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Other Comprehensive (Loss) Income (Tables) | 12 Months Ended
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Dec. 31, 2015
Statement of Comprehensive Income [Abstract] |
Schedule of Other Comprehensive (Loss) Income | The following table presents the tax effect allocated to each component of other comprehensive income (loss) for each period presented (in millions of dollars):
|  |  | Income Tax |  |
| Before-Tax |  | (Expense) |  | Net-of-Tax
| Amount |  | Benefit 1 |  | Amount
2015 |  |  |  |  |
Defined benefit pension plan and VEBAs: |  |  |  |  |
Net actuarial loss arising during the period | $ | (12.9 | ) |  | $ | 4.9 |  |  | $ | (8.0 | )
Prior service credit arising during the period | 6.8 |  |  | (2.6 | ) |  | 4.2 |
Total actuarial loss and prior service costs | (6.1 | ) |  | 2.3 |  |  | (3.8 | )
Reclassification adjustments: |  |  |  |  |
Amortization of net actuarial loss 2 | 1.1 |  |  | (0.4 | ) |  | 0.7 |
Amortization of prior service cost 2 | 3.0 |  |  | (1.2 | ) |  | 1.8 |
Removal of obligation relating to Union VEBA | 106.6 |  |  | (40.2 | ) |  | 66.4 |
Other comprehensive income relating to defined benefit pension plan and VEBAs | 104.6 |  |  | (39.5 | ) |  | 65.1 |
Available for sale securities: |  |  |  |  |
Unrealized loss on available for sale securities | (0.1 | ) |  | — |  |  | (0.1 | )
Reclassification adjustments: |  |  |  |  |
Reclassification of unrealized gain upon sale of available for sale securities 3 | (0.4 | ) |  | 0.2 |  |  | (0.2 | )
Other comprehensive loss relating to available for sale securities | (0.5 | ) |  | 0.2 |  |  | (0.3 | )
Unrealized loss on foreign currency cash flow hedges | (0.3 | ) |  | 0.1 |  |  | (0.2 | )
Foreign currency translation loss | (0.2 | ) |  | — |  |  | (0.2 | )
Other comprehensive income | $ | 103.6 |  |  | $ | (39.2 | ) |  | $ | 64.4 |
2014 |  |  |  |  |
Defined benefit pension plan and VEBAs: |  |  |  |  |
Net actuarial loss arising during the period | $ | (39.0 | ) |  | $ | 14.5 |  |  | $ | (24.5 | )
Prior service cost arising during the period | (90.5 | ) |  | 33.8 |  |  | (56.7 | )
Total actuarial loss and prior service costs | (129.5 | ) |  | 48.3 |  |  | (81.2 | )
Reclassification adjustments: |  |  |  |  |
Amortization of net actuarial (gain)2 | (1.8 | ) |  | 0.7 |  |  | (1.1 | )
Amortization of prior service cost 2 | 10.6 |  |  | (3.9 | ) |  | 6.7 |
Other comprehensive loss relating to defined benefit pension plan and VEBAs | (120.7 | ) |  | 45.1 |  |  | (75.6 | )
Available for sale securities: |  |  |  |  |
Unrealized loss on available for sale securities | (0.2 | ) |  | 0.1 |  |  | (0.1 | )
Reclassification adjustments: |  |  |  |  |
Reclassification of unrealized gain upon sale of available for sale securities 3 | (0.1 | ) |  | — |  |  | (0.1 | )
Other comprehensive loss relating to available for sale securities | (0.3 | ) |  | 0.1 |  |  | (0.2 | )
Foreign currency translation gain | 0.4 |  |  | — |  |  | 0.4 |
Other comprehensive loss | $ | (120.6 | ) |  | $ | 45.2 |  |  | $ | (75.4 | )
|  |  | Income Tax |  |
| Before-Tax |  | (Expense) |  | Net-of-Tax
| Amount |  | Benefit 1 |  | Amount
2013 |  |  |  |  |
Defined benefit pension plan and VEBAs: |  |  |  |  |
Net actuarial gain arising during the period | $ | 87.0 |  |  | $ | (32.5 | ) |  | $ | 54.5 |
Prior service cost arising during the period | (84.8 | ) |  | 31.8 |  |  | (53.0 | )
Total actuarial gain and prior service costs | 2.2 |  |  | (0.7 | ) |  | 1.5 |
Reclassification adjustments: |  |  |  |  |
Amortization of net actuarial loss 2 | 1.5 |  |  | (0.5 | ) |  | 1.0 |
Amortization of prior service cost 2 | 4.2 |  |  | (1.6 | ) |  | 2.6 |
Other comprehensive income relating to defined benefit pension plan and VEBAs | 7.9 |  |  | (2.8 | ) |  | 5.1 |
Available for sale securities: |  |  |  |  |
Unrealized gain on available for sale securities | 1.0 |  |  | (0.3 | ) |  | 0.7 |
Reclassification adjustments: |  |  |  |  |
Reclassification of unrealized gain upon sale of available for sale securities 3 | (1.0 | ) |  | 0.3 |  |  | (0.7 | )
Other comprehensive income relating to available for sale securities | — |  |  | — |  |  | — |
Foreign currency translation gain | 0.2 |  |  | — |  |  | 0.2 |
Other comprehensive income | $ | 8.1 |  |  | $ | (2.8 | ) |  | $ | 5.3 |
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1. | 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 benefit (provision).
2. | Amounts reclassified out of Accumulated other comprehensive loss relating to VEBA adjustments were included as a component of Net periodic postretirement benefit cost (income) relating to 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 (expense) income, net. We use the specific identification method to determine the amount reclassified out of Accumulated other comprehensive loss.

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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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- References No definition available. + Details
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