CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS (USD $) In Millions	6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 766	[1]	$ 305	[1]
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	479		425
Deferred income taxes and investment tax credits	147		96
Remeasurement of equity method investments	(277)
Equity earnings	(47)		(53)
Fixed-price contracts and other derivatives	(2)		14
Other adjustments to reconcile net income to net cash provided by operating activities	(23)		(6)
Net change in other working capital components	53		294
Distributions from RBS Sempra Commodities LLP, operating activities	53		198
Changes in other assets	2		53
Changes in other liabilities	(12)		(19)
Net cash provided by operating activities	1,139		1,307
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(1,225)		(839)
Expenditures for investments	(682)		(370)
Distributions from RBS Sempra Commodities LLP, investing activities	276
Distributions from investments	29		36
Purchases of nuclear decommissioning and other trust assets	(97)		(159)
Proceeds from sales by nuclear decommissioning and other trusts	94		159
Decrease in restricted cash	388		45
Increase in restricted cash	(420)		(40)
Other cash flows from investing activities	(16)		1
Net cash used in investing activities	(1,653)		(1,167)
CASH FLOWS FROM FINANCING ACTIVITIES
Common dividends paid	(210)		(172)
Preferred dividends paid by subsidiaries	(5)		(5)
Issuances of common stock	20		22
Repurchases of common stock	(18)		(2)
Redemption of subsidiary preferred stock	(80)
Issuances of debt (maturities greater than 90 days)	870		270
Payments on debt (maturities greater than 90 days)	(270)		(710)
Increase (decrease) in short-term debt, net	(319)		534
Other cash flows from financing activities	10		1
Net cash provided by (used in) financing activities	(2)		(62)
Effect of exchange rate changes on cash and cash equivalents	(4)
Increase (decrease) in cash and cash equivalents	(520)		78
Cash and cash equivalents, beginning of period	912	[2]	110
Cash and cash equivalents, end of period	392		188
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized	211		212
Income tax payments, net of refunds	75		5
Acquisition Of Business [Abstract]
Assets acquired	2,815		303
Cash paid, net of cash acquired	(611)		(285)
Fair of equity method investments immediately prior to the acquisition	(882)
Fair value of noncontrolling interests	(279)
Additional consideration accrued	(32)		(7)
Liabilities assumed	1,011		11
Increase in capital lease obligations for investments in property, plant and equipment			183
Accrued capital expenditures	273		290
Dividends declared but not paid	119		99
San Diego Gas and Electric Company and Subsidiary [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	147		131
Adjustments to reconcile net income to net cash provided by operating activities:
Utility depreciation and amortization	208		187
Deferred income taxes and investment tax credits	167		23
Fixed-price contracts and other derivatives	(6)		28
Other adjustments to reconcile net income to net cash provided by operating activities	(20)		(14)
Net change in other working capital components	52		(133)
Changes in other assets	15		9
Changes in other liabilities	(7)		(10)
Net cash provided by operating activities	556		221
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(714)		(522)
Purchases of nuclear decommissioning and other trust assets	(95)		(155)
Proceeds from sales by nuclear decommissioning and other trusts	90		150
Increase (decrease) in loans to affiliates, net			14
Decrease in restricted cash	257		45
Increase in restricted cash	(329)		(40)
Other cash flows from investing activities			(1)
Net cash used in investing activities	(791)		(509)
CASH FLOWS FROM FINANCING ACTIVITIES
Capital contribution	200
Preferred dividends paid	(2)		(2)
Issuances of long-term debt			250
Payments on long-term debt	(5)		(5)
Increase (decrease) in short-term debt, net			63
Other cash flows from financing activities			(3)
Net cash provided by (used in) financing activities	193		303
Increase (decrease) in cash and cash equivalents	(42)		15
Cash and cash equivalents, beginning of period	127	[2]	13
Cash and cash equivalents, end of period	85		28
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized	64		58
Income tax payments, net of refunds	29		49
Acquisition Of Business [Abstract]
Increase in capital lease obligations for investments in property, plant and equipment			183
Accrued capital expenditures	131		109
Dividends declared but not paid	1		1
Southern California Gas Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	128		135
Adjustments to reconcile net income to net cash provided by operating activities:
Utility depreciation and amortization	163		152
Deferred income taxes and investment tax credits	62		13
Other adjustments to reconcile net income to net cash provided by operating activities	(3)		(2)
Net change in other working capital components	74		325
Changes in other assets	16		4
Changes in other liabilities	(4)		(6)
Net cash provided by operating activities	436		621
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(325)		(216)
Increase (decrease) in loans to affiliates, net	(211)		(252)
Net cash used in investing activities	(536)		(468)
CASH FLOWS FROM FINANCING ACTIVITIES
Common dividends paid	(50)		(100)
Preferred dividends paid	(1)		(1)
Payments on long-term debt	(250)
Net cash provided by (used in) financing activities	(301)		(101)
Increase (decrease) in cash and cash equivalents	(401)		52
Cash and cash equivalents, beginning of period	417	[2]	49
Cash and cash equivalents, end of period	16		101
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized	34		29
Income tax payments, net of refunds	6		44
Acquisition Of Business [Abstract]
Accrued capital expenditures	$ 78		$ 61

[1] Before preferred dividends of subsidiaries.

[2] Derived from audited financial statements.