Commitments and Contingencies (Power Purchase Agreement - Operating and Capital Leases) (Details) (Southern California Edison, USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Operating Leases
Operating Leases
2014	$ 1,273
2015	1,345
2016	1,271
2017	1,379
2018	1,272
Thereafter	17,616
Total future commitments	24,156
Capital Leases
Capital Leases
2014	33
2015	33
2016	33
2017	33
2018	33
Thereafter	356
Total future commitments	521
Amount representing executory costs	(118)
Amount representing interest	(194)
Net commitments	$ 209