Supplemental Cash Flows Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash payments (receipts) for interest and taxes:
Interest, net of amounts capitalized	$ 504us-gaap_InterestPaidNet	$ 477us-gaap_InterestPaidNet	$ 452us-gaap_InterestPaidNet
Tax payments (refunds), net	32us-gaap_IncomeTaxesPaidNet	28us-gaap_IncomeTaxesPaidNet	(165)us-gaap_IncomeTaxesPaidNet
Dividends declared but not paid:
Common stock	136	116	110
Preferred and preference stock	18	30	24
Notes issued under EME Settlement Agreement	418us-gaap_NotesIssued1	0us-gaap_NotesIssued1	0us-gaap_NotesIssued1
Southern California Edison
Cash payments (receipts) for interest and taxes:
Interest, net of amounts capitalized	487	462	437
Tax payments (refunds), net	(88)	28	(279)
Dividends declared but not paid:
Common stock	147	0	0
Preferred and preference stock	18	30	24
Notes issued under EME Settlement Agreement	0	0	0
Accrued capital expenditures	$ 837	$ 661	$ 671

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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