Supplemental Cash Flows Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash payments for interest and taxes:
Interest, net of amounts capitalized	$ 434	$ 412
Tax payments (refunds), net	3	190
Dividends declared but not paid:
Pollution-control bonds redeemed (2.875%)	(203)	0
Pollution-control bonds issued (1.875%)	203	0
Notes issued under EME Settlement Agreement	0	410
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	0	4
Southern California Edison
Cash payments for interest and taxes:
Interest, net of amounts capitalized	409	411
Tax payments (refunds), net	125	15
Dividends declared but not paid:
Pollution-control bonds redeemed (2.875%)	(203)	0
Pollution-control bonds issued (1.875%)	203	0
Notes issued under EME Settlement Agreement	0	0
Accrued capital expenditures	403	505
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:
Converted debt interest 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	$ 0	$ 4