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Schedule I - Condensed Financial Information of Parent (Details) |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |  |  |
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Jan. 01, 2020 USD ($) | May 31, 2020 USD ($) shares | Dec. 31, 2020 USD ($) shares | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($) | Dec. 31, 2020 USD ($) | Apr. 30, 2020 USD ($) | Dec. 31, 2019 USD ($) | May 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ 68,000,000 |  | $ 87,000,000 |  |  | $ 68,000,000 | $ 68,000,000 |  |  |  |  | $ 87,000,000 | $ 68,000,000 |  | $ 87,000,000 |  | $ 68,000,000 |  |  |
Other current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 224,000,000 |  | 188,000,000 |  |  |
Total current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,061,000,000 |  | 3,560,000,000 |  |  |
Other long-term assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 860,000,000 |  | 648,000,000 |  |  |
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 69,372,000,000 |  | 64,382,000,000 |  |  |
Liabilities and equity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,398,000,000 |  | 550,000,000 |  |  |
Current portion of long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,029,000,000 |  | 479,000,000 |  |  |
Other current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,612,000,000 |  | 1,388,000,000 |  |  |
Total current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,277,000,000 |  | 5,523,000,000 |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 19,632,000,000 |  | 17,864,000,000 |  |  |
Total equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,949,000,000 |  | 15,496,000,000 |  | $ 12,652,000,000 | $ 13,866,000,000
Total liabilities and equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 69,372,000,000 |  | 64,382,000,000 |  |  |
Condensed Statements of Income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income from affiliates |  |  | 3,157,000,000 | $ 4,644,000,000 | $ 2,987,000,000 | 2,790,000,000 | 2,970,000,000 | $ 3,741,000,000 | $ 2,812,000,000 | $ 2,824,000,000 |  | 13,578,000,000 | 12,347,000,000 | $ 12,657,000,000 |  |  |  |  |  |
Operating, interest and other expenses |  |  |  |  |  |  |  |  |  |  |  | 12,361,000,000 | 10,572,000,000 | 13,209,000,000 |  |  |  |  |  |
Operating income (loss) |  |  | 794,000,000 | (379,000,000) | 500,000,000 | 302,000,000 | 287,000,000 | 636,000,000 | 500,000,000 | 352,000,000 |  | 1,217,000,000 | 1,775,000,000 | (552,000,000) |  |  |  |  |  |
Income tax benefit |  |  |  |  |  |  |  |  |  |  |  | (305,000,000) | (278,000,000) | (739,000,000) |  |  |  |  |  |
Income (loss) from continuing operations |  |  |  |  |  |  |  |  |  |  |  | 871,000,000 | 1,405,000,000 | (350,000,000) |  |  |  |  |  |
Income from discontinued operations, net of tax |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 34,000,000 |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  |  |  |  | 739,000,000 | 1,284,000,000 | (423,000,000) |  |  |  |  |  |
Condensed Statements of Comprehensive Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  |  |  |  | 739,000,000 | 1,284,000,000 | (423,000,000) |  |  |  |  |  |
Other comprehensive loss, net of tax |  |  |  |  |  |  |  |  |  |  |  | 0 | (9,000,000) | (7,000,000) |  |  |  |  |  |
Comprehensive income (loss) attributable to Edison International |  |  |  |  |  |  |  |  |  |  |  | 739,000,000 | 1,275,000,000 | (430,000,000) |  |  |  |  |  |
Condensed Statements of Cash Flows: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net cash provided by operating activities |  |  |  |  |  |  |  |  |  |  |  | 1,263,000,000 | (307,000,000) | 3,177,000,000 |  |  |  |  |  |
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt issued |  |  |  |  |  |  |  |  |  |  |  | 3,073,000,000 | 3,696,000,000 | 3,237,000,000 |  |  |  |  |  |
Long-term debt repaid or repurchased |  |  |  |  |  |  |  |  |  |  |  | (1,099,000,000) | (82,000,000) | (654,000,000) |  |  |  |  |  |
Short-term debt borrowed |  |  |  |  |  |  |  |  |  |  |  | 2,994,000,000 | 1,750,000,000 | 0 |  |  |  |  |  |
