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Schedule I - Condensed Financial Information of Parent (Details) | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Sep. 30, 2016 USD ($) | Jun. 30, 2016 USD ($) | Mar. 31, 2016 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2017 USD ($) | Aug. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ 1,091,000,000 | $ 1,091,000,000 | $ 1,091,000,000 |  |  | $ 96,000,000 | $ 96,000,000 |  |  | $ 161,000,000 | $ 96,000,000 | $ 161,000,000 | $ 132,000,000 | $ 1,091,000,000 |  | $ 96,000,000 | $ 161,000,000 | $ 132,000,000
Other current assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 202,000,000 |  | 177,000,000 |  |
Total current assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,729,000,000 |  | 2,123,000,000 |  |
Other long-term assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 374,000,000 |  | 416,000,000 |  |
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 52,580,000,000 |  | 51,319,000,000 |  |
Liabilities and equity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,393,000,000 |  | 1,307,000,000 |  |
Current portion of long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 481,000,000 |  | 981,000,000 |  |
Other current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,265,000,000 |  | 991,000,000 |  |
Total current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,068,000,000 |  | 5,912,000,000 |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,642,000,000 |  | 10,175,000,000 |  |
Total equity |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,866,000,000 |  | 14,187,000,000 | 13,388,000,000 | 12,982,000,000
Total liabilities and equity |  |  |  |  |  |  |  |  |  |  |  |  |  | 52,580,000,000 |  | $ 51,319,000,000 |  |
Condensed Statements of Income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income from affiliates |  |  | 3,220,000,000 | $ 3,672,000,000 | $ 2,965,000,000 | 2,463,000,000 | 2,884,000,000 | $ 3,767,000,000 | $ 2,777,000,000 | 2,440,000,000 | 12,320,000,000 | 11,869,000,000 | 11,524,000,000 |  |  |  |  |
Operating expenses and interest expense |  |  |  |  |  |  |  |  |  |  | 10,827,000,000 | 9,777,000,000 | 9,516,000,000 |  |  |  |  |
Operating income |  |  | (16,000,000) | 561,000,000 | 469,000,000 | 479,000,000 | 566,000,000 | 695,000,000 | 381,000,000 | 448,000,000 | 1,493,000,000 | 2,092,000,000 | 2,008,000,000 |  |  |  |  |
Income tax expense (benefit) |  |  |  |  |  |  |  |  |  |  | 281,000,000 | 177,000,000 | 486,000,000 |  |  |  |  |
Income from continuing operations |  |  | (534,000,000) | 501,000,000 | 309,000,000 | 392,000,000 | 347,000,000 | 451,000,000 | 310,000,000 | 305,000,000 | 668,000,000 | 1,413,000,000 | 1,082,000,000 |  |  |  |  |
Income from discontinued operations, net of tax |  |  | 0 | 0 | 0 | 0 | 13,000,000 | 0 | (2,000,000) | 1,000,000 | 0 | 12,000,000 | 35,000,000 |  |  |  |  |
Condensed Statements of Comprehensive Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income, net of tax |  |  |  |  |  |  |  |  |  |  | 10,000,000 | 3,000,000 | 2,000,000 |  |  |  |  |
Comprehensive income |  |  |  |  |  |  |  |  |  |  | 575,000,000 | 1,314,000,000 | 1,022,000,000 |  |  |  |  |
Condensed Statements of Cash Flows: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net cash provided by operating activities |  |  |  |  |  |  |  |  |  |  | 3,587,000,000 | 3,256,000,000 | 4,509,000,000 |  |  |  |  |
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt issued |  |  |  |  |  |  |  |  |  |  | 2,233,000,000 | 397,000,000 | 1,420,000,000 |  |  |  |  |
Repayments of Long-term Debt |  |  |  |  |  |  |  |  |  |  | (1,285,000,000) | (220,000,000) | (762,000,000) |  |  |  |  |
Short-term debt financing, net |  |  |  |  |  |  |  |  |  |  | 1,084,000,000 | 611,000,000 | (572,000,000) |  |  |  |  |
Payments for stock-based compensation |  |  |  |  |  |  |  |  |  |  | (393,000,000) | (237,000,000) | (197,000,000) |  |  |  |  |
Receipts from stock option exercises |  |  |  |  |  |  |  |  |  |  | 215,000,000 | 135,000,000 | 128,000,000 |  |  |  |  |
Dividends paid |  |  |  |  |  |  |  |  |  |  | (707,000,000) | (626,000,000) | (544,000,000) |  |  |  |  |
Net cash provided by (used in) financing activities |  |  |  |  |  |  |  |  |  |  | 1,007,000,000 | 95,000,000 | (588,000,000) |  |  |  |  |
Net cash used in investing activities |  |  |  |  |  |  |  |  |  |  | (3,599,000,000) | (3,416,000,000) | (3,892,000,000) |  |  |  |  |
