SEGMENT INFORMATION (Tables)

12 Months Ended

Dec. 31, 2012

Segment Reporting [Abstract]

Schedule of Segment Reporting Information

2012
														SPPC
		NVE		NVE		NPC		SPPC		SPPC		SPPC		Reconciling
		Consolidated		Other		Electric		Total		Electric		Gas		Eliminations(1)
Operating Revenues		$	2,979,177	$	16	$	2,145,241	$	833,920	$	725,874	$	108,046	$
Energy Costs:
	Fuel for power generation		565,381		-		407,687		157,694		157,694		-
	Purchased power		603,999		-		472,715		131,284		131,284		-
	Gas purchased for resale		74,352		-		-		74,352		-		74,352
	Deferred energy		(106,728)		-		(67,976)		(38,752)		(26,369)		(12,383)
Energy efficiency program costs			96,677		-		81,845		14,832		14,832		-
Total Costs			1,233,681		-		894,271		339,410		277,441		61,969
Gross Margin		$	1,745,496	$	16	$	1,250,970	$	494,510	$	448,433	$	46,077
Other operating expenses			412,372		4,960		267,720		139,692
Maintenance			109,725		-		74,364		35,361
Depreciation and amortization			377,640		-		269,721		107,919
Taxes other than income			60,696		438		36,870		23,388
Operating Income		$	785,063	$	(5,382)	$	602,295	$	188,150
Assets		$	11,984,136	$	26,718	$	8,641,145	$	3,316,273	$	2,919,362	$	318,901	$	78,010
Capital expenditures		$	498,893	$	-	$	287,598	$	211,295	$	190,702	$	20,593

2011
														SPPC
		NVE		NVE		NPC		SPPC		SPPC		SPPC		Reconciling
		Consolidated		Other		Electric		Total		Electric		Gas		Eliminations(1)
Operating Revenues		$	2,943,307	$	15	$	2,054,393	$	888,899	$	716,417	$	172,482	$
Energy Costs:
	Fuel for power generation		680,585		0		498,487		182,098		182,098		-
	Purchased power		633,874		0		477,226		156,648		156,648		-
	Gas purchased for resale		125,155		0				125,155				125,155
	Deferred energy		(83,333)		0		(16,300)		(67,033)		(65,445)		(1,588)
Energy efficiency program costs			43,537		0		37,292		6,245		6,245
Total Costs			1,399,818		0		996,705		403,113		279,546		123,567
Gross Margin		$	1,543,489	$	15	$	1,057,688	$	485,786	$	436,871	$	48,915
Other operating expense			411,115		4,289		260,127		146,699
Maintenance			103,307		-		64,320		38,987
Depreciation and amortization			357,937		-		252,191		105,746
Taxes other than income			60,465		290		37,254		22,921
Operating Income		$	610,665	$	(4,564)	$	443,796	$	171,433
Assets		$	11,667,129	$	8,523	$	8,442,597	$	3,216,009	$	2,844,718	$	308,272	$	63,019
Capital expenditures(2)		$	620,516	$	0	$	475,118	$	145,398	$	132,083	$	13,315

2010
														SPPC
		NVE		NVE		NPC		SPPC		SPPC		SPPC		Reconciling
		Consolidated		Other		Electric		Total		Electric		Gas		Eliminations(1)
Operating Revenues		$	3,280,222	$	23	$	2,252,377	$	1,027,822	$	836,879	$	190,943	$
Energy Costs:
	Fuel for power generation		821,484		0		588,419		233,065		233,065		-
	Purchased power		648,881		0		505,239		143,642		143,642		-
	Gas purchased for resale		137,702		0				137,702				137,702
	Deferred energy		113,107		0		94,843		18,264		8,475		9,789
Total Costs			1,721,174		0		1,188,501		532,673		385,182		147,491
Gross Margin		$	1,559,048	$	23	$	1,063,876	$	495,149	$	451,697	$	43,452
Other operating expenses			414,241		3,760		260,535		149,946
Maintenance			104,567		-		71,759		32,808
Depreciation and amortization			333,059		-		226,252		106,807
Taxes other than income			62,746		235		37,918		24,593
Operating Income		$	644,435	$	(3,972)	$	467,412	$	180,995
Assets		$	11,700,283	$	20,822	$	8,301,824	$	3,377,637	$	3,047,184	$	296,810	$	33,643
Capital expenditures(2)		$	629,496	$	(13,094)	$	499,374	$	143,216	$	131,579	$	11,637

(1) The reconciliation of segment assets at December 31, 2012, 2011, and 2010 to the consolidated total includes the following unallocated amounts:
		2012		2011		2010
	Other investments	$	6,499	$	5,901	$	5,956
	Cash		60,786		55,195		9,552
	Deferred charges-other		10,725		1,923		18,135
		$	78,010	$	63,019	$	33,643
(2) The capital expenditures for NVE Other at December 31, 2010 includes $13.1 million proceeds from the sale of assets between SPPC and SPCOM.