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SHARE-BASED COMPENSATION - SHARE-BASED COMPENSATION EXPENSE/ OPTIONS (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |
Number of shares available for future grants (in shares) | 8,918,154 |  |
Number of shares authorized for issuance (in shares) | 8,918,154 |  |
Share-based compensation expense, before income taxes | $ 71,000,000 | $ 61,000,000 | $ 58,000,000
Income tax benefit | (9,000,000) | (17,000,000) | (16,000,000)
Share-based Payment Arrangement, Expense, after Tax | 62,000,000 | 44,000,000 | 42,000,000
Capitalized share-based compensation cost | 12,000,000 | 11,000,000 | 9,000,000
Excess income tax (benefit) deficiency | $ (6,000,000) | $ (3,000,000) | $ (9,000,000)
Non-qualified stock options granted (in shares) | 326,574 | 439,796 | 445,240
Stock option exercise period (in years) | 3 years |  |
Weighted-average fair value for options granted (in dollars per share) | $ 17.50 | $ 10.99 | $ 9.54
Stock price volatility (as a percent) | 27.35% | 26.08% | 26.57%
Expected term (in years) | 5 years 4 months 9 days | 5 years 4 months 9 days | 5 years 4 months 9 days
Risk-free rate of return (as a percent) | 3.89% | 1.40% | 0.41%
Annual dividend yield (as a percent) | 2.98% | 3.33% | 3.38%
Common shares under options |  |  |
Beginning balance (in shares) | 1,433,224 |  |
Options granted in period (in shares) | 326,574 | 439,796 | 445,240
Ending balance (in shares) | 1,759,798 | 1,433,224 |
Vested at period end (in shares) | 1,759,798 |  |
Exercisable at period end (in shares) | 991,618 |  |
Weighted- average exercise price |  |  |
Beginning balance (in dollars per share) | $ 63.51 |  |
Granted (in dollars per share) | 76.86 |  |
Ending balance (in dollars per share) | 65.99 | $ 63.51 |
Vested at period end, Weighted- average exercise price (in dollars per share) | 65.99 |  |
Exercisable at period end, Weighted- average exercise price (in dollars per share) | $ 63.02 |  |
Outstanding at period end, Weighted- average remaining contractual term | 7 years 1 month 20 days |  |
Vested at period end, Weighted- average remaining contractual term | 7 years 1 month 20 days |  |
Exercisable at period end, Weighted- average remaining contractual term | 6 years 3 months 18 days |  |
Outstanding at period end, Aggregate intrinsic value | $ 15,000,000 |  |
Vested at period end, Aggregate intrinsic value | 15,000,000 |  |
Exercisable at period end, Aggregate intrinsic value | 12,000,000 |  |
Aggregate intrinsic value of options exercised | 0 | $ 1,700,000 | $ 1,400,000
Weighted-average per share fair value for nonqualified stock options granted (in dollars per share) |  | $ 66.00 | $ 61.90
Cash received from exercise of options |  | $ 4,000,000 | $ 5,000,000
SDG&E |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |
Share-based compensation expense, before income taxes | 13,000,000 | 11,000,000 | 10,000,000
Income tax benefit | (2,000,000) | (3,000,000) | (3,000,000)
Share-based Payment Arrangement, Expense, after Tax | 11,000,000 | 8,000,000 | 7,000,000
Capitalized share-based compensation cost | 7,000,000 | 6,000,000 | 5,000,000
Excess income tax (benefit) deficiency | (1,000,000) | 0 | (1,000,000)
SoCalGas |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |
Share-based compensation expense, before income taxes | 18,000,000 | 17,000,000 | 14,000,000
Income tax benefit | (3,000,000) | (5,000,000) | (4,000,000)
Share-based Payment Arrangement, Expense, after Tax | 15,000,000 | 12,000,000 | 10,000,000
Capitalized share-based compensation cost | 5,000,000 | 5,000,000 | 4,000,000
Excess income tax (benefit) deficiency | $ (1,000,000) | $ 0 | $ (1,000,000)
Share-based Payment Arrangement, Option |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |
Expiration period | 10 years |  |
Awards Granted In 2020 and 2019 | Share-based Payment Arrangement, Option |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |
Award vesting period | 3 years |  |
Awarded during or after 2015 | Performance Shares |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |
Award vesting period | 3 years |  |
Awarded During Or After 2014 |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |
Award vesting rights maximum additional award | 100.00% |  |
Awards Granted in 2019 | Restricted Stock Units (RSUs), Service-based |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |
Award vesting period | 3 years |  |
Minimum | Restricted Stock Units (RSUs), Service-based |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |
Award requisite service period | 3 years |  |

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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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