CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 530	$ 252	[1],[2]
Restricted cash	42	24	[1],[2]
Other accounts and notes receivable	152	147	[1],[2]
Trade accounts receivable	922	1,198	[1],[2]
Inventories	398	346	[1],[2]
Income taxes receivable	18
Regulatory balancing accounts, undercollected	301	38	[1],[2]
Regulatory assets	88	89	[1],[2]
Fixed-price contracts and other derivatives, current assets	74	85	[1],[2]
Settlement receivable related to wildfire litigation	180	10	[1],[2]
U.S. Treasury grants receivable	181
Other current assets	192	143	[1],[2]
Total current assets	3,078	2,332	[1],[2]
Investments And Other Assets [Abstract]
Restricted cash, noncurrent	20	22	[1],[2]
Regulatory assets arising from pension and other postretirement benefit obligations	1,027	1,126	[1],[2]
Regulatory assets arising from wildfire litigation costs	326	594	[1],[2]
Other regulatory assets	1,155	1,060	[1],[2]
Nuclear decommissioning trusts	892	804	[1],[2]
Other investments	1,585	1,671	[1],[2]
Goodwill	1,109	1,036	[1],[2]
Other intangible assets	441	448	[1],[2]
Sundry	767	691	[1],[2]
Total investments and other assets	7,322	7,452	[1],[2]
Property, plant and equipment:
Property, plant and equipment	33,251	31,192	[1],[2]
Less accumulated depreciation and amortization	(8,261)	(7,727)	[1],[2]
Property, plant and equipment, net	24,990	23,465	[1],[2]
Total assets	35,390	33,249	[1],[2]
Current liabilities:
Short-term debt	584	449	[1],[2]
Accounts payable - trade	970	983	[1],[2]
Accounts payable - other	126	124	[1],[2]
Income taxes payable		5	[1],[2]
Deferred income taxes, net current liabilities	155	173	[1],[2]
Dividends and interest payable	309	219	[1],[2]
Accrued compensation and benefits	273	323	[1],[2]
Regulatory balancing accounts, overcollected	117	105	[1],[2]
Current portion of long-term debt	709	336	[1],[2]
Fixed-price contracts and other derivatives, current liabilities	82	92	[1],[2]
Customer deposits	150	142	[1],[2]
Reserve for wildfire litigation (Note 10)	284	586	[1],[2]
Other current liabilities	590	615	[1],[2]
Total current liabilities	4,349	4,152	[1],[2]
Long-term debt	11,193	10,078	[1],[2]
Deferred Credits And Other Liabilities [Abstract]
Customer advances for construction	146	142	[1],[2]
Pension and other postretirement benefit obligations, net of plan assets	1,337	1,423	[1],[2]
Deferred income taxes, net noncurrent liabilities	1,609	1,520	[1],[2]
Deferred investment tax credits	47	49	[1],[2]
Regulatory liabilities arising from removal obligations	2,673	2,551	[1],[2]
Asset retirement obligations	1,981	1,905	[1],[2]
Other regulatory liabilities	55	87	[1],[2]
Noncurrent reserve for wildfire litigation (Note 10)	127	10	[1],[2]
Fixed-price contracts and other derivatives, noncurrent liabilities	270	301	[1],[2]
Deferred credits and other	1,028	774	[1],[2]
Total deferred credits and other liabilities	9,273	8,762	[1],[2]
Contingently redeemable preferred stock of subsidiary	79	79	[1],[2]
Equity:
Common stock	2,178	2,104	[1],[2]
Retained earnings	8,293	8,162	[1],[2]
Deferred compensation		(2)	[1],[2]
Accumulated other comprehensive income (loss)	(389)	(489)	[1],[2]
Total shareholders' equity	10,082	9,775	[1],[2]
Preferred stock of subsidiaries	20	20	[1],[2]
Other noncontrolling interests	394	383	[1],[2]
Total equity	10,496	10,178	[1],[2]
Total liabilities and equity	35,390	33,249	[1],[2]
San Diego Gas and Electric Company and Subsidiary [Member]
Current assets:
Cash and cash equivalents	22	29	[2]
Restricted cash	11	21	[2]
Other accounts and notes receivable	20	23	[2]
Trade accounts receivable	294	267	[2]
Inventories	83	82	[2]
Due from unconsolidated affiliates	17	67	[2]
Income taxes receivable	171	102	[2]
Regulatory balancing accounts, net	301	38	[2]
Regulatory assets arising from fixed-price contracts and other derivatives - current	63	67	[2]
Regulatory assets	11	11	[2]
Fixed-price contracts and other derivatives, current assets	25	27	[2]
Settlement receivable related to wildfire litigation	180	10	[2]
Other current assets	109	51	[2]
Total current assets	1,307	795	[2]
Investments And Other Assets [Abstract]
Restricted cash, noncurrent	20	22	[2]
Deferred taxes recoverable in rates	647	570	[2]
Regulatory assets arising from fixed-price contracts and other derivatives - noncurrent	138	191	[2]
Regulatory assets arising from pension and other postretirement benefit obligations	287	309	[2]
