14. Accumulated Other Comprehensive Income (Loss) (1) Upon completion of the Acquisition on October 11, 2016, we recorded a loss of $458.3 million within special items, net upon reclassification of our accumulated other comprehensive loss related to our historical 42% interest in MillerCoors. The associated income tax benefit of $200.1 million was also reclassified and recorded as a component of the income tax benefit (expense) line item on the consolidated statement of operations. See  Note 4, "Acquisition and Investments"  for further details. The remaining AOCI of our equity method investments is related to changes to BRI and BDL pension obligations. (2) As a result of exiting our China business, the associated cumulative foreign currency translation adjustment was reclassified from AOCI and recognized within special items, net upon substantial liquidation. See  Note 7, "Special Items"  for further details. We have significant levels of net assets denominated in currencies other than the USD due to our operations in foreign countries, and therefore we recognize OCI gains and/or losses when those items are translated to USD. The foreign currency translation losses recognized during 2018 were due to the weakening of the CAD, GBP and other currencies of our Europe operations versus the USD. The foreign currency translation gains recognized during 2017 were due to the strengthening of MCBC stockholders' equity Foreign currency translation adjustments Gain (loss) on derivative instruments Pension and Postretirement Benefit adjustments Equity Method Investments Accumulated other comprehensive income (loss) (In millions) As of December 31, 2015 $ (769.9 ) $ 14.5 $ (598.3 ) $ (350.4 ) $ (1,704.1 ) Foreign currency translation adjustments (227.4) — (7.3) — (234.7) Unrealized gain (loss) on derivative instruments — 20.0 — — 20.0 Reclassification of derivative (gain) loss to income — (3.4) — — (3.4) Pension and other postretirement benefit adjustments — — 64.4 — 64.4 Amortization of net prior service (benefit) cost and net actuarial (gain) loss to income and settlement — — 28.9 — 28.9 Reclassification of historical share of MillerCoors' AOCI loss to income (1) — — — 458.3 458.3 Ownership share of unconsolidated subsidiaries' other comprehensive income (loss) (1) — — — 36.8 36.8 Tax benefit (expense) (1) 3.2 (9.9 ) (16.7 ) (214.6 ) (238.0 ) As of December 31, 2016 $ (994.1) $ 21.2 $ (529.0) $ (69.9) $ (1,571.8) Foreign currency translation adjustments 638.3 — 4.7 — 643.0 Unrealized gain (loss) on derivative and non-derivative instruments — (205.3) — — (205.3) Reclassification of derivative (gain) loss to income — 2.0 — — 2.0 Pension and other postretirement benefit adjustments — — 181.8 — 181.8 Amortization of net prior service (benefit) cost and net actuarial (gain) loss to income and settlement — — 4.4 — 4.4 Ownership share of unconsolidated subsidiaries' other comprehensive income (loss) — — — 14.3 14.3 Tax benefit (expense) 41.2 71.2 (36.9 ) (3.9 ) 71.6 As of December 31, 2017 $ (314.6) $ (110.9) $ (375.0) $ (59.5) $ (860.0) Foreign currency translation adjustments (411.6 ) 106.4 (0.6 ) — (305.8 ) Reclassification of cumulative translation adjustment to income  (2) 6.0 — — — 6.0 Unrealized gain (loss) on derivative instruments — 14.5 — — 14.5 Reclassification of derivative (gain) loss to income — 3.4 — — 3.4 Pension and other postretirement benefit adjustments — — 55.4 — 55.4 Amortization of net prior service (benefit) cost and net actuarial (gain) loss to income and settlement — — 6.5 — 6.5 Ownership share of unconsolidated subsidiaries' other comprehensive income (loss) — — — (1.0 ) (1.0 ) Tax benefit (expense) (24.5) (31.2) (13.5) 0.2 (69.0) As of December 31, 2018 $ (744.7 ) $ (17.8 ) $ (327.2 ) $ (60.3 ) $ (1,150.0 ) 135