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Employee Benefits (Tables)
 12 Months Ended
Dec. 31, 2021
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):
 20212020
  NQBPOther NQBPTotalNQBPOther NQBPTotal
Non-qualified benefit plan trust assets$21 $24 $45 $19 $23 $42 
Non-qualified benefit plan liabilities *25 70 95 26 75 101 
*    For the NQBP, excludes the current portion of $2 million in 2021 and 2020, 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,
  20212020
ActualTarget *ActualTarget *
Defined Benefit Pension Plan:
Equity securities61 %60 %67 %65 %
Debt securities39 40 33 35 
Total100 %100 %100 %100 %
Other Postretirement Benefit Plans:
Equity securities59 %57 %60 %57 %
Debt securities41 43 40 43 
Total100 %100 %100 %100 %
Non-Qualified Benefits Plans:
Equity securities8 %7 %17 %12 %
Debt securities13 14 6 11 
Insurance contracts79 79 77 77 
Total100 %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, 2021
Level 1Level 2Level 3
Other(2)
Total
Assets:
Cash equivalents$44 $— $— $— $44 
Nuclear decommissioning trust: (1)
Debt securities:
Domestic government9 10 — — 19 
Corporate credit— 14 — — 14 
Money market funds measured at NAV (2)
— — — 14 14 
Non-qualified benefit plan trust: (3)
Money market funds1 — — — 1 
Equity securities—domestic4 — — — 4 
Debt securities—domestic government4 — — — 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.
December 31, 2020
Level 1Level 2Level 3
Other(2)
Total
Assets:
Cash equivalents$255 $— $— $— $255 
Nuclear decommissioning trust: (1)
Debt securities:
Domestic government9 11 — — 20 
Corporate credit— 13 — — 13 
Money market funds measured at NAV (2)
— — — 12 12 
Non-qualified benefit plan trust: (3)
Money market funds1 — — — 1 
Equity securities—domestic7 — — — 7 
Debt securities—domestic government1 — — — 1 
Price risk management activities: (1) (4)
Electricity— 4 4 — 8 
Natural gas— 36 1 — 37 
$273 $64 $5 $12 $354 
Liabilities:
Price risk management activities: (1) (4)
Electricity$— $5 $141 $— $146 
Natural gas— 4 1 — 5 
$— $9 $142 $— $151 
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(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 $33 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 1Level 2Level 3Other *Total
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 
International10 — — — 10 
Debt securities—Domestic— 6 — — 6 
Investments measured at NAV:
Money market funds— — — 6 6 
Collective trust funds— — — 8 8 
$13 $10 $— $14 $37 
As of December 31, 2020:
Defined Benefit Pension Plan assets:
Equity securities—Domestic$49 $— $— $— $49 
Investments measured at NAV:
Money market funds— — — 6 6 
Collective trust funds— — — 692 692 
Private equity funds— — — 6 6 
$49 $— $— $704 $753 
Other Postretirement Benefit Plans assets:
Money market funds$4 $— $— $— $4 
Equity securities:
Domestic— 3 — — 3 
International9 — — — 9 
Debt securities—Domestic government— 5 — — 5 
Investments measured at NAV:
Money market funds— — — 5 5 
Collective trust funds— — — 9 9 
$13 $8 $— $14 $35 
*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, 2021 and 2020. Information related to the Other NQBP is not included in the following tables (dollars in millions):

 Defined Benefit Pension PlanOther Postretirement BenefitsNon-Qualified
Benefit Plans
  202120202021202020212020
Benefit obligation:
As of January 1$1,010 $905 $76 $71 $28 $26 
Service cost19 17 2 2 — — 
Interest cost27 31 2 2 1 1 
Participants’ contributions— — — — — — 
Actuarial loss (gain)(26)104 (5)4 — 3 
Benefit payments(47)(44)(5)(4)(2)(2)
Administrative expenses(3)(3)— — — — 
Plan amendment(8)— 1 1 — — 
Curtailment gain— — — — — — 
As of December 31$972 $1,010 $71 $76 $27 $28 
Fair value of plan assets:
As of January 1$753 $695 $35 $34 $19 $17 
Actual return on plan assets97 105 4 2 1 1 
Company contributions— — 3 3 3 3 
Participants’ contributions— — — — — — 
Benefit payments(47)(44)(5)(4)(2)(2)
Administrative expenses(3)(3)— — — — 
As of December 31$800 $753 $37 $35 $21 $19 
Unfunded position as of December 31$(172)$(257)$(34)$(41)$(6)$(9)
Accumulated benefit plan obligation as of December 31$885 $907 N/AN/A$23 $24 
Classification in consolidated balance sheet:
Noncurrent asset$— $— $— $— $21 $19 
Current liability— — — — (2)(2)
Noncurrent liability(172)(257)(34)(41)(25)(26)
Net liability$(172)$(257)$(34)$(41)$(6)$(9)
Amounts included in comprehensive income:
Net actuarial loss (gain)$(78)$43 $(7)$4 $(1)$3 
Net prior service credit(9)1 — — — — 
Amortization of net actuarial loss(22)(17)— — (1)(1)
Amortization of prior service credit— — 1 1 — — 
$(109)$27 $(6)$5 $(2)$2 
Amounts included in AOCL:*
Net actuarial loss (gain)$139 $239 $(3)$5 $14 $15 
Prior service cost(8)1 (7)(8)— — 
$131 $240 $(10)$(3)$14 $15 
* 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 a gain of $26 million and loss of $104 million, and the changes between actual and expected return on plan assets were gains of $52 million and $61 million for the years ended December 31, 2021 and 2020, respectively.
•For the other postretirement benefits, actuarial gains and losses due to demographic experience, including assumption changes, were a gain of $5 million and loss of $5 million, and the changes between actual and expected return on plan assets were gains of $2 million and $1 million for each of the years ended December 31, 2021 and 2020, 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
  202120202019202120202019202120202019
Service cost$19 $17 $16 $2 $2 $2 $— $— $— 
Interest cost on benefit obligation27 31 34 2 2 3 1 1 1 
Expected return on plan assets(45)(44)(40)(2)(2)(2)— — — 
Amortization of prior service credit— — — (1)(1)— — — — 
Amortization of net actuarial loss22 17 10 — — — 1 1 1 
Curtailment gain— — — — — (2)— — — 
Net periodic benefit cost$23 $21 $20 $1 $1 $1 $2 $2 $2 
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
  202220232024202520262027 - 2031
Defined benefit pension plan$59 $59 $58 $57 $58 $277 
Other postretirement benefits5 5 6 6 5 19 
Non-qualified benefit plans2 3 2 2 2 11 
Total$66 $67 $66 $65 $65 $307