NOTES TO CONSOLIDATED FINANCIAL STATEMENTS During 2019, we adopted the new Pri-2012 mortality tables and MP-2019 mortality improvement projection scale in determining the liability for the U.S. plans. The updated mortality tables and projection scale, partially offset the decrease in the discount rates in 2019, the net of which resulted in the increase in the projected benefit obligation as of December 31, 2019. During 2018, we adopted the new MP-2018 mortality improvement projection scale in determining the liability for the U.S. plans. This updated scale, along with the change in the discount rates, contributed to a decrease in the projected benefit obligation as of December 31, 2018. Discount Rates. We determine our discount rates primarily based on high-quality, fixed-income investments and yield-to-maturity analyses specific to our estimated future benefit payments available as of the measurement date. Discount rates are reset annually on the measurement date to reflect current market conditions. To determine the discount rate for our U.S. pension and postretirement benefit plans, we use a bond matching approach to select specific bonds that would satisfy our projected benefit payments. We believe the bond matching approach reflects the process we would employ to settle our pension and postretirement benefit obligations. For our Canadian plans we use a third-party yield curve to develop our discount rates. The yield curve provides discount rates related to a dedicated high-quality bond portfolio whose cash flows extend beyond the current period, from which we choose a rate matched to the expected benefit payments required for each plan. Expected and Actual Return on Plan Assets. As stated in Note 1, in the fourth quarter of 2020 we voluntarily changed our method of accounting for recognizing actuarial gains and losses and expected return on plan assets for our defined benefit pension and other postretirement benefit plans. Under the new accounting principle the expected returns on plan assets are used to estimate pension expense throughout the year and remeasurement of the projected benefit obligation and plan assets are immediately recognized in earnings through net periodic benefit cost within Other Income (Expense) on the Consolidated Statements of Income (Loss), with pension and postretirement plans to be remeasured annually in the fourth quarter. Prior to 2020, actuarial gains and losses and the differences between the expected and actual return on plan assets were recognized as a component of Accumulated Other Comprehensive Loss, and were subject to amortization into earnings over time. Healthcare Costs. For the U.S. plan, an initial 6.5% annual rate of increase in the per capita cost of covered healthcare benefits was assumed for 2021 for pre-Medicare coverage. The rate was assumed to decrease gradually to an ultimate rate of 5.0% by 2027. For the Canadian plan, a flat 5.0% annual rate of increase in the per capita cost of covered healthcare benefits was assumed for 2021 and thereafter. Assumed healthcare cost trend rates have a significant effect on the amounts reported for the healthcare plan. We estimate that the future benefits payable for our retirement and postretirement plans are as follows at December 31, 2020: 100 Years ending December 31, 2020 U.S. Defined Benefit Plans Non-U.S. Defined Benefit Plans Other Benefit Plans (In millions) 2021 $ 42.8  $ 2.0  $ 1.5  2022 $ 42.6  $ 60.7  $ 1.5  2023 $ 42.5  $ —  $ 1.5  2024 $ 42.0  $ —  $ 1.5  2025 $ 41.4  $ —  $ 1.5  Next five fiscal years to December 31, 2030 $ 195.8  $ —  $ 7.1 