Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Operating Revenues
Electric Retail Sales	$ 363,385	$ 360,028	$ 856,216	$ 824,714
Electric Wholesale Sales Revenue	41,847	36,838	121,506	102,397
California Power Exchange (CPX) Provision for Wholesale Refunds				(2,970)
Gas Revenue	16,831	16,140	99,041	96,598
Other Revenues	28,884	25,824	88,624	76,053
Total Operating Revenues	450,947	438,830	1,165,387	1,096,792
Operating Expenses
Fuel	98,962	89,874	252,103	219,192
Purchased Energy	88,734	93,889	233,344	243,285
Transmission	(1,354)	3,380	4,612	8,688
Decrease to Reflect PPFAC/PGA Recovery Treatment	(3,576)	(11,735)	(5,174)	(34,260)
Increase (Decrease) to Reflect PPFAC/PGA Recovery Treatment			(5,000)
Total Fuel and Purchased Energy	182,766	175,408	484,885	436,905
Other Operations and Maintenance	90,781	88,936	281,888	258,979
Depreciation	33,553	32,450	99,653	95,773
Amortization	7,882	7,177	22,513	20,797
Taxes Other Than Income Taxes	12,205	11,334	36,579	35,559
Total Operating Expenses	327,187	315,305	925,518	848,013
Operating Income	123,760	123,525	239,869	248,779
Other Income (Deductions)
Interest Income	1,919	2,011	3,739	5,891
Other Income	1,678	2,196	7,155	9,334
Other Expense	(1,412)	(2,456)	(2,830)	(9,359)
Total Other Income (Deductions)	2,185	1,751	8,064	5,866
Interest Expense
Long-Term Debt	17,945	15,928	54,240	46,984
Capital Leases	10,248	11,616	30,108	35,124
Other Interest Expense, Net of Interest Capitalized	(88)	(1,726)	(1,118)	(1,213)
Interest Expense	28,105	25,818	83,230	80,895
Income Before Income Taxes	97,840	99,458	164,703	173,750
Income Tax Expense	38,128	43,793	62,916	72,018
Net Income	59,712	55,665	101,787	101,732
Weighted-Average Shares of Common Stock Outstanding (000)
Basic	37,053	36,533	36,930	36,321
Diluted	41,777	41,141	41,577	40,923
Basic Earnings Per Share	$ 1.61	$ 1.52	$ 2.76	$ 2.80
Diluted Earnings per Share	$ 1.46	$ 1.38	$ 2.53	$ 2.56
Dividends Declared per Share	$ 0.42	$ 0.39	$ 1.26	$ 1.17
TEP [Member]
Operating Revenues
Electric Retail Sales	308,924	300,348	714,278	685,322
Electric Wholesale Sales Revenue	29,608	26,731	96,623	96,997
California Power Exchange (CPX) Provision for Wholesale Refunds				(2,970)
Other Revenues	31,313	27,559	93,765	81,066
Total Operating Revenues	369,845	354,638	904,666	860,415
Operating Expenses
Fuel	95,977	85,174	246,563	209,843
Purchased Power	40,509	47,909	84,189	105,900
Transmission	(4,266)	972	(2,339)	2,818
Increase (Decrease) to Reflect PPFAC/PGA Recovery Treatment	1,115	(12,724)	(5,146)	(23,023)
Total Fuel and Purchased Energy	133,335	121,331	323,267	295,538
Other Operations and Maintenance	79,837	74,687	246,423	219,664
Depreciation	26,541	25,190	78,124	74,143
Amortization	8,798	8,153	25,282	23,963
Taxes Other Than Income Taxes	9,855	9,222	29,803	28,903
Total Operating Expenses	258,366	238,583	702,899	642,211
Operating Income	111,479	116,055	201,767	218,204
Other Income (Deductions)
Interest Income	1,666	1,725	2,983	5,111
Other Income	229	2,018	4,597	4,351
Other Expense	(2,754)	(2,468)	(7,751)	(7,352)
Total Other Income (Deductions)	(859)	1,275	(171)	2,110
Interest Expense
Long-Term Debt	12,081	10,223	36,493	30,255
Capital Leases	10,248	11,614	30,107	35,118
Other Interest Expense, Net of Interest Capitalized	(44)	(1,683)	(881)	(1,641)
Interest Expense	22,285	20,154	65,719	63,732
Income Before Income Taxes	88,335	97,176	135,877	156,582
Income Tax Expense	34,423	37,472	52,104	58,447
Net Income	$ 53,912	$ 59,704	$ 83,773	$ 98,135