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Other Comprehensive Income (Tables) | 3 Months Ended
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Mar. 31, 2015
Statement of Comprehensive Income [Abstract] |
Other Comprehensive Income | The following table presents the tax effect allocated to each component of other comprehensive (loss) income for each period presented (in millions of dollars):
| Before-Tax |  | Income Tax |  | Net-of-Tax
| Amount |  | (Expense) Benefit 4 |  | Amount
Quarter Ended March 31, 2015 |  |  |  |  |
VEBAs: |  |  |  |  |
Reclassification adjustments: |  |  |  |  |
Amortization of net actuarial loss 1 | $ | 0.3 |  |  | $ | (0.1 | ) |  | $ | 0.2 |
Amortization of prior service cost 1 | 0.7 |  |  | (0.3 | ) |  | 0.4 |
Removal of obligation relating to Union VEBA | 106.6 |  |  | (40.4 | ) |  | 66.2 |
Other comprehensive income relating to VEBAs | 107.6 |  |  | (40.8 | ) |  | 66.8 |
Available for sale securities: |  |  |  |  |
Reclassification of unrealized gain upon sale of available for sale securities 2 | 0.1 |  |  | (0.1 | ) |  | — |
Other comprehensive income relating to available for sale securities | 0.1 |  |  | (0.1 | ) |  | — |
Foreign currency translation adjustment | 0.1 |  |  | — |  |  | 0.1 |
Other comprehensive income | $ | 107.8 |  |  | $ | (40.9 | ) |  | $ | 66.9 |
Quarter Ended March 31, 2014 |  |  |  |  |
VEBAs: |  |  |  |  |
Reclassification adjustments: |  |  |  |  |
Amortization of net actuarial (gain)2 | $ | (0.3 | ) |  | $ | 0.1 |  |  | $ | (0.2 | )
Amortization of prior service cost 2 | 2.8 |  |  | (1.0 | ) |  | 1.8 |
Other comprehensive income relating to VEBAs | 2.5 |  |  | (0.9 | ) |  | 1.6 |
Available for sale securities: |  |  |  |  |
Unrealized gains on available for sale securities | 0.1 |  |  | — |  |  | 0.1 |
Reclassification adjustments: |  |  |  |  |
Reclassification of unrealized loss upon sale of available for sale securities 3 | (0.1 | ) |  | — |  |  | (0.1 | )
Other comprehensive income relating to available for sale securities | — |  |  | — |  |  | — |
Foreign currency translation adjustment | 0.2 |  |  | — |  |  | 0.2 |
Cumulative tax rate adjustment | — |  |  | (0.9 | ) |  | (0.9 | )
Other comprehensive income | $ | 2.7 |  |  | $ | (1.8 | ) |  | $ | 0.9 |
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1 | Amounts reclassified out of Accumulated other comprehensive loss relating to VEBA adjustments were included as a component of Net periodic postretirement benefit loss (income) relating to the Salaried VEBA.
2 | Amounts reclassified out of Accumulated other comprehensive loss relating to VEBA adjustments were included as a component of Net periodic postretirement benefit loss (income) relating to both VEBAs.
3 | Amounts reclassified out of Accumulated other comprehensive loss relating to sales of available for sale securities were included as a component of Other income, net. We use the specific identification method to determine the amount reclassified out of Accumulated other comprehensive loss.
4 | Income tax amounts reclassified out of Accumulated other comprehensive loss relating to VEBA adjustments and sales of available for sale securities were included as a component of Income tax provision.

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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e526-108580 + Details
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