Repayments of Short-term Debt |  |  |  |  |  |  |  |  |  |  |  | (1,126,000,000) | (1,750,000,000) | 0 |  |  |  |  |  |
Common stock issued |  |  |  |  |  |  |  |  |  |  |  | 912,000,000 | 2,391,000,000 | 0 |  |  |  |  |  |
Commercial paper and other short-term borrowing (repayments), net |  |  |  |  |  |  |  |  |  |  |  | 304,000,000 | (172,000,000) | (1,611,000,000) |  |  |  |  |  |
Dividends paid |  |  |  |  |  |  |  |  |  |  |  | (928,000,000) | (810,000,000) | (788,000,000) |  |  |  |  |  |
Net cash provided by financing activities |  |  |  |  |  |  |  |  |  |  |  | 3,727,000,000 | 4,903,000,000 | 82,000,000 |  |  |  |  |  |
Net cash used in investing activities |  |  |  |  |  |  |  |  |  |  |  | (4,971,000,000) | (4,678,000,000) | (4,239,000,000) |  |  |  |  |  |
Cash and cash equivalents, beginning of year | 68,000,000 |  |  |  |  | 68,000,000 |  |  |  |  |  | 68,000,000 |  |  |  |  |  |  |  |
Cash and cash equivalents, end of year |  |  | 87,000,000 |  |  |  | 68,000,000 |  |  |  |  | 87,000,000 | 68,000,000 |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt covenant capitalization ratio |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.70 |  |  |  |  |
Actual debt to capitalization ratio |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.59 |  |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term Debt, Other Disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,800,000,000 |  |  |  |  |
Outstanding borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,350,000,000 |  |  |  |  |
Amount available |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,291,000,000 |  |  |  |  |
Senior notes | 4.125% senior notes due in 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.125% |  |  |  |  |
Senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 550,000,000 |  |  |  |  |
SCE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | 24,000,000 |  | 55,000,000 |  |  | 24,000,000 | 24,000,000 |  |  |  |  | 24,000,000 | 24,000,000 |  | 55,000,000 |  | 24,000,000 |  |  |
Other current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 216,000,000 |  | 184,000,000 |  |  |
Total current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,017,000,000 |  | 3,530,000,000 |  |  |
Other long-term assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 843,000,000 |  | 595,000,000 |  |  |
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 69,286,000,000 |  | 64,273,000,000 |  |  |
Liabilities and equity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,268,000,000 |  | 550,000,000 |  |  |
Current portion of long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,029,000,000 |  | 79,000,000 |  |  |
Other current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,294,000,000 |  | 1,298,000,000 |  |  |
Total current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,831,000,000 |  | 5,059,000,000 |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16,499,000,000 |  | 15,132,000,000 |  |  |
Total equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18,650,000,000 |  | 17,827,000,000 |  | 13,785,000,000 | 14,672,000,000
Total liabilities and equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 69,286,000,000 |  | 64,273,000,000 |  |  |
Condensed Statements of Income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income from affiliates |  |  | 3,151,000,000 | 4,635,000,000 | 2,980,000,000 | 2,780,000,000 | 2,958,000,000 | 3,732,000,000 | 2,800,000,000 | 2,816,000,000 |  | 13,546,000,000 | 12,306,000,000 | 12,611,000,000 |  |  |  |  |  |
Operating, interest and other expenses |  |  |  |  |  |  |  |  |  |  |  | 12,368,000,000 | 10,461,000,000 | 13,017,000,000 |  |  |  |  |  |
Operating income (loss) |  |  | 678,000,000 | $ (364,000,000) | $ 548,000,000 | 316,000,000 | 325,000,000 | $ 649,000,000 | $ 513,000,000 | 358,000,000 |  | 1,178,000,000 | 1,845,000,000 | (406,000,000) |  |  |  |  |  |
Income tax benefit |  |  |  |  |  |  |  |  |  |  |  | (277,000,000) | (229,000,000) | (696,000,000) |  |  |  |  |  |
Condensed Statements of Comprehensive Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive loss, net of tax |  |  |  |  |  |  |  |  |  |  |  | (2,000,000) | (11,000,000) | (4,000,000) |  |  |  |  |  |
