RECENT INVESTMENT ACTIVITY (Tables)

12 Months Ended

Dec. 31, 2011

Proforma Revenue (Tables) [Abstract]

Schedule of Proforma Revenue [Text Block]

		Years ended December 31,
(Dollars in millions)		2011		2010
Revenues		$	10,379	$	10,277
Earnings(1)			1,105		1,092
(1)	Pro forma earnings for 2010 include the $277 million gain related to the remeasurement of equity method investments, and accordingly, pro forma earnings for 2011 exclude the gain.

Purchase Price Allocation (Tables) [Abstract]

Schedule of Purchase Price Allocation [Text Block]

PURCHASE PRICE ALLOCATION
(Dollars in millions)
			At April 6, 2011
								Other
				Chilean		Peruvian		holding		Preliminary		Adjust-		Adjusted
				entities		entities		companies		Allocation		ments		Allocation
Fair value of businesses acquired:
	Cash consideration (fair value of total
	consideration)		$	495	$	385	$	8	$	888	$	―	$	888
	Fair value of equity method
	investments immediately prior to
	the acquisition			495		385		2		882		―		882
	Fair value of noncontrolling interests			37		242		―		279		―		279
Total fair value of businesses acquired				1,027		1,012		10		2,049		―		2,049
Recognized amounts of identifiable assets
	acquired and liabilities assumed:
		Cash		219		22		4		245		―		245
		Accounts receivable(1)		159		101		6		266		(2)		264
		Other current assets		20		19		―		39		2		41
		Property, plant and equipment		554		931		―		1,485		1		1,486
		Other noncurrent assets		66		―		―		66		1		67
		Accounts payable		(79)		(59)		―		(138)		6		(132)
		Short-term debt and current portion
		of long-term debt		―		(47)		―		(47)		―		(47)
		Other current liabilities		(29)		(56)		―		(85)		(4)		(89)
		Long-term debt		(294)		(179)		―		(473)		(11)		(484)
		Other noncurrent liabilities		(90)		(178)		―		(268)		(9)		(277)
Total identifiable net assets				526		554		10		1,090		(16)		1,074
Goodwill			$	501	$	458	$	―	$	959	$	16	$	975
Acquisition-related costs (included in Other
	Operation and Maintenance expense on
	the Consolidated Statement of
	Operations for the year ended
	December 31, 2011)		$	1	$	1	$	―	$	2	$	―	$	2
(1)		We expect acquired accounts receivable to be substantially realizable in cash. Accounts receivable are net of collection allowances of $6 million for Chile and $1 million for Peru.

Recent Investment Activity (Tables) [Abstract]

Schedule of Business Acquisitions, by Acquisition

(Dollars in millions)			At April 30, 2010
Cash consideration (fair value of total consideration)			$	307
Recognized amounts of identifiable assets acquired and liabilities assumed:
	Cash			15
	Accounts receivable			4
	Investment in equity method investee			256
	Property, plant & equipment			25
	Other liabilities			(11)
Total identifiable net assets				289
Goodwill(1)			$	18
Acquisition-related costs (included in Other Operation and Maintenance expense
	on the Consolidated Statement of Operations for the year ended
	December 31, 2010)		$	1
(1)		The goodwill, which represents the residual of the consideration paid over the identifiable net assets, is assigned to the Sempra Pipelines & Storage segment and is attributed to the strategic value of the transaction. None of the goodwill recorded is deductible in Mexico for income tax purposes.