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Compensation and Benefit Plans (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Pension and Other Postretirement Benefits |
Employee Savings Plan Employer Contributions |
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Edison | ​ | ​ | ​
​ | ​ | International |  | SCE
(in millions) |  | Years ended December 31,
2021 | ​ | $ | 97 | ​ | $ | 96
2020 | ​ |  | 93 | ​ |  | 92
2019 | ​ |  | 82 | ​ |  | 81
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | The following table summarizes total expense and tax benefits associated with stock-based compensation:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Edison International | ​ | SCE
​ | ​ | Years ended December 31,
(in millions) |  | 2021 |  | 2020 |  | 2019 |  | 2021 |  | 2020 |  | 2019
Stock-based compensation expense1: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Stock options | ​ | $ | 16 | ​ | $ | 15 | ​ | $ | 13 | ​ | $ | 8 | ​ | $ | 7 | ​ | $ | 7
Performance shares | ​ |  | 9 | ​ |  | 5 | ​ |  | 8 | ​ |  | 4 | ​ |  | 2 | ​ |  | 4
Restricted stock units | ​ |  | 12 | ​ |  | 8 | ​ |  | 6 | ​ |  | 8 | ​ |  | 4 | ​ |  | 3
Other | ​ |  | 2 | ​ |  | 1 | ​ |  | 2 | ​ |  | — | ​ |  | — | ​ |  | —
Total stock-based compensation expense | ​ |  | 39 | ​ |  | 29 | ​ |  | 29 | ​ |  | 20 | ​ |  | 13 | ​ |  | 14
Income tax benefits related to stock compensation expense | ​ | $ | 4 | ​ | $ | 4 | ​ | $ | 10 | ​ | $ | 3 | ​ | $ | 3 | ​ | $ | 6
1 | Reflected in "Operation and maintenance" on Edison International's and SCE's consolidated statements of income.
Black-Sholes Option-Pricing Model Assumptions |
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years ended December 31,
​ |  | 2021 |  | 2020 |  | 2019
Expected terms (in years) |  | 5.4 |  | 5.2 |  | 5.5
Risk-free interest rate |  | 1.1% - 1.3% | ​ | 0.4% - 0.6% | ​ | 1.6% - 2.3%
Expected dividend yield |  | 4.1% - 4.8% | ​ | 4.2% - 5.0% | ​ | 3.3% - 4.0%
Weighted average expected dividend yield |  | 4.5% | ​ | 4.7% | ​ | 3.9%
Expected volatility |  | 26.9% - 27.1% | ​ | 24.9% - 26.9% | ​ | 21.7% - 24.1%
Weighted average volatility |  | 26.9% | ​ | 25.0% | ​ | 21.8%
Summary of Stock Options Activity | The following is a summary of the status of Edison International's stock options:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted Average | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Remaining |  | Aggregate
​ | ​ | Stock | ​ | Exercise | ​ | Contractual | ​ | Intrinsic Value
​ | ​ | Options | ​ | Price |  | Term (years) |  | (in millions)
Edison International: |  |  |  | ​ |  |  |  |  | ​ |
Outstanding at December 31, 2020 |  | 10,709,383 | ​ | $ | 63.85 |  |  |  | ​ |
Granted |  | 2,515,015 | ​ |  | 55.04 |  |  |  | ​ |
Forfeited or expired |  | (330,916) | ​ |  | 62.49 |  |  |  | ​ |
Exercised1 |  | (538,656) | ​ |  | 48.02 |  |  |  | ​ |
Outstanding at December 31, 2021 |  | 12,354,826 | ​ |  | 62.78 |  | 5.93 |  | ​ |
Vested and expected to vest at December 31, 2021 |  | 11,974,609 | ​ |  | 62.83 |  | 5.85 | ​ | $ | 80
Exercisable at December 31, 2021 |  | 7,412,820 | ​ | $ | 64.27 |  | 4.43 | ​ | $ | 43
SCE: |  |  | ​ |  |  |  |  | ​ |  |
Outstanding at December 31, 2020 |  | 5,490,488 | ​ | $ | 62.85 |  |  | ​ |  |
Granted |  | 1,404,603 | ​ |  | 55.14 |  |  | ​ |  |
Forfeited or expired |  | (307,607) | ​ |  | 62.65 |  |  | ​ |  |
Exercised1 |  | (407,330) | ​ |  | 48.80 |  |  | ​ |  |
Outstanding at December 31, 2021 |  | 6,180,154 | ​ |  | 62.03 |  | 5.87 | ​ |  |
Vested and expected to vest at December 31, 2021 |  | 5,997,654 | ​ |  | 62.07 |  | 5.80 | ​ | $ | 44
Exercisable at December 31, 2021 |  | 3,666,657 | ​ | $ | 63.24 |  | 4.27 | ​ | $ | 25
1 | Edison International and SCE recognized tax benefits of $2 million and $2 million, respectively, from stock options exercised in 2021.
