Table of Contents Contractual Obligations The following table presents our contractual cash obligations at December 31, 2018. Our contractual cash obligations consist of legal commitments at December 31, 2018 that require us to make fixed or determinable cash payments, regardless of the contractual requirements of the specific vendor to provide us with future goods or services. This table does not include information about most of our recurring purchases of materials used in our production; our raw material purchase contracts do not meet this definition since they generally do not require fixed or minimum quantities. Contracts with cancellation clauses are not included, unless a cancellation would result in a major disruption to our business. For example, we have contracts for information technology support that are cancelable, but this support is essential to the operation of our business and administrative functions; therefore, amounts payable under these contracts are included. These contractual obligations are grouped in the same manner as they are classified in the Consolidated Statements of Cash Flows in order to provide a better understanding of the nature of the obligations. Payments Due By Year Contractual Obligations 2019 2020 2021 2022 2023 2024 and beyond Total Operating activities: Purchase obligations  (1) $ 234 $ 117 $ 119 $ 44 $ 37 $ 314 $ 865 Interest on fixed rate debt obligations  (2) 304 236 111 62 8 — 721 Interest on variable rate debt obligations  (3) 9 3 1 1 1 — 15 Operating lease obligations 33 24 20 13 10 61 161 Funding of pension and other postretirement obligations  (4) 30 28 28 28 29 — 143 Financing activities: Long-term debt, including current maturities 3,706 34 2 1 — 6 3,749 Capital lease obligations 15 20 13 26 9 1 84 Total $ 4,331 $ 462 $ 294 $ 175 $ 94 $ 382 $ 5,738 (1) Purchase obligations are comprised of the fixed or minimum amounts of goods and/or services under long-term contracts and assumes that certain contracts are terminated in accordance with their terms after giving the requisite notice which is generally two to three years for most of these contracts; however, under certain circumstances, some of these minimum commitment term periods could be further reduced which would significantly decrease these contractual obligations. (2) Based on contractual debt maturities at December 31, 2018. Future interest obligations will depend on the results of the Chapter 11 Cases, which are not known at this time. (3) Based on applicable interest rates in effect at December 31, 2018. (4) Pension and other postretirement contributions have been included in the above table for the next five years. These amounts include estimated benefit payments to be made for unfunded foreign defined benefit pension plans as well as estimated contributions to our funded defined benefit plans. The assumptions used by our actuaries in calculating these projections includes a weighted average annual return on pension assets of approximately 6.5% for the years 2019 – 2022 and the continuation of current law and plan provisions. These estimated payments may vary based on the actual return on our plan assets or changes in current law or plan provisions. See Note 10 to the Consolidated Financial Statements in Item 8 of Part II of this Annual Report on Form 10-K for more information on our pension and postretirement obligations. The table above excludes payments for income taxes and environmental obligations since, at this time, we cannot determine either the timing or the amounts of all payments beyond 2018. At December 31, 2018, we recorded unrecognized tax benefits and related interest and penalties of $145. We estimate that we will pay between $15 and $25 in 2019 for U.S. Federal, state and international income taxes. We expect non-capital environmental expenditures for 2019 through 2022 totaling $17. See Notes 9 and 13 to the Consolidated Financial Statements in Item 8 of Part II of this Annual Report on 10-K for more information on these obligations. Off Balance Sheet Arrangements We had no off-balance sheet arrangements as of December 31, 2018. 40