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Employee Benefits (Tables) | 12 Months Ended
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Dec. 31, 2022
Employee Benefits [Abstract] |
Assets and Liabilities associated with Non Qualified Benefit Plans [Table Text Block] | Trust assets and plan liabilities related to the NQBP included in PGE’s consolidated balance sheets are as follows as of December 31 (in millions):
| 2022 |  | 2021
| NQBP |  | Other NQBP |  | Total |  | NQBP |  | Other NQBP |  | Total
Non-qualified benefit plan trust assets | $ | 19 |  |  | $ | 19 |  |  | $ | 38 |  |  | $ | 21 |  |  | $ | 24 |  |  | $ | 45 |
Non-qualified benefit plan liabilities * | 16 |  |  | 67 |  |  | 83 |  |  | 25 |  |  | 70 |  |  | 95 |
* For the NQBP, excludes the current portion of $2 million in 2022 and 2021, which are classified in Accrued expenses and other current liabilities in the consolidated balance sheets.
Schedule of Allocation of Plan Assets [Table Text Block] | The asset allocations for the plans, and the target allocation, are as follows:
| As of December 31,
| 2022 |  | 2021
| Actual |  | Target * |  | Actual |  | Target *
Defined Benefit Pension Plan: |  |  |  |  |  |  |
Equity securities | 55 | % |  | 55 | % |  | 61 | % |  | 60 | %
Debt securities | 45 |  |  | 45 |  |  | 39 |  |  | 40 |
Total | 100 | % |  | 100 | % |  | 100 | % |  | 100 | %
Other Postretirement Benefit Plans: |  |  |  |  |  |  |
Equity securities | 39 | % |  | 40 | % |  | 59 | % |  | 57 | %
Debt securities | 61 |  |  | 60 |  |  | 41 |  |  | 43 |
Total | 100 | % |  | 100 | % |  | 100 | % |  | 100 | %
Non-Qualified Benefits Plans: |  |  |  |  |  |  |
Equity securities | 7 | % |  | 5 | % |  | 8 | % |  | 7 | %
Debt securities | 9 |  |  | 11 |  |  | 13 |  |  | 14 |
Insurance contracts | 84 |  |  | 84 |  |  | 79 |  |  | 79 |
Total | 100 | % |  | 100 | % |  | 100 | % |  | 100 | %
* The target for the Defined Benefit Pension Plan represents the mid-point of the investment target range. Due to the nature of the investment vehicles in both the Other Postretirement Benefit Plans and the NQBP, these targets are the weighted average of the mid-point of the respective investment target ranges approved by the Investment Committee. Due to the method used to calculate the weighted average targets for the Other Postretirement Benefit Plans and NQBP, reported percentages are affected by the fair market values of the investments within the pools.
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] | The Company’s financial assets and liabilities whose values were recognized at fair value are as follows by level within the fair value hierarchy (in millions):
| December 31, 2022
| Level 1 |  | Level 2 |  | Level 3 |  | Other(2) |  | Total
Assets: |  |  |  |  |  |  |  |  |
Cash equivalents | $ | 150 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 150 |
Nuclear decommissioning trust: (1) |  |  |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |  |  |
Domestic government | 9 |  |  | 10 |  |  | — |  |  | — |  |  | 19 |
Corporate credit | — |  |  | 9 |  |  | — |  |  | — |  |  | 9 |
Money market funds measured at NAV (2) | — |  |  | — |  |  | — |  |  | 11 |  |  | 11 |
Non-qualified benefit plan trust: (3) |  |  |  |  |  |  |  |  |
Money market funds | 1 |  |  | — |  |  | — |  |  | — |  |  | 1 |
Equity securities—domestic | 3 |  |  | — |  |  | — |  |  | — |  |  | 3 |
Debt securities—domestic government | 3 |  |  | — |  |  | — |  |  | — |  |  | 3 |
Price risk management activities: (1) (4) |  |  |  |  |  |  |  |  |
Electricity | — |  |  | 93 |  |  | 63 |  |  | — |  |  | 156 |
Natural gas | — |  |  | 225 |  |  | 6 |  |  | — |  |  | 231 |
| $ | 166 |  |  | $ | 337 |  |  | $ | 69 |  |  | $ | 11 |  |  | $ | 583 |
Liabilities: |  |  |  |  |  |  |  |  |
Price risk management activities: (1) (4) |  |  |  |  |  |  |  |  |
Electricity | $ | — |  |  | $ | 53 |  |  | $ | 93 |  |  | $ | — |  |  | $ | 146 |
Natural gas | — |  |  | 39 |  |  | 8 |  |  | — |  |  | 47 |
| $ | — |  |  | $ | 92 |  |  | $ | 101 |  |  | $ | — |  |  | $ | 193 |
(1)Activities are subject to regulation, with certain gains and losses deferred pursuant to regulatory accounting and included in regulatory assets or regulatory liabilities as appropriate. (2)Assets are measured at NAV as a practical expedient and not subject to hierarchy level classification disclosure. (3)Excludes insurance policies of $31 million, which are recorded at cash surrender value. (4)For further information regarding price risk management derivatives, see Note 6, Risk Management.
