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Income Taxes (Narrative) (Detail) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Mar. 31, 2022
Income Taxes [Line Items] |  |  |  |  |  |  |
Income tax expense (benefit) |  | $ 182 | $ 70 |  | $ 432 | $ 61 |
Income tax (benefit) expense from discontinued operations |  | 1,200 | 53 |  | 1,300 | 185 |
Cove Point |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |
Income tax (benefit) expense from discontinued operations |  | 7 | $ 32 |  | 31 | $ 93 |
Hope Gas Inc |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |
Percentage of equity interests sold |  |  | 100.00% |  |  | 100.00% |
Income tax expense (benefit) |  |  |  | $ 90 |  |  |
East Ohio, PSNC and Questar Gas |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |
Income tax expense (benefit) |  |  |  |  | 29 |  |
Discontinued operations, deferred tax liabilities | $ 939 | $ 939 |  |  | $ 939 |  |
East Ohio, PSNC and Questar Gas | Cove Point |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |
Percentage of noncontrolling limited partnership interest retained | 50.00% | 50.00% |  |  | 50.00% |  |
East Ohio, PSNC and Questar Gas | Cove Point | BHE |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |
Income tax (benefit) expense from discontinued operations | $ 278 |  |  |  |  |  |
Questar Gas Company |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |
Percentage of equity interests sold |  |  |  |  |  |  | 100.00%

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- Definition Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-10 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.7) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479360/740-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482659/740-20-45-2 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 3A -Publisher FASB -URI https://asc.fasb.org//1943274/2147483475/205-20-45-3A Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483499/205-20-50-5B Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5C -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483499/205-20-50-5C Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org//1943274/2147483475/205-20-45-3B Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483475/205-20-45-4 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483499/205-20-50-1 + Details
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