Schedule of Unrecognized Compensation Expense | At December 31, 2021, total unrecognized compensation cost related to stock options and the weighted average period the cost is expected to be recognized are as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Edison International |  | SCE
Unrecognized compensation cost, net of expected forfeitures (in millions) | ​ | $ | 18 | ​ | $ | 9
Weighted average period (in years) | ​ |  | 2.4 | ​ |  | 2.4
Supplemental Data on Stock-based Compensation | The following is a summary of supplemental data on stock options:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Edison International | ​ | SCE
​ | ​ | Years ended December 31,
(in millions, except per award amounts) |  | 2021 |  | 2020 |  | 2019 |  | 2021 |  | 2020 |  | 2019
Weighted average grant date fair value per option granted | ​ | $ | 7.26 | ​ | $ | 8.18 | ​ | $ | 8.80 | ​ | $ | 7.30 | ​ | $ | 8.16 | ​ | $ | 8.83
Fair value of options vested | ​ |  | 3 | ​ |  | 2 | ​ |  | 14 | ​ |  | 3 | ​ |  | 2 | ​ |  | 7
Value of options exercised | ​ |  | 8 | ​ |  | 9 | ​ |  | 27 | ​ |  | 6 | ​ |  | 7 | ​ |  | 19
​
Summary of Nonvested Share Activity | The following is a summary of the status of Edison International's nonvested performance shares:
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Equity Awards
​ |  | ​ |  | Weighted Average
​ | ​ | Shares | ​ | Fair Value
Edison International: |  |  |  | ​ |
Nonvested at December 31, 2020 |  | 233,624 | ​ | $ | 66.80
Granted |  | 158,442 | ​ |  | 57.70
Forfeited |  | (18,250) | ​ |  | 62.51
Vested |  | (111,008) | ​ |  | 66.06
Nonvested at December 31, 2021 |  | 262,808 | ​ | $ | 61.92
SCE: |  |  | ​ |  |
Nonvested at December 31, 2020 |  | 120,644 | ​ | $ | 66.70
Granted |  | 88,983 | ​ |  | 57.66
Forfeited |  | (17,306) | ​ |  | 62.77
Vested |  | (54,514) | ​ |  | 66.34
Nonvested at December 31, 2021 |  | 137,807 | ​ | $ | 61.50
Summary of Nonvested Restricted Stock Units Activity | The following is a summary of the status of Edison International's nonvested restricted stock units:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Edison International | ​ | SCE
​ |  | ​ |  | Weighted Average |  | ​ |  | Weighted Average
​ | ​ | Restricted | ​ | Grant Date | ​ | Restricted | ​ | Grant Date
​ | ​ | Stock Units |  | Fair Value | ​ | Stock Units |  | Fair Value
Nonvested at December 31, 2020 |  | 333,873 | ​ | $ | 63.78 |  | 168,420 | ​ | $ | 63.78
Granted |  | 337,793 | ​ |  | 55.07 |  | 250,490 | ​ |  | 55.12
Forfeited |  | (27,622) | ​ |  | 58.81 |  | (25,275) | ​ |  | 59.18
Vested |  | (97,889) | ​ |  | 59.34 |  | (48,703) | ​ |  | 59.33
Nonvested at December 31, 2021 |  | 546,155 | ​ | $ | 59.44 |  | 344,932 | ​ | $ | 58.45
Pension Plans |
Pension and Other Postretirement Benefits |
Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan | Information on pension plan assets and benefit obligations for continuing and discontinued operations is shown below.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Edison International | ​ | SCE |
​ | ​ | Years ended December 31, | ​
(in millions) |  | 2021 |  | 2020 |  | 2021 |  | 2020 | ​
Change in projected benefit obligation |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  | ​
Projected benefit obligation at beginning of year | ​ | $ | 4,476 | ​ | $ | 4,139 | ​ | $ | 3,984 | ​ | $ | 3,662 | ​