| December 31, 2021
| Level 1 |  | Level 2 |  | Level 3 |  | Other(2) |  | Total
Assets: |  |  |  |  |  |  |  |  |
Cash equivalents | $ | 44 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 44 |
Nuclear decommissioning trust: (1) |  |  |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |  |  |
Domestic government | 9 |  |  | 10 |  |  | — |  |  | — |  |  | 19 |
Corporate credit | — |  |  | 14 |  |  | — |  |  | — |  |  | 14 |
Money market funds measured at NAV (2) | — |  |  | — |  |  | — |  |  | 14 |  |  | 14 |
Non-qualified benefit plan trust: (3) |  |  |  |  |  |  |  |  |
Money market funds | 1 |  |  | — |  |  | — |  |  | — |  |  | 1 |
Equity securities—domestic | 4 |  |  | — |  |  | — |  |  | — |  |  | 4 |
Debt securities—domestic government | 4 |  |  | — |  |  | — |  |  | — |  |  | 4 |
Price risk management activities: (1) (4) |  |  |  |  |  |  |  |  |
Electricity | — |  |  | 16 |  |  | 1 |  |  | — |  |  | 17 |
Natural gas | — |  |  | 115 |  |  | 5 |  |  | — |  |  | 120 |
| $ | 62 |  |  | $ | 155 |  |  | $ | 6 |  |  | $ | 14 |  |  | $ | 237 |
Liabilities: |  |  |  |  |  |  |  |  |
Price risk management activities: (1) (4) |  |  |  |  |  |  |  |  |
Electricity | $ | — |  |  | $ | 33 |  |  | $ | 90 |  |  | $ | — |  |  | $ | 123 |
Natural gas | — |  |  | 13 |  |  | 1 |  |  | — |  |  | 14 |
| $ | — |  |  | $ | 46 |  |  | $ | 91 |  |  | $ | — |  |  | $ | 137 |
(1)Activities are subject to regulation, with certain gains and losses deferred pursuant to regulatory accounting and included in regulatory assets or regulatory liabilities as appropriate. (2)Assets are measured at NAV as a practical expedient and not subject to hierarchy level classification disclosure. (3)Excludes insurance policies of $36 million, which are recorded at cash surrender value. (4)For further information regarding price risk management derivatives, see Note 6, Risk Management. The fair values of the Company’s pension plan assets and other postretirement benefit plan assets by asset category are as follows (in millions):
| Level 1 |  | Level 2 |  | Level 3 |  | Other * |  | Total
As of December 31, 2022: |  |  |  |  |  |  |  |  |
Defined Benefit Pension Plan assets: |  |  |  |  |  |  |  |  |
Equity securities—Domestic | $ | 16 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 16 |
Investments measured at NAV: |  |  |  |  |  |  |  |  |
Money market funds | — |  |  | — |  |  | — |  |  | 4 |  |  | 4 |
Collective trust funds | — |  |  | — |  |  | — |  |  | 525 |  |  | 525 |
Private equity funds | — |  |  | — |  |  | — |  |  | 2 |  |  | 2 |
| $ | 16 |  |  | $ | — |  |  | $ | — |  |  | $ | 531 |  |  | $ | 547 |
Other Postretirement Benefit Plans assets: |  |  |  |  |  |  |  |  |
Money market funds | $ | 4 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 4 |
Equity securities: |  |  |  |  |  |  |  |  |
Domestic | — |  |  | 2 |  |  | — |  |  | — |  |  | 2 |
International | 3 |  |  | — |  |  | — |  |  | — |  |  | 3 |
Debt securities—Domestic | — |  |  | 4 |  |  | — |  |  | — |  |  | 4 |
Investments measured at NAV: |  |  |  |  |  |  |  |  |
Money market funds | — |  |  | — |  |  | — |  |  | 5 |  |  | 5 |
Collective trust funds | — |  |  | — |  |  | — |  |  | 3 |  |  | 3 |