Condensed Statements of Cash Flows: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net cash provided by operating activities |  |  |  |  |  |  |  |  |  |  |  | 1,427,000,000 | (91,000,000) | 3,191,000,000 |  |  |  |  |  |
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt issued |  |  |  |  |  |  |  |  |  |  |  | 2,676,000,000 | 2,306,000,000 | 2,692,000,000 |  |  |  |  |  |
Long-term debt repaid or repurchased |  |  |  |  |  |  |  |  |  |  |  | (699,000,000) | (82,000,000) | (639,000,000) |  |  |  |  |  |
Short-term debt borrowed |  |  |  |  |  |  |  |  |  |  |  | 2,194,000,000 | 750,000,000 | 0 |  |  |  |  |  |
Repayments of Short-term Debt |  |  |  |  |  |  |  |  |  |  |  | (326,000,000) | (750,000,000) | 0 |  |  |  |  |  |
Commercial paper and other short-term borrowing (repayments), net |  |  |  |  |  |  |  |  |  |  |  | 175,000,000 | (171,000,000) | (520,000,000) |  |  |  |  |  |
Dividends paid |  |  |  |  |  |  |  |  |  |  |  | (1,450,000,000) | (521,000,000) | (909,000,000) |  |  |  |  |  |
Net cash provided by financing activities |  |  |  |  |  |  |  |  |  |  |  | 3,699,000,000 | 4,771,000,000 | 616,000,000 |  |  |  |  |  |
Net cash used in investing activities |  |  |  |  |  |  |  |  |  |  |  | (5,094,000,000) | (4,678,000,000) | $ (4,300,000,000) |  |  |  |  |  |
Cash and cash equivalents, beginning of year | $ 24,000,000 |  |  |  |  | 24,000,000 |  |  |  |  |  | 24,000,000 |  |  |  |  |  |  |  |
Cash and cash equivalents, end of year |  |  | 55,000,000 |  |  |  | 24,000,000 |  |  |  |  | 55,000,000 | $ 24,000,000 |  |  |  |  |  |  |
Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum percentage of weighted-average common equity component authorization, set by CPUC (as a percent) | 52.00% |  |  |  |  |  |  |  |  |  |  |  | 48.00% | 45.20% |  |  |  |  |  |
Wildfire related charge incurred after tax |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,800,000,000 |  |  |  |  |  |
Weighted-average common equity component of total capitalization percent with CPUC waiver |  |  |  |  |  |  |  |  |  |  |  |  |  | 48.70% |  |  |  |  |  |
Waiver threshold percent (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 47.70% |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt covenant capitalization ratio |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.65 |  |  |  |  |
Actual debt to capitalization ratio |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.51 |  |  |  |  |
Related Party Transactions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Insurance receivable from affiliate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 268,000,000 |  | 0 |  |  |
SCE | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term Debt, Other Disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,300,000,000 |  |  |  |  |
Outstanding borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,220,000,000 |  |  |  |  |
Amount available |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,921,000,000 |  |  |  |  |
SCE | Term loan credit agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 475,000,000 |  |  |  |  |
SCE | Multi-year credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term Debt, Other Disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,000,000,000 |  |  |  |  |
Outstanding borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 725,000,000 |  |  |  |  |
Amount available |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,116,000,000 |  |  |  |  |
Edison International | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term Debt, Other Disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,500,000,000 |  |  |  |  |
Outstanding borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 130,000,000 |  |  |  |  |
Amount available |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,370,000,000 |  |  |  |  |
Edison International | Multi-year credit facilities | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.42% |  |  |  |  |
Short-term Debt, Other Disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,500,000,000 |  |  |  |  |