Service cost | ​ |  | 130 | ​ |  | 121 | ​ |  | 126 | ​ |  | 117 | ​
Interest cost | ​ |  | 103 | ​ |  | 124 | ​ |  | 92 | ​ |  | 110 | ​
Actuarial (gain) loss | ​ |  | (245) | ​ |  | 323 | ​ |  | (246) | ​ |  | 292 | ​
Benefits paid | ​ |  | (293) | ​ |  | (231) | ​ |  | (262) | ​ |  | (197) | ​
Projected benefit obligation at end of year | ​ | $ | 4,171 | ​ | $ | 4,476 | ​ | $ | 3,694 | ​ | $ | 3,984 | ​
Change in plan assets | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Fair value of plan assets at beginning of year | ​ | $ | 4,171 | ​ | $ | 3,755 | ​ | $ | 3,940 | ​ | $ | 3,541 | ​
Actual return on plan assets | ​ |  | 368 | ​ |  | 584 | ​ |  | 348 | ​ |  | 551 | ​
Employer contributions | ​ |  | 50 | ​ |  | 62 | ​ |  | 35 | ​ |  | 45 | ​
Benefits paid | ​ |  | (293) | ​ |  | (230) | ​ |  | (262) | ​ |  | (197) | ​
Fair value of plan assets at end of year | ​ |  | 4,296 | ​ |  | 4,171 | ​ |  | 4,061 | ​ |  | 3,940 | ​
Funded status at end of year | ​ | $ | 125 | ​ | $ | (305) | ​ | $ | 367 | ​ | $ | (44) | ​
Amounts recognized in the consolidated balance sheets consist of 1: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Long-term assets | ​ | $ | 384 | ​ | $ | — | ​ | $ | 384 | ​ | $ | — | ​
Current liabilities | ​ |  | (26) | ​ |  | (24) | ​ |  | (2) | ​ |  | (2) | ​
Long-term liabilities | ​ |  | (233) | ​ |  | (281) | ​ |  | (15) | ​ |  | (42) | ​
​ | ​ | $ | 125 | ​ | $ | (305) | ​ | $ | 367 | ​ | $ | (44) | ​
Amounts recognized in accumulated other comprehensive loss consist of: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Prior service cost | ​ | $ | — | ​ | $ | (1) | ​ | $ | — | ​ | $ | — | ​
Net loss1 | ​ |  | 74 | ​ |  | 96 | ​ |  | 12 | ​ |  | 16 | ​
​ | ​ |  | 74 | ​ |  | 95 | ​ |  | 12 | ​ |  | 16 | ​
Amounts recognized as a regulatory (liability)/asset | ​ |  | (395) | ​ |  | 12 | ​ |  | (395) | ​ |  | 12 | ​
Total not yet recognized as (income)/expense | ​ | $ | (321) | ​ | $ | 107 | ​ | $ | (383) | ​ | $ | 28 | ​
Accumulated benefit obligation at end of year | ​ | $ | 3,947 | ​ | $ | 4,238 | ​ | $ | 3,491 | ​ | $ | 3,776 | ​
Pension plans with an accumulated benefit obligation in excess of plan assets: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Projected benefit obligation | ​ |  | 4,171 | ​ |  | 4,476 | ​ |  | 3,694 | ​ |  | 3,984 | ​
Accumulated benefit obligation | ​ |  | 3,947 | ​ |  | 4,238 | ​ |  | 3,491 | ​ |  | 3,766 | ​
Fair value of plan assets | ​ |  | 4,296 | ​ |  | 4,171 | ​ |  | 4,061 | ​ |  | 3,940 | ​
Weighted average assumptions used to determine obligations at end of year: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Discount rate | ​ |  | 2.75 | % |  | 2.38 | % |  | 2.75 | % |  | 2.38 | %
Rate of compensation increase | ​ |  | 4.00 | % |  | 4.00 | % |  | 4.00 | % |  | 4.00 | %
​
1 | The SCE liability excludes a long-term payable due to Edison International Parent of $132 million and $139 million at December 31, 2021 and 2020, respectively, related to certain SCE postretirement benefit obligations transferred to Edison International Parent. SCE's accumulated other comprehensive loss of $12 million and $16 million at December 31, 2021 and 2020, excludes net losses of $32 million and $41 million related to these benefits, respectively.