| $ | 7 |  |  | $ | 6 |  |  | $ | — |  |  | $ | 8 |  |  | $ | 21 |
As of December 31, 2021: |  |  |  |  |  |  |  |  |
Defined Benefit Pension Plan assets: |  |  |  |  |  |  |  |  |
Equity securities—Domestic | $ | 25 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 25 |
Investments measured at NAV: |  |  |  |  |  |  |  |  |
Money market funds | — |  |  | — |  |  | — |  |  | 6 |  |  | 6 |
Collective trust funds | — |  |  | — |  |  | — |  |  | 764 |  |  | 764 |
Private equity funds | — |  |  | — |  |  | — |  |  | 5 |  |  | 5 |
| $ | 25 |  |  | $ | — |  |  | $ | — |  |  | $ | 775 |  |  | $ | 800 |
Other Postretirement Benefit Plans assets: |  |  |  |  |  |  |  |  |
Money market funds | $ | 3 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 3 |
Equity securities: |  |  |  |  |  |  |  |  |
Domestic | — |  |  | 4 |  |  | — |  |  | — |  |  | 4 |
International | 10 |  |  | — |  |  | — |  |  | — |  |  | 10 |
Debt securities—Domestic government | — |  |  | 6 |  |  | — |  |  | — |  |  | 6 |
Investments measured at NAV: |  |  |  |  |  |  |  |  |
Money market funds | — |  |  | — |  |  | — |  |  | 6 |  |  | 6 |
Collective trust funds | — |  |  | — |  |  | — |  |  | 8 |  |  | 8 |
| $ | 13 |  |  | $ | 10 |  |  | $ | — |  |  | $ | 14 |  |  | $ | 37 |
*Assets are measured at NAV as a practical expedient and not subject to hierarchy level classification disclosure. These assets are listed in the totals of the fair value hierarchy to permit the reconciliation to amounts presented in the financial statements.
Schedule of Defined Benefit Plans Disclosures [Table Text Block] | The following tables provide certain information with respect to the Company’s defined benefit pension plan, other postretirement benefits, and NQBP as of and for the years ended December 31, 2022 and 2021. Information related to the Other NQBP is not included in the following tables (dollars in millions):
| Defined Benefit Pension Plan |  | Other Postretirement Benefits |  | Non-Qualified Benefit Plans
| 2022 |  | 2021 |  | 2022 |  | 2021 |  | 2022 |  | 2021
Benefit obligation: |  |  |  |  |  |  |  |  |  |  |
As of January 1 | $ | 972 |  |  | $ | 1,010 |  |  | $ | 71 |  |  | $ | 76 |  |  | $ | 27 |  |  | $ | 28 |
Service cost | 17 |  |  | 19 |  |  | 1 |  |  | 2 |  |  | — |  |  | — |
Interest cost | 28 |  |  | 27 |  |  | 2 |  |  | 2 |  |  | 1 |  |  | 1 |
Actuarial gain | (255) |  |  | (26) |  |  | (15) |  |  | (5) |  |  | (7) |  |  | — |
Benefit payments | (69) |  |  | (47) |  |  | (4) |  |  | (5) |  |  | (3) |  |  | (2) |
Administrative expenses | (3) |  |  | (3) |  |  | — |  |  | — |  |  | — |  |  | — |
Plan amendment | 5 |  |  | (8) |  |  | 1 |  |  | 1 |  |  | — |  |  | — |
Plan settlements | — |  |  | — |  |  | (13) |  |  | — |  |  | — |  |  | — |
As of December 31 | $ | 695 |  |  | $ | 972 |  |  | $ | 43 |  |  | $ | 71 |  |  | $ | 18 |  |  | $ | 27 |
Fair value of plan assets: |  |  |  |  |  |  |  |  |  |  |
As of January 1 | $ | 800 |  |  | $ | 753 |  |  | $ | 37 |  |  | $ | 35 |  |  | $ | 21 |  |  | $ | 19 |
Actual return on plan assets | (181) |  |  | 97 |  |  | (6) |  |  | 4 |  |  | (2) |  |  | 1 |