Outstanding borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 130,000,000 |  |  |  |  |
Amount available |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,370,000,000 |  |  |  |  |
EME | Affiliated Entity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds |  |  |  |  |  |  |  |  |  |  |  | 132,000,000 |  |  |  |  |  |  |  |
Edison International Parent and Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liabilities and equity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current portion of long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | 400,000,000 |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,133,000,000 |  | 2,732,000,000 |  |  |
Edison International Parent and Other | Multi-year credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term Debt, Other Disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |
Edison International Parent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ 15,000,000 |  | 3,000,000 |  |  | 15,000,000 | 15,000,000 |  |  | 97,000,000 | $ 97,000,000 | 15,000,000 | $ 97,000,000 | $ 97,000,000 | 3,000,000 |  | 15,000,000 |  | $ 97,000,000 | $ 524,000,000
Other current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 43,000,000 |  | 260,000,000 |  |  |
Total current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 46,000,000 |  | 275,000,000 |  |  |
Investments in subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 17,706,000,000 |  | 16,530,000,000 |  |  |
Deferred income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 675,000,000 |  | 608,000,000 |  |  |
Other long-term assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 71,000,000 |  | 76,000,000 |  |  |
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18,498,000,000 |  | 17,489,000,000 |  |  |
Liabilities and equity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 129,000,000 |  | 0 |  |  |
Current portion of long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | 400,000,000 |  |  |
Other current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 636,000,000 |  | 481,000,000 |  |  |
Total current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 765,000,000 |  | 881,000,000 |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,133,000,000 |  | 2,733,000,000 |  |  |
Other long-term liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 552,000,000 |  | 572,000,000 |  |  |
Total equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14,048,000,000 |  | 13,303,000,000 |  |  |
Total liabilities and equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 18,498,000,000 |  | 17,489,000,000 |  |  |
Condensed Statements of Income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income from affiliates |  |  |  |  |  |  |  |  |  |  |  | 1,000,000 | 5,000,000 | 0 |  |  |  |  |  |
Operating, interest and other expenses |  |  |  |  |  |  |  |  |  |  |  | 189,000,000 | 150,000,000 | 98,000,000 |  |  |  |  |  |
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |  | (188,000,000) | (145,000,000) | (98,000,000) |  |  |  |  |  |
Equity in earnings (loss) of subsidiaries |  |  |  |  |  |  |  |  |  |  |  | 851,000,000 | 1,385,000,000 | (376,000,000) |  |  |  |  |  |
Income (loss) before income taxes |  |  |  |  |  |  |  |  |  |  |  | 663,000,000 | 1,240,000,000 | (474,000,000) |  |  |  |  |  |
Income tax benefit |  |  |  |  |  |  |  |  |  |  |  | (76,000,000) | (44,000,000) | (17,000,000) |  |  |  |  |  |
Income (loss) from continuing operations |  |  |  |  |  |  |  |  |  |  |  | 739,000,000 | 1,284,000,000 | (457,000,000) |  |  |  |  |  |
Income from discontinued operations, net of tax |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 34,000,000 |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  |  |  |  | 739,000,000 | 1,284,000,000 | (423,000,000) |  |  |  |  |  |
Condensed Statements of Comprehensive Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  |  |  |  | 739,000,000 | 1,284,000,000 | (423,000,000) |  |  |  |  |  |
Other comprehensive loss, net of tax |  |  |  |  |  |  |  |  |  |  |  | 0 | (9,000,000) | (7,000,000) |  |  |  |  |  |
Comprehensive income (loss) attributable to Edison International |  |  |  |  |  |  |  |  |  |  |  | 739,000,000 | 1,275,000,000 | (430,000,000) |  |  |  |  |  |