Net increase (decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  |  |  | 995,000,000 | (65,000,000) | 29,000,000 |  |  |  |  |
Cash and cash equivalents, beginning of year | 1,091,000,000 |  |  |  |  | 96,000,000 |  |  |  | 161,000,000 | 96,000,000 | 161,000,000 | 132,000,000 |  |  |  |  |
Cash and cash equivalents, end of year |  | 1,091,000,000 | 1,091,000,000 |  |  |  | 96,000,000 |  |  |  | 1,091,000,000 | 96,000,000 | 161,000,000 |  |  |  |  |
Senior Notes Due 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.75% |  |
Multi-year credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,250,000,000 |  |  |  |
Outstanding borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,139,000,000) |  | $ (538,000,000) |  |
Amount available |  |  |  |  |  |  |  |  |  |  |  |  |  | 111,000,000 |  |  |  |
Weighted average interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.97% |  |
Senior notes | 2.125% Senior notes due 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount |  |  |  |  |  | $ 400,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  | 2.125% |  |  |  |  |  |  |  |  |  |  |  |
Senior notes | 2.40% Senior notes due 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 400,000,000 |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.40% |  |  |
Senior notes | 2.95% Senior notes due 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 400,000,000 |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.95% |  |  |  |
Edison International Parent and Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | 524,000,000 | 524,000,000 | 524,000,000 |  |  | $ 6,000,000 | 6,000,000 |  |  | 7,000,000 | 6,000,000 | 7,000,000 | 8,000,000 | $ 524,000,000 |  | $ 6,000,000 | 7,000,000 | 8,000,000
Other current assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 340,000,000 |  | 261,000,000 |  |
Total current assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 864,000,000 |  | 267,000,000 |  |
Investments in subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,659,000,000 |  | 13,459,000,000 |  |
Deferred income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  | 500,000,000 |  | 646,000,000 |  |
Other long-term assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 91,000,000 |  | 108,000,000 |  |
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,114,000,000 |  | 14,480,000,000 |  |
Liabilities and equity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,139,000,000 |  | 539,000,000 |  |
Current portion of long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | 400,000,000 |  |
Other current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  | 467,000,000 |  | 484,000,000 |  |
Total current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,606,000,000 |  | 1,423,000,000 |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,193,000,000 |  | 397,000,000 |  |
Other long-term liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  | 644,000,000 |  | 664,000,000 |  |
Total equity |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,671,000,000 |  | 11,996,000,000 |  |
Total liabilities and equity |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,114,000,000 |  | 14,480,000,000 |  |
Condensed Statements of Income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income from affiliates |  |  |  |  |  |  |  |  |  |  | 0 | 6,000,000 | 3,000,000 |  |  |  |  |
Operating expenses and interest expense |  |  |  |  |  |  |  |  |  |  | 92,000,000 | 86,000,000 | 78,000,000 |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  |  |  | (92,000,000) | (80,000,000) | (75,000,000) |  |  |  |  |
Equity in earnings of subsidiaries |  |  |  |  |  |  |  |  |  |  | 739,000,000 | 1,337,000,000 | 1,025,000,000 |  |  |  |  |
Income before income taxes |  |  |  |  |  |  |  |  |  |  | 647,000,000 | 1,257,000,000 | 950,000,000 |  |  |  |  |
Income tax expense (benefit) |  |  |  |  |  |  |  |  |  |  | 82,000,000 | (42,000,000) | (35,000,000) |  |  |  |  |
Income from continuing operations |  |  |  |  |  |  |  |  |  |  | 565,000,000 | 1,299,000,000 | 985,000,000 |  |  |  |  |
Income from discontinued operations, net of tax |  |  |  |  |  |  |  |  |  |  | 0 | 12,000,000 | 35,000,000 |  |  |  |  |
Net income |  |  |  |  |  |  |  |  |  |  | 565,000,000 | 1,311,000,000 | 1,020,000,000 |  |  |  |  |
Condensed Statements of Comprehensive Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  |  |  | 565,000,000 | 1,311,000,000 | 1,020,000,000 |  |  |  |  |
Other comprehensive income, net of tax |  |  |  |  |  |  |  |  |  |  | 10,000,000 | 3,000,000 | 2,000,000 |  |  |  |  |