Regulatory assets arising from wildfire litigation costs	326	594	[2]
Other regulatory assets	252	160	[2]
Nuclear decommissioning trusts	892	804	[2]
Sundry	89	70	[2]
Total investments and other assets	2,651	2,720	[2]
Property, plant and equipment:
Property, plant and equipment	13,827	13,003	[2]
Less accumulated depreciation and amortization	(3,196)	(2,963)	[2]
Property, plant and equipment, net	10,631	10,040	[2]
Total assets	14,589	13,555	[2]
Current liabilities:
Short-term debt	2
Accounts payable - trade	304	375	[2]
Due to unconsolidated affiliates	20	14	[2]
Deferred income taxes, net current liabilities	54	62	[2]
Dividends and interest payable	55	32	[2]
Accrued compensation and benefits	93	124	[2]
Current portion of long-term debt	19	19	[2]
Fixed-price contracts and other derivatives, current liabilities	54	55	[2]
Customer deposits	63	62	[2]
Reserve for wildfire litigation (Note 10)	284	586	[2]
Other current liabilities	117	107	[2]
Total current liabilities	1,065	1,436	[2]
Long-term debt	4,293	4,058	[2]
Deferred Credits And Other Liabilities [Abstract]
Customer advances for construction	18	20	[2]
Pension and other postretirement benefit obligations, net of plan assets	323	342	[2]
Deferred income taxes, net noncurrent liabilities	1,515	1,167	[2]
Deferred investment tax credits	26	26	[2]
Regulatory liabilities arising from removal obligations	1,575	1,462	[2]
Asset retirement obligations	724	693	[2]
Noncurrent reserve for wildfire litigation (Note 10)	127	10	[2]
Fixed-price contracts and other derivatives, noncurrent liabilities	220	243	[2]
Deferred credits and other	421	178	[2]
Total deferred credits and other liabilities	4,949	4,141	[2]
Contingently redeemable preferred stock	79	79	[2]
Equity:
Common stock	1,338	1,338	[2]
Retained earnings	2,785	2,411	[2]
Accumulated other comprehensive income (loss)	(10)	(10)	[2]
Total shareholders' equity	4,113	3,739	[2]
Other noncontrolling interests	90	102	[2]
Total equity	4,203	3,841	[2]
Total liabilities and equity	14,589	13,555	[2]
Southern California Gas Company [Member]
Current assets:
Cash and cash equivalents	257	36	[2]
Other accounts and notes receivable	72	63	[2]
Trade accounts receivable	273	578	[2]
Inventories	166	151	[2]
Due from unconsolidated affiliates	280	40	[2]
Income taxes receivable	19	17	[2]
Regulatory assets	6	9	[2]
Other current assets	32	28	[2]
Total current assets	1,105	922	[2]
Investments And Other Assets [Abstract]
Regulatory assets arising from pension and other postretirement benefit obligations	730	808	[2]
Other regulatory assets	117	137	[2]
Sundry	11	8	[2]
Total investments and other assets	858	953	[2]
Property, plant and equipment:
Property, plant and equipment	10,919	10,565	[2]
Less accumulated depreciation and amortization	(4,098)	(3,965)	[2]
Property, plant and equipment, net	6,821	6,600	[2]
Total assets	8,784	8,475	[2]
Current liabilities:
Accounts payable - trade	254	315	[2]
Accounts payable - other	78	78	[2]
Due to unconsolidated affiliates	16	2	[2]
Deferred income taxes, net current liabilities	42	44	[2]
Accrued compensation and benefits	102	99	[2]
Regulatory balancing accounts, net credit	117	105	[2]
Current portion of long-term debt	254	257	[2]
Customer deposits	76	75	[2]
Other current liabilities	129	172	[2]
Total current liabilities	1,068	1,147	[2]
Long-term debt	1,409	1,064	[2]
Deferred Credits And Other Liabilities [Abstract]
Customer advances for construction	113	110	[2]
Pension and other postretirement benefit obligations, net of plan assets	756	833	[2]
Deferred income taxes, net noncurrent liabilities	652	576	[2]
Deferred investment tax credits	21	23	[2]
Regulatory liabilities arising from removal obligations	1,084	1,075	[2]
Asset retirement obligations	1,197	1,161	[2]
Deferred taxes refundable in rates	55	87	[2]
Deferred credits and other	195	206	[2]
Total deferred credits and other liabilities	4,073	4,071	[2]
Equity:
Preferred stock	22	22	[2]
Common stock	866	866	[2]
Retained earnings	1,366	1,326	[2]
Accumulated other comprehensive income (loss)	(20)	(21)	[2]
Total shareholders' equity	2,234	2,193	[2]
Total equity	2,234	2,193
Total liabilities and equity	$ 8,784	$ 8,475	[2]

[1] As adjusted for the retrospective effect of a change in accounting principle as we discuss in Note 1.

[2] Derived from audited financial statements.