Condensed Statements of Cash Flows: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net cash provided by operating activities |  |  |  |  |  |  |  |  |  |  |  | 1,171,000,000 | 181,000,000 | 785,000,000 |  |  |  |  |  |
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt issued |  |  |  |  |  |  |  |  |  |  |  | 400,000,000 | 1,399,000,000 | 549,000,000 |  |  |  |  |  |
Long-term debt issuance costs |  |  |  |  |  |  |  |  |  |  |  | (3,000,000) | (9,000,000) | (4,000,000) |  |  |  |  |  |
Long-term debt repaid or repurchased |  |  |  |  |  |  |  |  |  |  | 0 | (400,000,000) | 0 |  |  |  |  |  |  |
Short-term debt borrowed |  |  |  |  |  |  |  |  |  |  |  | 800,000,000 | 1,000,000,000 | 0 |  |  |  |  |  |
Repayments of Short-term Debt |  |  |  |  |  |  |  |  |  |  |  | (800,000,000) | (1,000,000,000) | 0 |  |  |  |  |  |
Common stock issued |  |  |  |  |  |  |  |  |  |  |  | 912,000,000 | 2,391,000,000 | 0 |  |  |  |  |  |
Payable due to affiliates |  |  |  |  |  |  |  |  |  |  |  | 135,000,000 | 5,000,000 | 13,000,000 |  |  |  |  |  |
Commercial paper and other short-term borrowing (repayments), net |  |  |  |  |  |  |  |  |  |  |  | 129,000,000 | (1,000,000) | (1,141,000,000) |  |  |  |  |  |
Payments for stock-based compensation |  |  |  |  |  |  |  |  |  |  |  | (3,000,000) | (27,000,000) | (24,000,000) |  |  |  |  |  |
Receipts from stock option exercises |  |  |  |  |  |  |  |  |  |  |  | 21,000,000 | 39,000,000 | 14,000,000 |  |  |  |  |  |
Dividends paid |  |  |  |  |  |  |  |  |  |  |  | (928,000,000) | (810,000,000) | (788,000,000) |  |  |  |  |  |
Net cash provided by financing activities |  |  |  |  |  |  |  |  |  |  |  | 263,000,000 | 2,987,000,000 | (1,381,000,000) |  |  |  |  |  |
Capital contributions to affiliate |  |  |  |  |  |  |  |  |  |  |  | (1,446,000,000) | (3,258,000,000) | (10,000,000) |  |  |  |  |  |
Dividends from affiliate |  |  |  |  |  |  |  |  |  |  |  | 0 | 8,000,000 | 179,000,000 |  |  |  |  |  |
Net cash used in investing activities |  |  |  |  |  |  |  |  |  |  |  | (1,446,000,000) | (3,250,000,000) | 169,000,000 |  |  |  |  |  |
Net decrease in cash and cash equivalents |  |  |  |  |  |  |  |  |  |  |  | (12,000,000) | (82,000,000) | (427,000,000) |  |  |  |  |  |
Cash and cash equivalents, beginning of year | $ 15,000,000 |  |  |  |  | 15,000,000 |  |  |  | $ 97,000,000 | $ 97,000,000 | 15,000,000 | 97,000,000 | 524,000,000 |  |  |  |  |  |
Cash and cash equivalents, end of year |  |  | $ 3,000,000 |  |  |  | $ 15,000,000 |  |  |  |  | 3,000,000 | 15,000,000 | 97,000,000 |  |  |  |  |  |
Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends received from consolidated subsidiaries |  |  |  |  |  |  |  |  |  |  |  | 1,300,000,000 | 400,000,000 | 788,000,000 |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt covenant capitalization ratio |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.70 |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued (in shares) | shares |  | 14,181,882 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds received |  | $ 800,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Offering expenses |  | $ 14,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Insurance receivable from affiliate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 43,000,000 |  | 272,000,000 |  |  |
Current payables due to affiliates |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 323,000,000 |  | 198,000,000 |  |  |
Long-term insurance receivables due from affiliate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 68,000,000 |  | 73,000,000 |  |  |
Long-term payables due to affiliates |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 219,000,000 |  | $ 213,000,000 |  |  |
Edison International Parent | Multi-year credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.42% |  |  |  |  |
Short-term Debt, Other Disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,500,000,000 |  |  |  |  |
Outstanding borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 130,000,000 |  |  |  |  |
Amount available |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,370,000,000 |  |  |  |  |
