## Pension and OPEB MTM Adjustments 

Under our accounting policy related to the recognition of gains and losses for pension and OPEB plans, upon the annual remeasurement of our pension and OPEB plans in the fourth quarter, or on an interim basis as triggering events warrant, we immediately recognize gains and losses as a mark-to-market (“MTM”) gain or loss through net income. The largest component of our pension and OPEB expense typically relates to these MTM adjustments. We recorded a MTM loss of $4 in 2020, a MTM loss of $5 for the Successor period July 2, 2019 to December 31, 2019 and a MTM gain of $13 in 2018. These MTM adjustments were largely driven by fluctuations in discount rates, which increased in 2018 and decreased in both 2019 and 2020. In addition, a MTM loss of $44 was recorded upon Emergence, driven by reductions in discount rates, which was included within “Reorganization items, net” on the Consolidated Statement of Operations for the Predecessor period January 1, 2019 through July 1, 2019. These MTM adjustments are recognized in “Other non-operating (income) expense, net” in the Consolidated Statements of Operations. 

