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Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Movement in Valuation and Qualifying Accounts |  |  |  |
Balance at Beginning of Period | $ 61.7 | $ 72.2 | $ 70.0 |
Charged to Costs and Expenses | 33.6 | 41.9 | 43.8 |
Charged to Other Accounts | 0.0 | 0.0 | 0.0 |
Deductions | 33.5 | 52.4 | 41.6 |
Balance at End of Period | 61.8 | 61.7 | 72.2 |
Deferred tax assets, loss and credit carryforwards | 1,418.0 | 1,388.0 |  | $ 2,200.0
Customers |  |  |  |
Movement in Valuation and Qualifying Accounts |  |  |  |
Balance at Beginning of Period | 46.2 | 48.9 | 52.2 |
Charged to Costs and Expenses | 17.7 | 23.9 | 24.1 |
Charged to Other Accounts | 0.0 | 0.0 | 0.0 |
Deductions | 22.7 | 26.6 | 27.4 |
Balance at End of Period | 41.2 | 46.2 | 48.9 |
All others |  |  |  |
Movement in Valuation and Qualifying Accounts |  |  |  |
Balance at Beginning of Period | 15.5 | 23.3 | 17.8 |
Charged to Costs and Expenses | 15.9 | 18.0 | 19.7 |
Charged to Other Accounts | 0.0 | 0.0 | 0.0 |
Deductions | 10.8 | 25.8 | 14.2 |
Balance at End of Period | 20.6 | 15.5 | 23.3 |
Tax valuation allowance |  |  |  |
Movement in Valuation and Qualifying Accounts |  |  |  |
Balance at Beginning of Period | 32.0 | 29.0 | 1,380.0 |
Charged to Costs and Expenses | 0.0 | 3.0 | 0.0 |
Charged to Other Accounts | 0.0 | 0.0 | 0.0 |
Deductions | 8.0 | 0.0 | 1,351.0 |
Balance at End of Period | 24.0 | 32.0 | 29.0 |
Edison Mission Energy |  |  |  |
Movement in Valuation and Qualifying Accounts |  |  |  |
Deferred tax assets, loss and credit carryforwards |  |  |  | 1,600.0
Deferred income tax benefits, net |  |  |  | $ 220.0
Southern California Edison Company |  |  |  |
Movement in Valuation and Qualifying Accounts |  |  |  |
Balance at Beginning of Period | 61.7 | 67.6 | 65.5 |
Charged to Costs and Expenses | 32.9 | 41.9 | 43.7 |
Charged to Other Accounts | 0.0 | 0.0 | 0.0 |
Deductions | 33.5 | 47.8 | 41.6 |
Balance at End of Period | 61.1 | 61.7 | 67.6 |
Deferred tax assets, loss and credit carryforwards | 0.0 | 0.0 |  |
Southern California Edison Company | Customers |  |  |  |
Movement in Valuation and Qualifying Accounts |  |  |  |
Balance at Beginning of Period | 46.2 | 48.9 | 52.2 |
Charged to Costs and Expenses | 17.0 | 23.9 | 24.1 |
Charged to Other Accounts | 0.0 | 0.0 | 0.0 |
Deductions | 22.7 | 26.6 | 27.4 |
Balance at End of Period | 40.5 | 46.2 | 48.9 |
Southern California Edison Company | All others |  |  |  |
Movement in Valuation and Qualifying Accounts |  |  |  |
Balance at Beginning of Period | 15.5 | 18.7 | 13.3 |
Charged to Costs and Expenses | 15.9 | 18.0 | 19.6 |
Charged to Other Accounts | 0.0 | 0.0 | 0.0 |
Deductions | 10.8 | 21.2 | 14.2 |
Balance at End of Period | $ 20.6 | $ 15.5 | $ 18.7 |

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