Edison International Parent | Senior notes | 4.95% Senior notes due 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 400,000,000 |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.95% |  |  |  |
Edison International Parent | Senior notes | 2.125% Senior notes due 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.125% | 2.125% |  |  |  |
Senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 400,000,000 | $ 400,000,000 |  |  |  |
Edison International Parent | Senior notes | 2.40% Senior notes due 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.40% |  |  |  |  |
Senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 400,000,000 |  |  |  |  |
Edison International Parent | Senior notes | 3.125% Senior notes due 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.125% |  |  |  |  |
Senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 300,000,000 |  |  |  |  |
Edison International Parent | Senior notes | 2.95% Senior notes due 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.95% |  |  |  |  |
Senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 400,000,000 |  |  |  |  |
Edison International Parent | Senior notes | 3.55% senior notes due 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000 |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.55% |  |  |  |  |
Edison International Parent | Senior notes | 5.75% senior notes due in 2027 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.75% |  |  |  |  |
Senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 600,000,000 |  |  |  |  |
Edison International Parent | Senior notes | Term loan credit agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount |  |  |  |  |  | $ 800,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  | 1.125% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Edison International Parent | SCE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expenses from services provided by SCE |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 | 2,000,000 | 2,000,000 |  |  |  |  |  |
Interest expense from loans due to affiliates |  |  |  |  |  |  |  |  |  |  |  | $ 4,000,000 | $ 5,000,000 | $ 5,000,000 |  |  |  |  |  |
Edison International Parent | ATM |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued (in shares) | shares |  |  | 0 |  |  |  |  |  |  |  |  | 391,501 | 2,824,261 |  |  |  |  |  |  |
Proceeds received |  |  |  |  |  |  |  |  |  |  |  | $ 27,000,000 | $ 198,000,000 |  |  |  |  |  |  |
Offering expenses |  |  |  |  |  |  |  |  |  |  |  | 300,000 | 2,000,000 |  |  |  |  |  |  |
Aggregate sale price (up to) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,500,000,000 |  |
Aggregate sales price remaining |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,300,000,000 |  |  |  |  |
Edison International Parent | 401(K) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds received |  |  |  |  |  |  |  |  |  |  |  | $ 99,000,000 | $ 41,000,000 |  |  |  |  |  |  |
Issuance of new common stock (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  | 1,644,500 | 595,200 |  |  |  |  |  |  |
Edison International Parent | In lieu of dividend payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds received |  |  |  |  |  |  |  |  |  |  |  | $ 17,000,000 | $ 8,000,000 |  |  |  |  |  |  |
Issuance of new common stock (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  | 280,707 | 125,481 |  |  |  |  |  |  |
Edison International Parent | Internal Programs, Stock Compensation Awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds received |  |  |  |  |  |  |  |  |  |  |  | $ 16,000,000 | $ 22,000,000 |  |  |  |  |  |  |
Issuance of new common stock (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  | 387,425 | 423,569 |  |  |  |  |  |  |
Edison International Parent | Optional cash investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds received |  |  |  |  |  |  |  |  |  |  |  | $ 2,000,000 |  |  |  |  |  |  |  |
Issuance of new common stock (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  | 35,999 |  |  |  |  |  |  |  |

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