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Regulatory Assets and Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2021
Regulatory Assets [Line Items] |
Schedule of Regulatory Liabilities [Table Text Block] | Regulatory assets and liabilities consist of the following (dollars in millions):
| Remaining Amortization Period |  | As of December 31,
| 2021 |  | 2020
| Earning a Return (1) |  | Not Earning a Return |  | Total |  | Total
Regulatory assets: |  |  |  |  |  |  |  |  |
Price risk management | (2) |  | $ | — |  |  | $ | 55 |  |  | $ | 55 |  |  | $ | 124 |
Pension plan | (3) |  | — |  |  | 131 |  |  | 131 |  |  | 240 |
Debt issuance costs | 2049 |  | — |  |  | 23 |  |  | 23 |  |  | 25 |
Trojan decommissioning activities | 2059 |  | — |  |  | 90 |  |  | 90 |  |  | 95 |
February 2021 ice storm and damage | (4) |  | 67 |  |  | — |  |  | 67 |  |  | — |
Power cost adjustment mechanism | (5) |  | 29 |  |  | — |  |  | 29 |  |  | — |
2020 Labor Day wildfire | (4) |  | 45 |  |  | — |  |  | 45 |  |  | 15 |
COVID-19 | (4) |  | 36 |  |  | — |  |  | 36 |  |  | 10 |
Other | Various |  | 58 |  |  | 23 |  |  | 81 |  |  | 83 |
Total regulatory assets |  |  | $ | 235 |  |  | $ | 322 |  |  | $ | 557 |  |  | $ | 592 |
Regulatory liabilities: |  |  |  |  |  |  |  |  |
Asset retirement removal costs | (6) |  | $ | 1,047 |  |  | $ | — |  |  | $ | 1,047 |  |  | $ | 1,016 |
Deferred income taxes | (7) |  | 208 |  |  | — |  |  | 208 |  |  | 239 |
Asset retirement obligations | (6) |  | 43 |  |  | — |  |  | 43 |  |  | 37 |
Price risk management | (2) |  | — |  |  | 55 |  |  | 55 |  |  | 18 |
Other | Various |  | 57 |  |  | 56 |  |  | 113 |  |  | 82 |
Total regulatory liabilities |  |  | $ | 1,355 |  |  | $ | 111 |  |  | $ | 1,466 |  |  | $ | 1,392 |
(1)Earning a return includes either interest on the regulatory asset or liability, or inclusion of the regulatory asset or liability as an increase or decrease to rate base at the allowed rate of return. (2)No amortization period in accordance with ratemaking and cost recovery processes authorized by the OPUC, PGE recognizes a regulatory asset or liability to defer unrealized losses or gains on derivative instruments until settlement. (3)Recovery expected over the average service life of employees. (4)Amortization period not yet determined. (5)Amortization period not yet determined. A final determination regarding the 2021 PCAM results will be made by the OPUC through a public filing and review in 2022. The OPUC has significant discretion in making the final determination of recovery. The OPUC’s conclusion of overall prudence, including an earnings review, could result in a portion, or all, of PGE’s deferral being disallowed for recovery. Such disallowance would be recognized as a charge to earnings. (6)Recovery or refund expected over the estimated lives of the underlying assets and treated as a reduction to rate base. (7)Refund expected primarily through amortization using the average rate assumption method over the average life of the underlying assets and treated as a reduction to rate base.
Schedule of Regulatory Assets [Table Text Block] | Regulatory assets and liabilities consist of the following (dollars in millions):
| Remaining Amortization Period |  | As of December 31,
| 2021 |  | 2020
| Earning a Return (1) |  | Not Earning a Return |  | Total |  | Total
Regulatory assets: |  |  |  |  |  |  |  |  |
Price risk management | (2) |  | $ | — |  |  | $ | 55 |  |  | $ | 55 |  |  | $ | 124 |
Pension plan | (3) |  | — |  |  | 131 |  |  | 131 |  |  | 240 |
Debt issuance costs | 2049 |  | — |  |  | 23 |  |  | 23 |  |  | 25 |
Trojan decommissioning activities | 2059 |  | — |  |  | 90 |  |  | 90 |  |  | 95 |
February 2021 ice storm and damage | (4) |  | 67 |  |  | — |  |  | 67 |  |  | — |
Power cost adjustment mechanism | (5) |  | 29 |  |  | — |  |  | 29 |  |  | — |
2020 Labor Day wildfire | (4) |  | 45 |  |  | — |  |  | 45 |  |  | 15 |
COVID-19 | (4) |  | 36 |  |  | — |  |  | 36 |  |  | 10 |
Other | Various |  | 58 |  |  | 23 |  |  | 81 |  |  | 83 |
Total regulatory assets |  |  | $ | 235 |  |  | $ | 322 |  |  | $ | 557 |  |  | $ | 592 |
Regulatory liabilities: |  |  |  |  |  |  |  |  |
Asset retirement removal costs | (6) |  | $ | 1,047 |  |  | $ | — |  |  | $ | 1,047 |  |  | $ | 1,016 |
Deferred income taxes | (7) |  | 208 |  |  | — |  |  | 208 |  |  | 239 |
Asset retirement obligations | (6) |  | 43 |  |  | — |  |  | 43 |  |  | 37 |
Price risk management | (2) |  | — |  |  | 55 |  |  | 55 |  |  | 18 |
Other | Various |  | 57 |  |  | 56 |  |  | 113 |  |  | 82 |
Total regulatory liabilities |  |  | $ | 1,355 |  |  | $ | 111 |  |  | $ | 1,466 |  |  | $ | 1,392 |
(1)Earning a return includes either interest on the regulatory asset or liability, or inclusion of the regulatory asset or liability as an increase or decrease to rate base at the allowed rate of return. (2)No amortization period in accordance with ratemaking and cost recovery processes authorized by the OPUC, PGE recognizes a regulatory asset or liability to defer unrealized losses or gains on derivative instruments until settlement. (3)Recovery expected over the average service life of employees. (4)Amortization period not yet determined. (5)Amortization period not yet determined. A final determination regarding the 2021 PCAM results will be made by the OPUC through a public filing and review in 2022. The OPUC has significant discretion in making the final determination of recovery. The OPUC’s conclusion of overall prudence, including an earnings review, could result in a portion, or all, of PGE’s deferral being disallowed for recovery. Such disallowance would be recognized as a charge to earnings. (6)Recovery or refund expected over the estimated lives of the underlying assets and treated as a reduction to rate base. (7)Refund expected primarily through amortization using the average rate assumption method over the average life of the underlying assets and treated as a reduction to rate base.

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- Definition Tabular disclosure of assets that are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 715 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501251&loc=d3e52485-110419 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44264-110382 + Details
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- Definition Tabular disclosure of regulatory liabilities. Detailed information about liabilities that result from rate actions of a regulator. Rate actions of a regulator can impose a liability on a regulated enterprise resulting in a regulatory liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 405 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
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