Company contributions | — |  |  | — |  |  | 7 |  |  | 3 |  |  | 3 |  |  | 3 |
Benefit payments | (69) |  |  | (47) |  |  | (4) |  |  | (5) |  |  | (3) |  |  | (2) |
Administrative expenses | (3) |  |  | (3) |  |  | — |  |  | — |  |  | — |  |  | — |
Plan settlements | — |  |  | — |  |  | (13) |  |  | — |  |  | — |  |  | — |
As of December 31 | $ | 547 |  |  | $ | 800 |  |  | $ | 21 |  |  | $ | 37 |  |  | $ | 19 |  |  | $ | 21 |
Unfunded position as of December 31 | $ | (148) |  |  | $ | (172) |  |  | $ | (22) |  |  | $ | (34) |  |  | $ | 1 |  |  | $ | (6) |
Accumulated benefit plan obligation as of December 31 | $ | 656 |  |  | $ | 885 |  |  | N/A |  | N/A |  | $ | 17 |  |  | $ | 23 |
Classification in consolidated balance sheet: |  |  |  |  |  |  |  |  |  |  |
Noncurrent asset | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 19 |  |  | $ | 21 |
Current liability | — |  |  | — |  |  | (1) |  |  | — |  |  | (2) |  |  | (2) |
Noncurrent liability | (148) |  |  | (172) |  |  | (21) |  |  | (34) |  |  | (16) |  |  | (25) |
Net asset (liability) | $ | (148) |  |  | $ | (172) |  |  | $ | (22) |  |  | $ | (34) |  |  | $ | 1 |  |  | $ | (6) |
Amounts included in comprehensive income: |  |  |  |  |  |  |  |  |  |  |
Net actuarial loss (gain) | $ | (28) |  |  | $ | (78) |  |  | $ | (8) |  |  | $ | (7) |  |  | $ | (7) |  |  | $ | (1) |
Net settlement gain | — |  |  | — |  |  | 11 |  |  | — |  |  | — |  |  | — |
Net prior service credit | 5 |  |  | (9) |  |  | — |  |  | — |  |  | — |  |  | — |
Amortization of net actuarial loss | (15) |  |  | (22) |  |  | — |  |  | — |  |  | (1) |  |  | (1) |
Amortization of prior service credit | 2 |  |  | — |  |  | — |  |  | 1 |  |  | — |  |  | — |
| $ | (36) |  |  | $ | (109) |  |  | $ | 3 |  |  | $ | (6) |  |  | $ | (8) |  |  | $ | (2) |
Amounts included in AOCL: * |  |  |  |  |  |  |  |  |  |  |
Net actuarial loss (gain) | $ | 96 |  |  | $ | 139 |  |  | $ | (7) |  |  | $ | (3) |  |  | $ | 6 |  |  | $ | 14 |
Prior service cost | (1) |  |  | (8) |  |  | — |  |  | (7) |  |  | — |  |  | — |
| $ | 95 |  |  | $ | 131 |  |  | $ | (7) |  |  | $ | (10) |  |  | $ | 6 |  |  | $ | 14 |
* Amounts included in AOCL related to the Company’s defined benefit pension plan and other postretirement benefits are classified as Regulatory assets or liabilities as future recoverability is expected from retail customers. Significant actuarial gains (losses) experienced that resulted in changes in projected benefit obligation included the following: •For the defined benefit pension plan, actuarial gains and losses due to demographic experience, including assumption changes, were gains of $255 million and $26 million, and the changes between actual and expected return on plan assets were a loss of $227 million and a gain of $52 million, for the years ended December 31, 2022 and 2021, respectively. •For the other postretirement benefits, actuarial gains and losses due to demographic experience, including assumption changes, were gains of $15 million and $5 million, and the changes between actual and expected return on plan assets were a loss of $6 million and a gain of $2 million, for each of the years ended December 31, 2022 and 2021, respectively.
