CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS	9 Months Ended
	Sep. 30, 2014 USD ($)		Sep. 30, 2013 USD ($)	Sep. 30, 2014 San Diego Gas and Electric Company and Subsidiary [Member] USD ($)		Sep. 30, 2013 San Diego Gas and Electric Company and Subsidiary [Member] USD ($)	Sep. 30, 2014 Southern California Gas Company [Member] USD ($)		Sep. 30, 2013 Southern California Gas Company [Member] USD ($)
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 941,000,000		$ 768,000,000	$ 399,000,000		$ 293,000,000	$ 257,000,000		$ 267,000,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	866,000,000		828,000,000
Utility depreciation and amortization				395,000,000		367,000,000	321,000,000		280,000,000
Deferred income taxes and investment tax credits	131,000,000		327,000,000	193,000,000		100,000,000	94,000,000		72,000,000
Gain on sale of equity interest and assets	(48,000,000)		(113,000,000)
Plant closure (adjustment) loss	(13,000,000)		200,000,000
Utility plant closure (adjustment) loss				(13,000,000)		200,000,000
Equity earnings	(84,000,000)		(34,000,000)
Fixed-price contracts and other derivatives	(19,000,000)		(25,000,000)	(5,000,000)		(7,000,000)
Other	32,000,000		23,000,000	(30,000,000)		(9,000,000)	(2,000,000)		(6,000,000)
Net change in other working capital components	(215,000,000)		(454,000,000)	(252,000,000)		(284,000,000)	(19,000,000)		(56,000,000)
Changes in other assets	28,000,000		(203,000,000)	106,000,000		(164,000,000)	(70,000,000)		(65,000,000)
Changes in other liabilities	42,000,000		13,000,000	28,000,000		13,000,000	15,000,000		(5,000,000)
Net cash provided by operating activities	1,661,000,000		1,330,000,000	821,000,000		509,000,000	596,000,000		487,000,000
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(2,320,000,000)		(1,785,000,000)	(790,000,000)		(679,000,000)	(764,000,000)		(521,000,000)
Expenditures for investments	(192,000,000)		(21,000,000)
Proceeds from sale of equity interest and assets, net of cash sold	92,000,000		566,000,000
Proceeds from U.S. Treasury grants	0		238,000,000
Distributions from investments	15,000,000		141,000,000
Purchases of nuclear decommissioning and other trust assets	(505,000,000)		(514,000,000)	(501,000,000)		(511,000,000)
Proceeds from sales by nuclear decommissioning and other trusts	498,000,000		510,000,000	498,000,000		507,000,000
Decrease in restricted cash	156,000,000		285,000,000	109,000,000		54,000,000
Increase in restricted cash	(139,000,000)		(311,000,000)	(96,000,000)		(52,000,000)
Decrease (increase) in loans to affiliates, net	(81,000,000)		0				(281,000,000)		17,000,000
Other cash flows from investing activities	10,000,000		(10,000,000)	(16,000,000)		3,000,000
Net cash used in investing activities	(2,466,000,000)		(901,000,000)	(796,000,000)		(678,000,000)	(1,045,000,000)		(504,000,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Common dividends paid	(450,000,000)		(452,000,000)				0		(50,000,000)
Preferred dividends paid				0		(4,000,000)	(1,000,000)		(1,000,000)
Preferred dividends paid by subsidiaries	(1,000,000)		(5,000,000)
Proceeds from issuances of common stock	43,000,000		57,000,000
Repurchases of common stock	(38,000,000)		(45,000,000)
Issuances of long-term debt	3,063,000,000		1,404,000,000	100,000,000		450,000,000	747,000,000		0
Payments on long-term debt	(1,845,000,000)		(1,444,000,000)	(22,000,000)		(183,000,000)	(250,000,000)		0
Proceeds from sale of noncontrolling interests, net of $25 million in offering costs	0		574,000,000
Increase (decrease) in short-term debt, net	(111,000,000)		81,000,000	(59,000,000)		0	(42,000,000)		0
Distributions to noncontrolling interests	(84,000,000)		(28,000,000)	(38,000,000)		(12,000,000)
Other cash flows from financing activities	(5,000,000)		15,000,000	0		(2,000,000)	(7,000,000)		0
Net cash provided by (used in) financing activities	572,000,000		157,000,000	(19,000,000)		249,000,000	447,000,000		(51,000,000)
Effect of exchange rate changes on cash and cash equivalents	(4,000,000)		0
Increase (decrease) in cash and cash equivalents	(237,000,000)		586,000,000	6,000,000		80,000,000	(2,000,000)		(68,000,000)
Cash and cash equivalents, beginning of period	904,000,000	[1]	475,000,000	27,000,000	[1]	87,000,000	27,000,000	[1]	83,000,000
Cash and cash equivalents, end of period	667,000,000		1,061,000,000	33,000,000		167,000,000	25,000,000		15,000,000
Sale of noncontrolling interests offering costs			25,000,000
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized	359,000,000		359,000,000	136,000,000		127,000,000	43,000,000		44,000,000
Income tax payments, net of refunds	154,000,000		106,000,000	(4,000,000)		33,000,000	19,000,000		66,000,000
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Nuclear facility plant reclassified to regulatory asset, net of depreciation and amortization	0		512,000,000	0		512,000,000
Accrued capital expenditures	385,000,000		285,000,000	118,000,000		108,000,000	137,000,000		97,000,000
Increase in capital lease obligations for investments in property, plant and equipment	60,000,000		0	60,000,000		0
Capital expenditures recoverable by U. S. Treasury grants receivable	0		3,000,000
Sequestration of U.S. Treasury grants receivable	0		(23,000,000)
Acquisition Of Business [Abstract]
Assets acquired	0		13,000,000
Cash paid, net of cash acquired	0		(11,000,000)
Liabilities Assumed	0		2,000,000
Call premium on preferred stock of subsidiary	0		3,000,000
Call premium on preferred stock				0		3,000,000
Dividends declared but not paid	166,000,000		158,000,000	0		1,000,000
Financing of build-to-suit property	$ 49,000,000		$ 0

[1] Derived from audited financial statements.