Supplemental Cash Flows Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash payments for interest and taxes:
Interest, net of amounts capitalized	$ 230	$ 226
Tax payments (refunds), net	3	189
Dividends declared but not paid:
Pollution-control bonds redeemed (2.875%)	(203)	0
Pollution-control bonds issued (1.875%)	203	0
Common stock
Dividends declared but not paid:
Dividends declared but not paid	136	116
Preferred and preference stock
Dividends declared but not paid:
Dividends declared but not paid	18	18
Southern California Edison
Cash payments for interest and taxes:
Interest, net of amounts capitalized	222	225
Tax payments (refunds), net	125	14
Dividends declared but not paid:
Pollution-control bonds redeemed (2.875%)	(203)	0
Pollution-control bonds issued (1.875%)	203	0
Accrued capital expenditures	393	451
Reduction in lease obligation	$ 147
Southern California Edison | 2.875% Pollution-Control Bonds
Dividends declared but not paid:
Debt interest rate	2.875%
Southern California Edison | 1.875% Pollution-Control Bonds Due in 2029
Dividends declared but not paid:
Debt Conversion, Converted Instrument, Rate	1.875%
Southern California Edison | Common stock
Dividends declared but not paid:
Dividends declared but not paid	$ 147	126
Southern California Edison | Preferred and preference stock
Dividends declared but not paid:
Dividends declared but not paid	$ 18	$ 18