pre_text: Expected Cash Flows The Combined Pension Plan payments, post-retirement health care benefit payments and premiums, and life insurance premium payments are either distributed from plan assets or paid by us. The estimated benefit payments provided below are based on actuarial assumptions using the demographics of the employee and retiree populations and have been reduced by estimated participant contributions.
table: Combined Pension Plan Post-Retirement Benefit Plans Medicare Part D Subsidy Receipts
table: (Dollars in millions)
table: Estimated future benefit payments:
table: 2020 $971 242 (6)
table: 2021 921 238 (6)
table: 2022 893 232 (6)
table: 2023 868 226 (5)
table: 2024 842 219 (5)
table: 2025-2029 3,813 986 (20)
question: Analyse this data from a financial earnings document. What is the change in combined pension plan in 2021 from 2020?