Expense Components for Plans | Net periodic pension expense components are:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Edison International | ​ | SCE
​ | Years ended December 31,
(in millions) | 2021 |  | 2020 |  | 2019 |  | 2021 |  | 2020 |  | 2019
Service cost | $ | 130 | ​ | $ | 121 | ​ | $ | 114 | ​ | $ | 127 | ​ | $ | 119 | ​ | $ | 111
Non-service cost (benefit) |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Interest cost |  | 103 | ​ |  | 124 | ​ |  | 155 | ​ |  | 95 | ​ |  | 114 | ​ |  | 143
Expected return on plan assets |  | (222) | ​ |  | (215) | ​ |  | (205) | ​ |  | (211) | ​ |  | (203) | ​ |  | (194)
Amortization of prior service cost |  | 1 | ​ |  | 2 | ​ |  | 2 | ​ |  | 1 | ​ |  | 1 | ​ |  | 2
Amortization of net loss |  | 11 | ​ |  | 10 | ​ |  | 7 | ​ |  | 7 | ​ |  | 7 | ​ |  | 5
Regulatory adjustment |  | 25 | ​ |  | 16 | ​ |  | (3) | ​ |  | 25 | ​ |  | 16 | ​ |  | (3)
Total non-service benefit |  | (82) | ​ |  | (63) | ​ |  | (44) | ​ |  | (83) | ​ |  | (65) | ​ |  | (47)
Total expense recognized | $ | 48 | ​ | $ | 58 | ​ | $ | 70 | ​ | $ | 44 | ​ | $ | 54 | ​ | $ | 64
Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income | Other changes in pension plan assets and benefit obligations recognized in other comprehensive income:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Edison International | ​ | SCE
​ | ​ | Years ended December 31,
(in millions) |  | 2021 |  | 2020 |  | 2019 |  | 2021 |  | 2020 |  | 2019
Net (gain) loss | ​ | $ | (10) | ​ | $ | 11 | ​ | $ | 19 | ​ | $ | (5) | ​ | $ | 9 | ​ | $ | 21
Amortization of net loss | ​ |  | (11) | ​ |  | (10) | ​ |  | (7) | ​ |  | (7) | ​ |  | (7) | ​ |  | (5)
Total (gain) loss recognized in other comprehensive income | ​ |  | (21) | ​ |  | 1 | ​ |  | 12 | ​ |  | (12) | ​ |  | 2 | ​ |  | 16
Total recognized in expense and other comprehensive income | ​ | $ | 27 | ​ | $ | 59 | ​ | $ | 82 | ​ | $ | 32 | ​ | $ | 56 | ​ | $ | 80
​
Schedule of Assumptions Used | Edison International and SCE used the following weighted average assumptions to determine pension expense:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years ended December 31, |
​ |  | 2021 |  | 2020 |  | 2019 |
Discount rate |  | 2.38 | % | 3.11 | % | 4.19 | %
Rate of compensation increase |  | 4.00 | % | 4.10 | % | 4.10 | %
Expected long-term return on plan assets |  | 5.50 | % | 6.00 | % | 6.50 | %
Interest crediting rate for cash balance account | ​ | ​ | ​ | ​ | ​ | ​ | ​
Starting rate | ​ | 3.03 | % | 3.61 | % | 4.46 | %
Ultimate rate | ​ | 4.50 | % | 5.00 | % | 5.75 | %
Year ultimate rate is reached | ​ | 2025 | ​ | 2025 | ​ | 2022 | ​
​
Schedule of Expected Benefit Payments | The following benefit payments, which reflect service rendered and expected future service, are expected to be paid:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Edison | ​ | ​ | ​
​ | ​ | International |  | SCE
(in millions) |  | Years ended December 31,
2022 | ​ | $ | 315 | ​ | $ | 274
2023 | ​ |  | 315 | ​ |  | 273
2024 | ​ |  | 313 | ​ |  | 272
2025 | ​ |  | 308 | ​ |  | 269
2026 | ​ |  | 306 | ​ |  | 267
2027 – 2031 | ​ |  | 1,358 | ​ |  | 1,210
​
