Medicare Prescription Drug Improvement and Modernization Act of 2003 (“the Act”) because the prescription drug benefits provided under the Company's postretirement health plan for Medicare eligible retirees generally require lower premiums from covered retirees and have lower co- payments and deductibles than the benefits provided in Medicare Part D and, accordingly, are actuarially equivalent to or better than the benefits provided under the Act. The benefits paid, including prescription drugs, were $37.1 million in 2018, $36.6 million in 2017 and $9.0 million for the post-Acquisition period of October 11, 2016, through December 31, 2016. Subsidies of $0.3 million for both 2018 and 2017, and $0.1 million for the post-Acquisition period of October 11, 2016, through December 31, 2016, were received. As a result of the Acquisition, MillerCoors' results of operations became fully consolidated by MCBC, and, therefore, for the year ended December 31, 2016, the consolidated statement of operations includes MillerCoors' pension and OPEB expenses attributable to the period from October 11, 2016, to December 31, 2016. MillerCoors' pension and OPEB plans were recorded at fair value upon close of the Acquisition. We have adopted the FASB's new guidance related to the classification of defined benefit pension and other postretirement plan costs. Specifically, the new guidance requires us to report only the service cost component in the same line item as other compensation costs arising from services rendered by the pertinent employees during the period; while the other components of net benefit cost are now presented in the consolidated statements of operations separately from the service cost component and outside of operating income. We have also determined that only service cost will be reported within each operating segment and all other components will be reported within the Corporate segment. See further discussion in  Note 2, "New Accounting Pronouncements." Defined Benefit and OPEB Plans 137 Net Periodic Pension and OPEB Cost (Benefit) For the years ended December 31, 2018 December 31, 2017 December 31, 2016 Pension OPEB Consolidated Pension OPEB Consolidated Pension OPEB Consolidated (In millions) Service cost: Service cost $ 5.5 $ 9.3 $ 14.8 $ 7.7 $ 10.9 $ 18.6 $ 7.6 $ 4.1 $ 11.7 Other pension and postretirement costs (benefits), net: Interest cost 161.8 25.8 187.6 205.6 30.6 236.2 146.4 10.9 157.3 Expected return on plan assets, net of expenses (232.8 ) 0.5 (232.3 ) (287.9 ) 0.4 (287.5 ) (194.1 ) — (194.1 ) Amortization of prior service cost (benefit) 0.7 (0.2) 0.5 0.5 — 0.5 0.7 (0.1) 0.6 Amortization of net actuarial loss (gain) 7.6 (1.7 ) 5.9 12.2 — 12.2 17.8 — 17.8 Curtailment, settlement or special termination benefit loss (gain) 0.8 0.1 0.9 (5.4) (2.9) (8.3) 10.5 — 10.5 Less: expected participant contributions (0.8 ) — (0.8 ) (0.5 ) — (0.5 ) (0.5 ) — (0.5 ) Total other pension and postretirement cost (benefits), net $ (62.7) $ 24.5 $ (38.2) $ (75.5) $ 28.1 $ (47.4) $ (19.2) $ 10.8 $ (8.4) Net periodic pension and OPEB cost (benefit) $ (57.2) $ 33.8 $ (23.4) $ (67.8) $ 39.0 $ (28.8) $ (11.6) $ 14.9 $ 3.3