Table of Contents Unallocated Segment Cost of goods sold Interest income (expense), net Liquidity and Capital Resources N/M = Not meaningful The unrealized changes in fair value on our commodity swaps, which are economic hedges, are recorded as cost of goods sold within unallocated and make up the entirety of the activity presented with cost of goods sold in the table above for 2020, 2019 and 2018. As the exposure we are managing is realized, we reclassify the gain or loss to the segment in which the underlying exposure resides, allowing our segments to realize the economic effects of the derivative without the resulting unrealized mark-to-market volatility. See Part II—Item 8 Financial Statements and Supplementary Data,  Note 16, "Derivative Instruments and Hedging Activities"  for further information. Net interest expense decreased in 2020 compared to 2019, primarily driven by the repayment of debt as part of our deleveraging commitments. See Part II—Item 8 Financial Statements and Supplementary Data,  Note 11, "Debt"  for further details. Other pension and postretirement benefits were $30.3 million for the year ended 2020 compared to $2.9 million in 2019, primarily driven by a pension settlement charge of $29.8 million recognized in 2019. See Part II—Item 8 Financial Statements and Supplementary Data,  Note 15, "Employee Retirement Plans and Postretirement Benefits"  for further discussion of other pension and postretirement benefits. Our primary sources of liquidity have included cash provided by operating activities and access to external capital. However, the  worldwide economic disruption caused by the coronavirus pandemic could materially affect our future access to our sources of liquidity. In the event of a sustained market deterioration and continued declines in net sales, profit and operating cash flow, we may need additional liquidity, which would require us to evaluate available alternatives and take appropriate actions.  We currently believe that our cash and cash equivalents, cash flows from operations and cash provided by short-term and long-term borrowings, when necessary, will be adequate to meet our ongoing operating requirements, scheduled principal and interest payments on debt, capital expenditures and other obligations for the next twelve months, and our long-term liquidity requirements. Additionally, in the second quarter of 2020, as part of our planned actions to mitigate liquidity considerations related to the coronavirus pandemic, we amended our $1.5 billion revolving credit facility to revise the leverage ratios under the financial maintenance covenant upwards for the six fiscal quarters beginning with the second quarter 2020 in response to the effects of the pandemic on our business. Separately, we entered into a  COVID Corporate Financing Facility Other pension and postretirement benefits (costs), net For the years ended December 31, 2020 Change December 31, 2019 Change December 31, 2018 (In millions, except percentages) Financial volume in hectoliters —  —  % —  —  % —  Sales $ —  —  % $ —  —  % $ —  Excise taxes —  —  % —  —  % —  Net sales —  —  % —  —  % —  Cost of goods sold 107.6  N/M (0.8) (99.5) % (166.2) Gross profit 107.6  N/M (0.8) (99.5) % (166.2) Marketing, general and administrative expenses —  —  % —  —  % —  Special items, net —  —  % —  —  % —  Operating income (loss) 107.6  N/M (0.8) (99.5) % (166.2) Interest expense, net (263.5) (2.3) % (269.8) (10.6) % (301.9) Other pension and postretirement benefits (costs), net 30.3  N/M 2.9  (92.4) % 38.2  Other income (expense), net 4.9  N/M 0.2  N/M (0.8) Income (loss) before income taxes $ (120.7) (54.9) % $ (267.5) (37.9) % $ (430.7) 49