Table of Contents P. Debt Long-Term Debt. $^{(1)}$  Includes various financing arrangements related to subsidiaries, unamortized debt discounts related to outstanding notes and bonds listed in the table above, an equity option related to the convertible notes due in 2019, and unamortized debt issuance costs. The principal amount of long-term debt maturing in each of the next five years is $1,000 in 2020, $1,250 in 2021, $627 in 2022, $0 in 2023, and $1,250 in 2024. Public Debt.  On October 15, 2019, the 1.63% Convertible Notes ("the Notes") matured in accordance with their terms and the Company repaid in cash on the maturity date the aggregate outstanding principal amount of the Notes of approximately $403 together with accrued and unpaid interest, pursuant to the terms of the Notes. During the first quarter of 2018, the Company completed the early redemption of its remaining outstanding 5.72% Notes due in 2019, with aggregate principal amount of $500, for $518 in cash including accrued and unpaid interest. As a result, the Company recorded a charge of $19 in Interest expense in the accompanying Statement of Consolidated Operations for 2018 primarily for the premium paid on the early redemption of these notes in excess of their carrying value. During the second quarter of 2017, the Company announced three separate cash tender offers by the Investment Banks for the purchase of the Company’s 6.50% Bonds due 2018 (the “6.50% Bonds”), 6.75% Notes due 2018 (the “6.75% Notes”), and 5.72% Notes due 2019 (the “5.72% Notes”), up to a maximum purchase amount of $1,000 aggregate principal amount of notes, subject to certain conditions. The Investment Banks purchased notes totaling $805 aggregate principal amount, including $150 aggregate principal amount of 6.50% Bonds, $405 aggregate principal amount of 6.75% Notes, and $250 aggregate principal amount of 5.72% Notes. Also, during the second quarter of 2017, the Company agreed to acquire the notes from the Investment Banks for $409 in cash plus its remaining investment in Alcoa Corporation common stock (12,958,767 shares valued at $35.91 per share) for total consideration of $874 including accrued and unpaid interest. The Company recorded a charge of $58 ($27 in cash) primarily for the premium for the early redemption of the notes, a benefit of $8 for the proceeds of a related interest rate swap agreement, and a charge of $2 for legal fees associated with the transaction in Interest expense, and recorded a gain of $167 in Other expense (income), net in the accompanying Statement of Consolidated Operations for the Debt-for- Equity Exchange. Finally, during the second quarter of 2017, the Company completed the early redemption of its remaining outstanding 6.50% Bonds, with aggregate principal amount of $100, and its remaining outstanding 6.75% Notes, with aggregate principal amount of $345, for $479 in cash including accrued and unpaid interest. As a result of the early redemption of the 6.50% Bonds and 6.75% Notes, the Company recorded a charge of $24 in Interest expense in the accompanying Statement of Consolidated Operations for the premium paid for the early redemption of these notes in excess of their carrying value. The Company has the option to redeem certain of its Notes and Bonds in whole or part, at any time at a redemption price equal to the greater of principal amount or the sum of the present values of the remaining scheduled payments, discounted using a defined treasury rate plus a spread, plus in either case accrued and unpaid interest to the redemption date. 96 December 31, 2019 2018 1.63% Convertible Notes, due 2019 $ — $ 403 6.150% Notes, due 2020 1,000 1,000 5.40% Notes, due 2021 1,250 1,250 5.87% Notes, due 2022 627 627 5.125% Notes, due 2024 1,250 1,250 5.90% Notes, due 2027 625 625 6.75% Bonds, due 2028 300 300 5.95% Notes due 2037 625 625 Iowa Finance Authority Loan, due 2042 (4.75%) 250 250 Other (1) (18) (29) 5,909 6,301 Less: amount due within one year 1,003 405 $ 4,906 $ 5,896