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Other Comprehensive Income | 3 Months Ended
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Mar. 31, 2015
Statement of Comprehensive Income [Abstract] |
Other Comprehensive Income Disclosure | Other Comprehensive (Loss) 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 The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e681-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e689-108580 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669619-108580 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e640-108580 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e716-108580 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e709-108580 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Reclassification Adjustments -URI http://asc.fasb.org/extlink&oid=6522872 + Details
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