Expansion, Incorporated sponsors an unfunded postretirement plan providing health care benefits. The following information relates to the current year's activity of Expansion's postretirement benefit plan: Service cost $ 120 million Interest cost 40 million Amortization of net gain-AOCI 10 million Prior service cost-AOCI none Retiree benefits paid (end of year) 35 million What is Expansion's postretirement benefit expense