Comprehensive income |  |  |  |  |  |  |  |  |  |  | 575,000,000 | 1,314,000,000 | 1,022,000,000 |  |  |  |  |
Condensed Statements of Cash Flows: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net cash provided by operating activities |  |  |  |  |  |  |  |  |  |  | 462,000,000 | 493,000,000 | 641,000,000 |  |  |  |  |
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt issued |  |  |  |  |  |  |  |  |  |  | 798,000,000 | 400,000,000 | 0 |  |  |  |  |
Long-term debt issuance costs |  |  |  |  |  |  |  |  |  |  | (5,000,000) | (3,000,000) | 0 |  |  |  |  |
Repayments of Long-term Debt |  |  |  |  |  |  |  |  |  |  | (400,000,000) | 0 | 0 |  |  |  |  |
Payable due to affiliates |  |  |  |  |  |  |  |  |  |  | 8,000,000 | 34,000,000 | 54,000,000 |  |  |  |  |
Short-term debt financing, net |  |  |  |  |  |  |  |  |  |  | 600,000,000 | (108,000,000) | 26,000,000 |  |  |  |  |
Payments for stock-based compensation |  |  |  |  |  |  |  |  |  |  | (260,000,000) | (95,000,000) | (114,000,000) |  |  |  |  |
Receipts from stock option exercises |  |  |  |  |  |  |  |  |  |  | 144,000,000 | 51,000,000 | 72,000,000 |  |  |  |  |
Dividends paid |  |  |  |  |  |  |  |  |  |  | (707,000,000) | (626,000,000) | (544,000,000) |  |  |  |  |
Net cash provided by (used in) financing activities |  |  |  |  |  |  |  |  |  |  | 178,000,000 | (347,000,000) | (506,000,000) |  |  |  |  |
Capital contributions to affiliate |  |  |  |  |  |  |  |  |  |  | (122,000,000) | (147,000,000) | (30,000,000) |  |  |  |  |
Loans to affiliate |  |  |  |  |  |  |  |  |  |  | 0 | 0 | (106,000,000) |  |  |  |  |
Net cash used in investing activities |  |  |  |  |  |  |  |  |  |  | (122,000,000) | (147,000,000) | (136,000,000) |  |  |  |  |
Net increase (decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  |  |  | 518,000,000 | (1,000,000) | (1,000,000) |  |  |  |  |
Cash and cash equivalents, beginning of year | 524,000,000 |  |  |  |  | 6,000,000 |  |  |  | 7,000,000 | 6,000,000 | 7,000,000 | 8,000,000 |  |  |  |  |
Cash and cash equivalents, end of year |  | 524,000,000 | 524,000,000 |  |  |  | 6,000,000 |  |  |  | 524,000,000 | 6,000,000 | 7,000,000 |  |  |  |  |
Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends received from consolidated subsidiaries |  |  |  |  |  |  |  |  |  |  | 573,000,000 | 701,000,000 | 758,000,000 |  |  |  |  |
Related Party Transactions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current receivables due from affiliates |  |  |  |  |  |  |  |  |  |  |  |  |  | 256,000,000 |  | 262,000,000 |  |
Current payables due to affiliates |  |  |  |  |  |  |  |  |  |  |  |  |  | 235,000,000 |  | 221,000,000 |  |
Long-term receivables due from affiliate |  |  |  |  |  |  |  |  |  |  |  |  |  | 81,000,000 |  | 103,000,000 |  |
Long-term payables due to affiliates |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 200,000,000 |  | $ 243,000,000 |  |
Edison International Parent and Other | Senior Notes Due 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.75% |  |
Senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 400,000,000 |  |
Edison International Parent and Other | Credit Facility July 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment |  |  |  |  | 1,250,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Edison International Parent and Other | Revolving credit facility maturing in July 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Covenant requirement, consolidated debt to total capitalization, ratio |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.65 |  |  |  |
Consolidated debt to total capitalization, ratio |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.51 |  |  |  |
Edison International Parent and Other | SCE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expenses from services provided by SCE |  |  |  |  |  |  |  |  |  |  | 3,000,000 | 3,000,000 | 3,000,000 |  |  |  |  |
Interest expense from loans due to affiliates |  |  |  |  |  |  |  |  |  |  | 5,000,000 | 3,000,000 | 6,000,000 |  |  |  |  |
Edison International Parent and Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liabilities and equity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current portion of long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,000,000 |  | 402,000,000 |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,214,000,000 |  | 421,000,000 |  |
