RECENT INVESTMENT ACTIVITY (Tables)

12 Months Ended

Dec. 31, 2012

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)			1,079		1,062
(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
				entities		entities		companies		Total
Fair value of businesses acquired:
	Cash consideration (fair value of total
	consideration)		$	495	$	385	$	8	$	888
	Fair value of equity method
	investments immediately prior to
	the acquisition			495		385		2		882
	Fair value of noncontrolling interests			37		242		―		279
Total fair value of businesses acquired				1,027		1,012		10		2,049
Recognized amounts of identifiable assets
	acquired and liabilities assumed:
		Cash		219		22		4		245
		Property, plant and equipment		555		931		―		1,486
		Long-term debt		(305)		(179)		―		(484)
		Other net assets (liabilities) acquired		44		(223)		6		(173)
Total identifiable net assets				513		551		10		1,074
Goodwill			$	514	$	461	$	―	$	975

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:
	Investment in equity method investee			256
	Other net assets acquired			33
Total identifiable net assets				289
Goodwill(1)			$	18
(1)		The goodwill, which represents the residual of the consideration paid over the identifiable net assets, is assigned to the Sempra Mexico segment and is attributed to the strategic value of the transaction. None of the goodwill recorded is deductible in Mexico for income tax purposes.