Schedule of Pension Plan Assets by Hierarchy Levels | The following table sets forth the investments for Edison International and SCE that were accounted for at fair value as of December 31, 2021 and December 31, 2020, respectively, by asset class and level within the fair value hierarchy:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2021
(in millions) |  | Level 1 |  | Level 2 |  | NAV1 |  | Total
U.S. government and agency securities2 | ​ | $ | 217 | ​ | $ | 918 | ​ | $ | — | ​ | $ | 1,135
Corporate stocks3 | ​ |  | 466 | ​ |  | 4 | ​ |  | — | ​ |  | 470
Corporate bonds4 | ​ |  | — | ​ |  | 815 | ​ |  | — | ​ |  | 815
Common/collective funds5 | ​ |  | — | ​ |  | — | ​ |  | 964 | ​ |  | 964
Partnerships/joint ventures6 | ​ |  | — | ​ |  | — | ​ |  | 688 | ​ |  | 688
Other investment entities7 | ​ |  | — | ​ |  | — | ​ |  | 110 | ​ |  | 110
Registered investment companies8 | ​ |  | 57 | ​ |  | — | ​ |  | 31 | ​ |  | 88
Interest-bearing cash | ​ |  | 8 | ​ |  | — | ​ |  | — | ​ |  | 8
Other | ​ |  | — | ​ |  | 45 | ​ |  | — | ​ |  | 45
Total | ​ | $ | 748 | ​ | $ | 1,782 | ​ | $ | 1,793 | ​ | $ | 4,323
Receivables and payables, net | ​ |  | ​ | ​ |  |  | ​ |  |  | ​ |  | (27)
Combined net plan assets available for benefits | ​ |  | ​ | ​ |  |  | ​ |  |  | ​ |  | 4,296
SCE's share of net plan assets | ​ | ​ | ​ | ​ |  |  | ​ |  |  | ​ | $ | 4,061
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2020
(in millions) |  | Level 1 |  | Level 2 |  | NAV1 |  | Total
U.S. government and agency securities2 | ​ | $ | 151 | ​ | $ | 1,006 | ​ | $ | — | ​ | $ | 1,157
Corporate stocks3 | ​ |  | 570 | ​ |  | 5 | ​ |  | — | ​ |  | 575
Corporate bonds4 | ​ |  | — | ​ |  | 601 | ​ |  | — | ​ |  | 601
Common/collective funds5 | ​ |  | — | ​ |  | — | ​ |  | 1,017 | ​ |  | 1,017
Partnerships/joint ventures6 | ​ |  | — | ​ |  | — | ​ |  | 569 | ​ |  | 569
Other investment entities7 | ​ |  | — | ​ |  | — | ​ |  | 137 | ​ |  | 137
Registered investment companies8 | ​ |  | 69 | ​ |  | — | ​ |  | 23 | ​ |  | 92
Interest-bearing cash | ​ |  | 7 | ​ |  | — | ​ |  | — | ​ |  | 7
Other | ​ |  | — | ​ |  | 39 | ​ |  | — | ​ |  | 39
Total | ​ | $ | 797 | ​ | $ | 1,651 | ​ | $ | 1,746 | ​ | $ | 4,194
Receivables and payables, net | ​ |  | ​ | ​ |  |  | ​ |  |  | ​ |  | (23)
Combined net plan assets available for benefits | ​ |  | ​ | ​ |  |  | ​ |  |  | ​ |  | 4,171
SCE's share of net plan assets | ​ | ​ | ​ | ​ |  |  | ​ |  |  | ​ | $ | 3,940
​
1 | These investments are measured at fair value using the net asset value per share practical expedient and have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the net plan assets available for benefits.
2 | Level 1 U.S. government and agency securities are U.S. treasury bonds and notes. Level 2 primarily relates to the Federal National Mortgage Association and the Federal Home Loan Mortgage Corporation.
3 | Corporate stocks are diversified. At December 31, 2021 and 2020, respectively, performance for actively managed separate accounts is primarily benchmarked against the Russell Indexes (44% and 40%) and Morgan Stanley Capital International (MSCI) index (56% and 60%).
4 | Corporate bonds are diversified. At December 31, 2021 and 2020, respectively, this category includes $61 million and $54 million for collateralized mortgage obligations and other asset backed securities.
