definition available. + Details
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- Definition Tabular disclosure of the costs related to the various types of retirement plans including defined benefit pension plan cost, defined contribution plan cost, other postretirement benefit plan cost, and net periodic benefit cost. + 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 + Details
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