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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Statement of Comprehensive Income [Abstract] |  |  |  |
Net loss | $ (13.9) | $ (0.7) | $ (1.3) | $ (18.6)
Currency translation adjustment |  |  |  |
Unrealized net change arising during the period | 19.3 | 7.7 | (2.5) | 4.4
Unrealized holding gain on securities |  |  |  |
Net gain (loss) arising during the period | (0.1) | 0.1 | (0.1) | 0.1
Derivatives |  |  |  |
Net derivatives gain (loss) on hedge transactions | (10.4) | 12.8 | 8.1 | 22.1
Reclassification to net loss of net realized loss (gain) | (2.1) | (0.5) | (4.8) | 1.6
Income taxes on derivative transactions | (4.8) | 4.7 | 1.3 | 9.1
Total | (7.7) | 7.6 | 2.0 | 14.6
Postretirement benefit plans |  |  |  |
Amortization of net actuarial loss | 18.7 | 22.0 | 37.4 | 44.0
Amortization to net loss of net prior service cost (credits) | 1.5 | (0.1) | 3.0 | (0.3)
Income taxes on postretirement benefit plans | 7.7 | 8.4 | 15.4 | 16.8
Total | 12.5 | 13.5 | 25.0 | 26.9
Other comprehensive income, net of tax | 24.0 | 28.9 | 24.4 | 46.0
Comprehensive income | 10.1 | 28.2 | 23.1 | 27.4
Less: Comprehensive income attributable to noncontrolling interests | 3.0 | 2.2 | 5.4 | 2.4
Comprehensive income attributable to ATI | $ 7.1 | $ 26.0 | $ 17.7 | $ 25.0

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