5 | At December 31, 2021 and 2020, respectively, the common/collective assets are invested in equity index funds that seek to track performance of the Standard and Poor's 500 Index (41% and 37%) and Russell 1000 indexes (10% and 13%). In addition, at December 31, 2021 and 2020, respectively, 38% and 40% of the assets in this category are in index funds which seek to track performance in the MSCI All Country World Index exUS and 9% and 8% of this category are in non-index U.S. equity fund, which is actively managed.
6 | At December 31, 2021 and 2020, respectively, 62% and 49% are invested in private equity funds with investment strategies that include branded consumer products and clean technology companies, 17% and 23% are invested in ABS including distressed mortgages and commercial and residential loans, 15% and 19% are invested in publicly traded fixed income securities, and 3% and 4% are invested in a broad range of financial assets in all global markets.
7 | At December 31, 2021 and 2020, respectively, 71% and 77% are invested in emerging market equity securities and 20% and 16% are invested in domestic mortgage backed securities.
8 | At December 31, 2021 and 2020, respectively, registered investment companies were invested in Level 1 registered investment companies primarily consisted of a global equity mutual fund which seeks to outperform the MSCI World Total Return Index (63% and 73%) and investments included fixed income fund used for cash management (35% and 25%).
Postretirement Benefits Other Than Pensions |
Pension and Other Postretirement Benefits |
Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Edison International | ​ | SCE |
​ | ​ | Years ended December 31, |
(in millions) |  | 2021 |  | 2020 |  | 2021 |  | 2020 |
Change in benefit obligation |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  | ​
Benefit obligation at beginning of year | ​ | $ | 2,073 | ​ | $ | 2,083 | ​ | $ | 2,064 | ​ | $ | 2,074 | ​
Service cost | ​ |  | 40 | ​ |  | 38 | ​ |  | 40 | ​ |  | 37 | ​
Interest cost | ​ |  | 52 | ​ |  | 63 | ​ |  | 52 | ​ |  | 63 | ​
Actuarial loss (gain) | ​ |  | (190) | ​ |  | (46) | ​ |  | (190) | ​ |  | (45) | ​
Plan participants' contributions | ​ |  | 29 | ​ |  | 29 | ​ |  | 29 | ​ |  | 29 | ​
Benefits paid | ​ |  | (100) | ​ |  | (94) | ​ |  | (100) | ​ |  | (94) | ​
Benefit obligation at end of year | ​ | $ | 1,904 | ​ | $ | 2,073 | ​ | $ | 1,895 | ​ | $ | 2,064 | ​
Change in plan assets | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Fair value of plan assets at beginning of year | ​ | $ | 2,717 | ​ | $ | 2,465 | ​ | $ | 2,717 | ​ | $ | 2,464 | ​
Actual return on assets | ​ |  | 119 | ​ |  | 309 | ​ |  | 119 | ​ |  | 309 | ​
Employer contributions | ​ |  | 7 | ​ |  | 8 | ​ |  | 7 | ​ |  | 8 | ​
Plan participants' contributions | ​ |  | 29 | ​ |  | 29 | ​ |  | 29 | ​ |  | 29 | ​
Benefits paid | ​ |  | (100) | ​ |  | (94) | ​ |  | (100) | ​ |  | (93) | ​
Fair value of plan assets at end of year | ​ |  | 2,772 | ​ |  | 2,717 | ​ |  | 2,772 | ​ |  | 2,717 | ​
Funded status at end of year | ​ | $ | 868 | ​ | $ | 644 | ​ | $ | 877 | ​ | $ | 653 | ​
Amounts recognized in the consolidated balance sheets consist of: | ​ |  |  | ​ |  |  | ​ |  | ​ | ​ |  |  | ​
Long-term assets | ​ | $ | 876 | ​ | $ | 663 | ​ | $ | 885 | ​ | $ | 663 | ​
Current liabilities | ​ |  | (8) | ​ |  | (10) | ​ |  | (8) | ​ |  | (10) | ​
Long-term liabilities | ​ |  | — | ​ |  | (9) | ​ |  | — | ​ |  | — | ​
​ | ​ | $ | 868 | ​ | $ | 644 | ​ | $ | 877 | ​ | $ | 653 | ​
Amounts recognized in accumulated other comprehensive loss consist of: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Net loss | ​ | $ | 1 | ​ | $ | 1 | ​ | $ | — | ​ | $ | — | ​