SCE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | 515,000,000 | 515,000,000 | 515,000,000 |  |  | 39,000,000 | 39,000,000 |  |  | 26,000,000 | 39,000,000 | 26,000,000 | 38,000,000 | 515,000,000 |  | 39,000,000 | 26,000,000 | 38,000,000
Other current assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 160,000,000 |  | 148,000,000 |  |
Total current assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,087,000,000 |  | 2,031,000,000 |  |
Other long-term assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 237,000,000 |  | 232,000,000 |  |
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 51,515,000,000 |  | 50,891,000,000 |  |
Liabilities and equity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,238,000,000 |  | 769,000,000 |  |
Current portion of long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 479,000,000 |  | 579,000,000 |  |
Other current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,224,000,000 |  | 729,000,000 |  |
Total current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,887,000,000 |  | 4,707,000,000 |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,428,000,000 |  | 9,754,000,000 |  |
Total equity |  |  |  |  |  |  |  |  |  |  |  |  |  | 14,672,000,000 |  | 14,483,000,000 | 13,672,000,000 | $ 13,282,000,000
Total liabilities and equity |  |  |  |  |  |  |  |  |  |  |  |  |  | 51,515,000,000 |  | 50,891,000,000 |  |
Condensed Statements of Income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income from affiliates |  |  | 3,193,000,000 | 3,652,000,000 | 2,953,000,000 | 2,456,000,000 | 2,874,000,000 | 3,752,000,000 | 2,768,000,000 | 2,435,000,000 | 12,254,000,000 | 11,830,000,000 | 11,485,000,000 |  |  |  |  |
Operating expenses and interest expense |  |  |  |  |  |  |  |  |  |  | 10,656,000,000 | 9,613,000,000 | 9,405,000,000 |  |  |  |  |
Operating income |  |  | (4,000,000) | $ 578,000,000 | $ 517,000,000 | 507,000,000 | 594,000,000 | $ 721,000,000 | $ 429,000,000 | 472,000,000 | 1,598,000,000 | 2,217,000,000 | 2,080,000,000 |  |  |  |  |
Income tax expense (benefit) |  |  |  |  |  |  |  |  |  |  | (30,000,000) | 256,000,000 | 507,000,000 |  |  |  |  |
Condensed Statements of Comprehensive Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income, net of tax |  |  |  |  |  |  |  |  |  |  | 1,000,000 | 2,000,000 | 6,000,000 |  |  |  |  |
Condensed Statements of Cash Flows: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net cash provided by operating activities |  |  |  |  |  |  |  |  |  |  | 3,725,000,000 | 3,523,000,000 | 4,624,000,000 |  |  |  |  |
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt issued |  |  |  |  |  |  |  |  |  |  | 1,445,000,000 | 0 | 1,413,000,000 |  |  |  |  |
Repayments of Long-term Debt |  |  |  |  |  |  |  |  |  |  | (882,000,000) | (217,000,000) | (761,000,000) |  |  |  |  |
Short-term debt financing, net |  |  |  |  |  |  |  |  |  |  | 469,000,000 | 719,000,000 | (619,000,000) |  |  |  |  |
Payments for stock-based compensation |  |  |  |  |  |  |  |  |  |  | (86,000,000) | (127,000,000) | (78,000,000) |  |  |  |  |
Receipts from stock option exercises |  |  |  |  |  |  |  |  |  |  | 48,000,000 | 76,000,000 | 68,000,000 |  |  |  |  |
Dividends paid |  |  |  |  |  |  |  |  |  |  | (697,000,000) | (824,000,000) | (874,000,000) |  |  |  |  |
Net cash provided by (used in) financing activities |  |  |  |  |  |  |  |  |  |  | 243,000,000 | (219,000,000) | (812,000,000) |  |  |  |  |
Net cash used in investing activities |  |  |  |  |  |  |  |  |  |  | (3,492,000,000) | (3,291,000,000) | (3,824,000,000) |  |  |  |  |
Net increase (decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  |  |  | 476,000,000 | 13,000,000 | (12,000,000) |  |  |  |  |
Cash and cash equivalents, beginning of year | 515,000,000 |  |  |  |  | $ 39,000,000 |  |  |  | $ 26,000,000 | 39,000,000 | 26,000,000 | 38,000,000 |  |  |  |  |
Cash and cash equivalents, end of year |  | 515,000,000 | $ 515,000,000 |  |  |  | $ 39,000,000 |  |  |  | $ 515,000,000 | $ 39,000,000 | $ 26,000,000 |  |  |  |  |
Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum percentage of weighted-average common equity component authorization, set by CPUC (as a percent) |  |  |  |  |  |  |  |  |  |  | 48.00% |  |  |  |  |  |  |
Weighted-average common equity component authorization, set by CPUC remaining over number of months (in months) |  |  |  |  |  |  |  |  |  |  | 13 months |  |  |  |  |  |  |
After-tax charge excused from capital structure |  |  |  |  |  |  |  |  |  |  | $ 448,000,000 |  |  |  |  |  |  |
