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v3.20.4

Share-based Compensation and Employee Benefits - Schedule of Weighted-Average Actuarial Assumptions (Details) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Pension Benefits |  |  |
Assumptions related to benefit obligations: |  |  |
Discount rate | 2.27% | 3.17% | 4.26%
Rate of compensation increase | 3.50% | 3.50% | 3.50%
Interest crediting rate | 2.57% | 3.71% | 3.90%
Assumptions related to benefit costs: |  |  |
Expected return on plan assets | 6.75% | 7.25% | 7.25%
Rate of compensation increase | 3.50% | 3.50% | 3.50%
Interest crediting rate | 3.71% | 3.90% | 2.71%
OPEB |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
UBIT rate | 27.00% | 27.00% | 21.00%
Assumptions related to benefit obligations: |  |  |
Discount rate | 2.08% | 3.03% | 4.16%
Assumptions related to benefit costs: |  |  |
Expected return on plan assets | 6.50% | 6.50% | 7.08%
Benefit obligation | Pension Benefits |  |  |
Assumptions related to benefit costs: |  |  |
Discount rate | 3.17% | 4.26% | 3.56%
Benefit obligation | OPEB |  |  |
Assumptions related to benefit costs: |  |  |
Discount rate | 3.03% | 4.16% | 3.48%
Discount rate for interest on benefit obligations | Pension Benefits |  |  |
Assumptions related to benefit costs: |  |  |
Discount rate | 2.71% | 3.89% | 3.13%
Discount rate for interest on benefit obligations | OPEB |  |  |
Assumptions related to benefit costs: |  |  |
Discount rate | 2.63% | 3.83% | 3.08%
Discount rate for service cost | Pension Benefits |  |  |
Assumptions related to benefit costs: |  |  |
Discount rate | 3.24% | 4.28% | 3.56%
Discount rate for service cost | OPEB |  |  |
Assumptions related to benefit costs: |  |  |
Discount rate | 3.48% | 4.51% | 3.82%
Discount rate for interest on service cost | Pension Benefits |  |  |
Assumptions related to benefit costs: |  |  |
Discount rate | 2.80% | 3.93% | 3.14%
Discount rate for interest on service cost | OPEB |  |  |
Assumptions related to benefit costs: |  |  |
Discount rate | 3.39% | 4.46% | 3.76%

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