Amounts recognized as a regulatory liability | ​ |  | (886) | ​ |  | (671) | ​ |  | (886) | ​ |  | (671) | ​
Total not yet recognized as income | ​ | $ | (885) | ​ | $ | (670) | ​ | $ | (886) | ​ | $ | (671) | ​
Weighted average assumptions used to determine obligations at end of year: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Discount rate | ​ |  | 2.95 | % |  | 2.67 | % |  | 2.95 | % |  | 2.67 | %
Assumed health care cost trend rates: | ​ |  | ​ | ​ |  |  | ​ |  |  | ​ |  |  | ​
Rate assumed for following year | ​ |  | 6.25 | % |  | 6.50 | % |  | 6.25 | % |  | 6.50 | %
Ultimate rate | ​ |  | 5.00 | % |  | 5.00 | % |  | 5.00 | % |  | 5.00 | %
Year ultimate rate reached | ​ |  | 2029 | ​ |  | 2029 | ​ |  | 2029 | ​ |  | 2029 | ​
Expense Components for Plans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Edison International | ​ | SCE
​ | Years ended December 31,
(in millions) | 2021 |  | 2020 |  | 2019 |  | 2021 |  | 2020 |  | 2019
Service cost | $ | 40 | ​ | $ | 38 | ​ | $ | 30 | ​ | $ | 40 | ​ | $ | 37 | ​ | $ | 30
Non-service cost (benefit) |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Interest cost |  | 52 | ​ |  | 63 | ​ |  | 77 | ​ |  | 52 | ​ |  | 63 | ​ |  | 77
Expected return on plan assets |  | (106) | ​ |  | (119) | ​ |  | (111) | ​ |  | (106) | ​ |  | (119) | ​ |  | (111)
Amortization of prior service cost |  | (1) | ​ |  | (1) | ​ |  | (1) | ​ |  | (1) | ​ |  | (1) | ​ |  | (1)
Amortization of net gain |  | (35) | ​ |  | (29) | ​ |  | (17) | ​ |  | (36) | ​ |  | (29) | ​ |  | (17)
Regulatory adjustment |  | 51 | ​ |  | 49 | ​ |  | 29 | ​ |  | 51 | ​ |  | 49 | ​ |  | 29
Total non-service benefit |  | (39) | ​ |  | (37) | ​ |  | (23) | ​ |  | (40) | ​ |  | (37) | ​ |  | (23)
Total expense | $ | 1 | ​ | $ | 1 | ​ | $ | 7 | ​ | $ | — | ​ | $ | — | ​ | $ | 7
Schedule of Assumptions Used | Edison International and SCE used the following weighted average assumptions to determine PBOP expense:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years ended December 31, |
​ |  | 2021 |  | 2020 |  | 2019 |
Discount rate |  | 2.67 | % | 3.32 | % | 4.35 | %
Expected long-term return on plan assets |  | 4.00 | % | 4.90 | % | 5.30 | %
Assumed health care cost trend rates: |  |  |  |  |  |  | ​
Current year |  | 6.50 | % | 6.50 | % | 6.75 | %
Ultimate rate |  | 5.00 | % | 5.00 | % | 5.00 | %
Year ultimate rate reached |  | 2029 |  | 2029 |  | 2029 | ​
Schedule of Expected Benefit Payments | The following benefit payments (net of plan participants' contributions) are expected to be paid:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Edison | ​ | ​ | ​
​ | ​ | International |  | SCE
(in millions) |  | Years ended December 31,
2022 | ​ | $ | 78 | ​ | $ | 78
2023 | ​ |  | 80 | ​ |  | 80
2024 | ​ |  | 83 | ​ |  | 82
2025 | ​ |  | 84 | ​ |  | 84
2026 | ​ |  | 86 | ​ |  | 86
2027 – 2031 | ​ |  | 454 | ​ |  | 452
Schedule of Pension Plan Assets by Hierarchy Levels | The following table sets forth the VEBA Trust assets for Edison International and SCE that were accounted for at fair value as of December 31, 2021 and December 31, 2020, respectively, by asset class and level within the fair value hierarchy:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2021
(in millions) |  | Level 1 |  | Level 2 |  | NAV1 |  | Total
U.S. government and agency securities2 | ​ | $ | 813 | ​ | $ | 10 | ​ | $ | — | ​ | $ | 823
Corporate stocks3 | ​ |  | 145 | ​ |  | 3 | ​ |  | — | ​ |  | 148
Corporate notes and bonds4 | ​ |  | — | ​ |  | 997 | ​ |  | — | ​ |  | 997
Common/collective funds5 | ​ |  | — | ​ |  | — | ​ |  | 544 | ​ |  | 544
Partnerships6 | ​ |  | — | ​ |  | — | ​ |  | 107 | ​ |  | 107
Registered investment companies7 | ​ |  | 44 | ​ |  | — | ​ |  | — | ​ |  | 44
