Segments Of Business

6 Months Ended

Jun. 30, 2012

Segments Of Business [Abstract]

Segments Of Business

21.       Business Segment Information

Operating segments are components of an enterprise for which separate financial information is available and evaluated regularly by the chief operating decision maker in deciding how to allocate resources and assess performance. The NiSource Chief Executive Officer is the chief operating decision maker.

At June 30, 2012, NiSource's operations are divided into three primary business segments. The Gas Distribution Operations segment provides natural gas service and transportation for residential, commercial and industrial customers in Ohio, Pennsylvania, Virginia, Kentucky, Maryland, Indiana and Massachusetts. The Gas Transmission and Storage Operations segment offers gas transportation and storage services for LDCs, marketers and industrial and commercial customers located in northeastern, mid-Atlantic, midwestern and southern states. The Electric Operations segment provides electric service in 20 counties in the northern part of Indiana.

The following table provides information about business segments. NiSource uses operating income as its primary measurement for each of the reported segments and makes decisions on finance, dividends and taxes at the corporate level on a consolidated basis. Segment revenues include intersegment sales to affiliated subsidiaries, which are eliminated in consolidation. Affiliated sales are recognized on the basis of prevailing market, regulated prices or at levels provided for under contractual agreements. Operating income is derived from revenues and expenses directly associated with each segment.

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in millions)	2012		2011		2012		2011
REVENUES
Gas Distribution Operations
Unaffiliated (1)	$	452.2	$	629.7	$	1,521.3	$	2,214.5
Intersegment		0.1		0.2		0.3		0.9
Total		452.3		629.9		1,521.6		2,215.4
Gas Transmission and Storage Operations
Unaffiliated		209.5		200.5		442.5		413.9
Intersegment		31.5		33.0		73.9		75.0
Total		241.0		233.5		516.4		488.9
Electric Operations
Unaffiliated		378.7		350.8		733.1		699.0
Intersegment		0.2		0.2		0.4		0.4
Total		378.9		351.0		733.5		699.4
Corporate and Other
Unaffiliated (2)		8.3		47.3		10.5		132.5
Intersegment		115.3		122.2		226.0		232.7
Total		123.6		169.5		236.5		365.2
Eliminations		(147.1)		(155.6)		(300.6)		(309.0)
Consolidated Revenues	$	1,048.7	$	1,228.3	$	2,707.4	$	3,459.9
Operating Income (Loss)
Gas Distribution Operations	$	46.9	$	46.6	$	258.9	$	288.1
Gas Transmission and Storage Operations		91.5		84.6		230.1		203.0
Electric Operations		70.4		40.3		116.6		90.9
Corporate and Other		(0.2)		(6.0)		2.4		(10.1)
Consolidated Operating Income	$	208.6	$	165.5	$	608.0	$	571.9
(1)With the implementation of the standard choice offer, Columbia of Ohio reported lower gross revenues and cost of sales beginning April 1, 2012. There was no impact on net revenues.
(2)The reduction to other revenues is attributed to the continued wind down of the unregulated natural gas marketing business as well as the early termination of certain contracts as discussed in Note 9, "Risk Management Activities." There was a corresponding decrease in cost of sales with no impact to operating income.