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Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Comprehensive income (loss) [Abstract] |  |  |  |  |  |
Net earnings | $ 769.2 |  | $ 50.0 |  | $ 71.9 |
Foreign currency translation [Abstract] |  |  |  |  |  |
Foreign currency translation adjustments arising during period | (6.7) |  | 6.4 |  | (4.2) |
Less: reclassification of foreign currency translation included in Net earnings | (0.7) |  | 0 |  | (16.2) |
Net foreign currency translation | (7.4) | [1] | 6.4 | [1] | (20.4) | [1]
Defined benefit plans [Abstract] |  |  |  |  |  |
Prior service credits arising during period | 0 |  | 0.2 |  | 6.1 |
Net actuarial gains (losses) arising during period | 145.4 |  | (30.0) |  | (122.7) |
Less: amortization of prior service credits included in Net earnings | (7.0) |  | (7.5) |  | (5.9) |
Less: amortization of net actuarial losses included in Net earnings | 23.2 |  | 22.9 |  | 22.4 |
Net defined benefit plans | 161.6 | [2] | (14.4) | [2] | (100.1) | [2]
Investments [Abstract] |  |  |  |  |  |
Unrealized holding gains (losses) arising during period | 0 |  | 0.1 |  | (1.0) |
Less: reclassification adjustment included in Net earnings | 0 |  | 0 |  | 0.2 |
Net unrealized investment gains (losses) | 0 | [1] | 0.1 | [1] | (0.8) | [1]
Derivatives [Abstract] |  |  |  |  |  |
Losses on derivatives arising during the period | (5.3) |  | (10.0) |  | (9.8) |
Less: reclassification adjustment included in Net earnings | 4.7 |  | 3.6 |  | 5.8 |
Net unrealized losses on derivatives | (0.6) | [1] | (6.4) | [1] | (4.0) | [1]
Other comprehensive income (loss) | 153.6 |  | (14.3) |  | (125.3) |
Comprehensive income (loss) | 922.8 |  | 35.7 |  | (53.4) |
Other comprehensive income (loss), tax effect | $ (0.2) | [2] | $ (0.9) | [2] | $ (0.3) | [2]
[1] | Pre-tax and after-tax amounts are substantially the same as the Company maintained a tax valuation allowance for these items for all periods presented until its reversal at December 31, 2013. See Note 11 – Income Taxes and Note 18 – Comprehensive Income for additional details.
[2] | The tax effect for the years ended December 31, 2013, 2012 and 2011 to Other comprehensive income (loss) was $(0.2) million, $(0.9) million and $(0.3) million, respectively, primarily related to certain foreign defined benefit plans as all other defined benefit plans included corresponding tax valuation allowance adjustments.

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