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Statements of Consolidated Comprehensive Income (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Statement of Comprehensive Income [Abstract] |  |  |  |  |  |  |  |
Net income | $ 15.9 |  | $ 25.4 |  | $ 56.2 |  | $ 77.5 |
Reclassification adjustments: |  |  |  |  |  |  |  |
Amortization of net actuarial (gain) loss | (0.5) | [1] | 0.3 | [1] | (1.4) | [1] | 1.0 | [1]
Amortization of prior service cost | 2.6 | [1] | 1.0 | [1] | 8.0 | [1] | 3.1 | [1]
Other comprehensive income relating to VEBAs | 2.1 |  | 1.3 |  | 6.6 |  | 4.1 |
Available for sale securities: |  |  |  |  |  |  |  |
Unrealized gain on available for sale securities | (0.2) |  | 0.4 |  | 0.1 |  | 0.9 |
Reclassification adjustments: |  |  |  |  |  |  |  |
Reclassification of unrealized gain upon sale of available for sale securities | 0 | [2] | (0.2) | [2] | (0.2) | [2] | (0.8) | [2]
Other comprehensive income (loss) relating to available for sale securities | (0.2) |  | 0.2 |  | (0.1) |  | 0.1 |
Foreign currency translation adjustment | 0.1 |  | (0.3) |  | 0.2 |  | 0.5 |
Other comprehensive income, before tax | 2.0 |  | 1.2 |  | 6.7 |  | 4.7 |
Income tax expense related to items of other comprehensive income | (0.7) | [3] | (0.6) | [3] | (2.4) | [3] | (1.6) | [3]
Other comprehensive income, net of tax | 1.3 |  | 0.6 |  | 4.3 |  | 3.1 |
Comprehensive income | $ 17.2 |  | $ 26.0 |  | $ 60.5 |  | $ 80.6 |
[1] | Amounts reclassified out of Accumulated other comprehensive income relating to VEBA adjustments were included as a component of Net periodic pension benefit income relating to VEBAs.
[2] | Amounts reclassified out of Accumulated other comprehensive income relating to sales of available for sale securities were included as a component of Other income (expense), net. The Company uses the specific identification method to determine the amount reclassified out of accumulated other comprehensive income.
[3] | Income tax amounts reclassified out of Accumulated other comprehensive income relating to VEBA adjustments and sales of available for sale securities were included as a component of Income tax provision.

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