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Derivative Instruments (Notional Values) (Details) - Southern California Edison - Electric Utility - Economic hedges | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2015 Bcfe GWh | Dec. 31, 2014 Bcfe GWh
Electricity options, swaps and forwards (GWh) |  |
Derivatives |  |
Notional volumes of derivative instruments | 5,323 | 3,618
Natural gas options, swaps and forwards (Bcf) |  |
Derivatives |  |
Notional volumes of derivative instruments | Bcfe | 88 | 83
Congestion revenue rights (GWh) |  |
Derivatives |  |
Notional volumes of derivative instruments | 96,541 | 122,859
Tolling arrangements (GWh) |  |
Derivatives |  |
Notional volumes of derivative instruments | 75,352 | 79,989

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