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Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | $ (1,029.4) |
OCI before reclassifications | 236.1 |
Amounts reclassified from AOCI | 80.1 |
Net current-period OCI | 316.2 |
Ending balance | (713.2) |
Increase (Decrease) in Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |
Beginning balance | 23.7 |
OCI before reclassifications | 3.4 |
Amounts reclassified from AOCI | 0 |
Net current-period OCI | 3.4 |
Ending balance | 27.1 |
Post- retirement benefit plans [Member] |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | (1,030.0) |
OCI before reclassifications | 241.1 |
Amounts reclassified from AOCI | 70.0 | [1]
Net current-period OCI | 311.1 |
Ending balance | (718.9) |
Increase (Decrease) in Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |
Beginning balance | 0 |
OCI before reclassifications | 0 |
Amounts reclassified from AOCI | 0 |
Net current-period OCI | 0 |
Ending balance | 0 |
Currency translation adjustment [Member] |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | 3.4 |
OCI before reclassifications | 10.4 |
Amounts reclassified from AOCI | 1.5 | [2]
Net current-period OCI | 11.9 |
Ending balance | 15.3 |
Increase (Decrease) in Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |
Beginning balance | 23.7 |
OCI before reclassifications | 3.4 |
Amounts reclassified from AOCI | 0 | [3]
Net current-period OCI | 3.4 |
Ending balance | 27.1 |
Unrealized holding gains on securities [Member] |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | (0.1) |
OCI before reclassifications | 0.1 |
Amounts reclassified from AOCI | 0 | [3]
Net current-period OCI | 0.1 |
Ending balance | 0 |
Increase (Decrease) in Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |
Beginning balance | 0 |
OCI before reclassifications | 0 |
Amounts reclassified from AOCI | 0 |
Net current-period OCI | 0 |
Ending balance | 0 |
Derivatives [Member] |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | (2.7) |
OCI before reclassifications | (15.5) |
Amounts reclassified from AOCI | 8.6 | [4]
Net current-period OCI | (6.9) |
Ending balance | (9.6) |
Increase (Decrease) in Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |
Beginning balance | 0 |
OCI before reclassifications | 0 |
Amounts reclassified from AOCI | 0 |
Net current-period OCI | 0 |
Ending balance | $ 0 |
[1] | Amounts were included in net periodic benefit cost for pension and other postretirement benefit plans (see Note 10).
[2] | Amount was included in discontinued operations as part of the gain on sale of the tungsten materials business (see Note 2).
[3] | No amounts were reclassified to earnings.
[4] | Amounts were included in cost of goods sold in the period or periods the hedged item affects earnings (see Note 8).

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