Period for calculation of weighted average common equity component (months) |  |  |  |  |  |  |  |  |  |  | 13 months |  |  |  |  |  |  |
Weighted-average common equity component of total capitalization (as a percent) |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |
Capacity to pay additional dividends |  |  |  |  |  |  |  |  |  |  | $ 511,000,000 |  |  |  |  |  |  |
Restriction on net assets |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 14,200,000,000 |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.56% |  |  |  |
SCE | Pro forma |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average common equity component authorization, set by CPUC remaining over number of months (in months) |  |  |  |  |  |  |  |  |  |  | 13 months |  |  |  |  |  |  |
Period for calculation of weighted average common equity component (months) |  |  |  |  |  |  |  |  |  |  | 13 months |  |  |  |  |  |  |
Weighted-average common equity component of total capitalization (as a percent) |  |  |  |  |  |  |  |  |  |  | 50.10% |  |  |  |  |  |  |
SCE | Multi-year credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,750,000,000 |  |  |  |
Outstanding borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,238,000,000) |  |  |  |
Amount available |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,413,000,000 |  |  |  |
Weighted average interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.46% |  |  |  |
Line of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings from credit facility |  | 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit | SCE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings from credit facility |  | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent event | Edison International Parent and Other | Term Loan Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis points | 60.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent event | Line of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment on borrowings | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent event | Line of credit | SCE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment on borrowings | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-party note receivable converted into capital contribution |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of note |  |  |  |  |  |  |  |  |  |  | $ 184,000,000 |  |  |  |  |  |  |
Commercial paper | Multi-year credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (639,000,000) |  |  |  |
Weighted average interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.70% |  |  |  |
Commercial paper | SCE | Multi-year credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (769,000,000) |  |
Weighted average interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.75% |  | 0.90% |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared but not paid |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 197,000,000 |  | $ 177,000,000 | 156,000,000 |
Common Stock | SCE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared but not paid |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 212,000,000 |  | $ 0 | $ 0 |

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- Definition Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4569616-111683 + Details
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- Definition Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5C -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721675-107760 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(12)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e1012-107759 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721525-107759 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721523-107759 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e957-107759 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 + Details
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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(12)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(10)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66022249&loc=d3e33749-111570 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)(f)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(23)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(25)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(32)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.21) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3574-108585 + Details
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