Interest bearing cash | ​ |  | — | ​ |  | 51 | ​ |  | — | ​ |  | 51
Other8 | ​ |  | — | ​ |  | 59 | ​ |  | — | ​ |  | 59
Total | ​ | $ | 1,002 | ​ | $ | 1,120 | ​ | $ | 651 | ​ | $ | 2,773
Receivables and payables, net | ​ |  | ​ | ​ |  |  | ​ |  |  | ​ |  | (1)
Combined net plan assets available for benefits | ​ |  | ​ | ​ |  |  | ​ |  |  | ​ |  | 2,772
SCE's share of net plan assets | ​ | ​ | ​ | ​ |  |  | ​ |  |  | ​ | $ | 2,772
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2020
(in millions) |  | Level 1 |  | Level 2 |  | NAV1 |  | Total
U.S. government and agency securities2 | ​ | $ | 380 | ​ | $ | 30 | ​ | $ | — | ​ | $ | 410
Corporate stocks3 | ​ |  | 224 | ​ |  | 3 | ​ |  | — | ​ |  | 227
Corporate notes and bonds4 | ​ |  | — | ​ |  | 1,079 | ​ |  | — | ​ |  | 1,079
Common/collective funds5 | ​ |  | — | ​ |  | — | ​ |  | 693 | ​ |  | 693
Partnerships6 | ​ |  | — | ​ |  | — | ​ |  | 81 | ​ |  | 81
Registered investment companies7 | ​ |  | 65 | ​ |  | — | ​ |  | — | ​ |  | 65
Interest bearing cash | ​ |  | — | ​ |  | 26 | ​ |  | — | ​ |  | 26
Other8 | ​ |  | — | ​ |  | 132 | ​ |  | — | ​ |  | 132
Total | ​ | $ | 669 | ​ | $ | 1,270 | ​ | $ | 774 | ​ | $ | 2,713
Receivables and payables, net | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  | 4
Combined net plan assets available for benefits | ​ |  |  | ​ |  |  | ​ |  |  | ​ | $ | 2,717
SCE's share of net plan assets | ​ | ​ | ​ | ​ |  |  | ​ |  |  | ​ | $ | 2,717
​
1 | These investments are measured at fair value using the net asset value per share practical expedient and have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the net plan assets available for benefits.
2 | Level 1 U.S. government and agency securities are U.S. treasury bonds and notes. Level 2 primarily relates to the Federal Home Loan Mortgage Corporation and the Federal National Mortgage Association.
3 | Corporate stock performance for actively managed separate accounts is primarily benchmarked against the Russell Indexes (73% and 70%) and the MSCI All Country World Index (27% and 30%) for 2021 and 2020, respectively.
4 | Corporate notes and bonds are diversified and include approximately $150 million and $170 million for commercial collateralized mortgage obligations and other asset backed securities at December 31, 2021 and 2020, respectively.
5 | At December 31, 2021 and 2020, respectively, 65% and 70% of the common/collective assets are invested in index funds which seek to track performance in the MSCI All Country World Index Investable Market Index. 25% and 22% are invested in a non-index U.S. equity fund which is actively managed. The remaining assets in this category are primarily invested in emerging market fund.
6 | At December 31, 2021 and 2020, respectively, 54% and 46% of the partnerships are invested in private equity and venture capital funds. Investment strategies for these funds include branded consumer products, clean and information technology and healthcare. Of the remaining partnerships category, 35% and 36% are invested in asset backed securities including distressed mortgages, distressed companies and commercial and residential loans and debt and equity of banks, 11% and 18% are invested in a broad range of financial assets in all global markets.
7 | At December 31, 2021 and 2020, respectively, registered investment companies were primarily invested in a money market fund (61% and 51%) and exchange rate trade funds which seek to track performance of MSCI Emerging Market Index, Russell 2000 Index and international small cap equities (39% and 49%)
8 | Other includes $44 million and $61 million of municipal securities at December 31, 2021 and 2020, respectively.

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