Schedule of Net Benefit Costs [Table Text Block] | Net periodic benefit cost consists of the following for the years ended December 31 (in millions):
| Defined Benefit Pension Plan |  | Other Postretirement Benefits |  | Non-Qualified Benefit Plans
| 2022 |  | 2021 |  | 2020 |  | 2022 |  | 2021 |  | 2020 |  | 2022 |  | 2021 |  | 2020
Service cost | $ | 17 |  |  | $ | 19 |  |  | $ | 17 |  |  | $ | 1 |  |  | $ | 2 |  |  | $ | 2 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest cost on benefit obligation | 28 |  |  | 27 |  |  | 31 |  |  | 2 |  |  | 2 |  |  | 2 |  |  | 1 |  |  | 1 |  |  | 1 |
Expected return on plan assets | (46) |  |  | (45) |  |  | (44) |  |  | (2) |  |  | (2) |  |  | (2) |  |  | — |  |  | — |  |  | — |
Amortization of prior service credit | (2) |  |  | — |  |  | — |  |  | — |  |  | (1) |  |  | (1) |  |  | — |  |  | — |  |  | — |
Amortization of net actuarial loss | 15 |  |  | 22 |  |  | 17 |  |  | — |  |  | — |  |  | — |  |  | 1 |  |  | 1 |  |  | 1 |
Settlement gain | — |  |  | — |  |  | — |  |  | (11) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net periodic benefit cost | $ | 12 |  |  | $ | 23 |  |  | $ | 21 |  |  | $ | (10) |  |  | $ | 1 |  |  | $ | 1 |  |  | $ | 2 |  |  | $ | 2 |  |  | $ | 2 |
Employee Benefits Assumptions [Table] | The following assumptions were used in determining benefit obligations and net period benefit costs:
| Defined Benefit Pension Plan |  | Other Postretirement Benefits |  |  | Non-Qualified Benefit Plans
| 2022 |  | 2021 |  | 2022 |  |  | 2021 |  |  | 2022 |  | 2021
Assumptions used to determine benefit obligations: |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate | 5.42 | % |  | 2.92 | % |  | 5.47% - |  |  | 2.75% - |  |  | 5.42 | % |  | 2.92 | %
|  |  |  |  | 5.51 | % |  |  | 3.11 | % |  |  |  |  |
Rate of compensation increase | 4.21 | % |  | 4.26 | % |  | 4.04 | % |  |  | 4.13 | % |  |  | 5.10 | % |  | 4.10 | %
Assumptions used to determine net periodic benefit cost: |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate | 2.92 | % |  | 2.64 | % |  | 2.75% - |  |  | 2.22% - |  |  | 2.92 | % |  | 2.64 | %
|  |  |  |  | 3.11 | % |  |  | 2.92 | % |  |  |  |  |
Rate of compensation increase | 4.26 | % |  | 3.65 | % |  | 4.13 | % |  |  | 4.58 | % |  |  | 4.10 | % |  | 4.10 | %
Long-term rate of return on plan assets | 6.75 | % |  | 6.88 | % |  | 4.83 | % |  |  | 5.04 | % |  |  | N/A |  | N/A
Schedule of Expected Benefit Payments [Table Text Block] | The following table summarizes the benefits expected to be paid to participants in each of the next five years and in the aggregate for the five years thereafter (in millions):
| Payments Due
| 2023 |  | 2024 |  | 2025 |  | 2026 |  | 2027 |  | 2028 - 2032
Defined benefit pension plan | $ | 59 |  |  | $ | 54 |  |  | $ | 54 |  |  | $ | 54 |  |  | $ | 53 |  |  | $ | 262 |
Other postretirement benefits | 4 |  |  | 4 |  |  | 5 |  |  | 5 |  |  | 3 |  |  | 14 |
Non-qualified benefit plans | 2 |  |  | 2 |  |  | 2 |  |  | 2 |  |  | 2 |  |  | 8 |
Total | $ | 65 |  |  | $ | 60 |  |  | $ | 61 |  |  | $ | 61 |  |  | $ | 58 |  |  | $ | 284 |

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- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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