CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Revenues
Electric Retail Sales	$ 1,102,769	$ 1,087,279	$ 1,085,822
Electric Wholesale Sales	135,160	125,414	132,346
Gas Retail Sales	125,478	123,133	145,053
Other Revenue	121,153	125,940	115,481
Total Operating Revenues	1,484,560	1,461,766	1,478,702
Operating Expenses
Fuel	332,279	327,832	324,520
Purchased Energy	252,532	224,696	276,610
Transmission and Other PPFAC Recoverable Costs	23,012	14,540	7,334
Increase (Decrease) to Reflect PPFAC/PGA Recovery Treatment	(16,313)	32,246	(4,932)
Total Fuel and Purchased Energy	591,510	599,314	603,532
Operations and Maintenance	389,699	383,689	379,220
Depreciation	149,615	141,303	133,832
Amortization	27,557	35,784	30,983
Taxes Other Than Income Taxes	54,683	49,881	49,428
Total Operating Expenses	1,213,064	1,209,971	1,196,995
Operating Income	271,496	251,795	281,707
Other Income (Deductions)
Interest Income	534	1,106	4,568
Other Income	7,880	4,928	7,958
Other Expense	(3,463)	(7,723)	(5,278)
Appreciation in Fair Value of Investments	2,833	1,892	329
Total Other Income (Deductions)	7,784	203	7,577
Interest Expense [Abstract]
Long-Term Debt	71,180	71,909	73,217
Capital Leases	25,140	33,613	40,359
Other Interest Expense	538	1,983	2,535
Interest Capitalized	(3,483)	(2,153)	(3,753)
Interest Expense	93,375	105,352	112,358
Income Before Income Taxes	185,905	146,646	176,926
Income Tax Expense (Benefit)	58,427	55,727	66,951
Net Income	127,478	90,919	109,975
Weighted-Average Shares of Common Stock Outstanding (000)
Basic (in shares)	41,618	40,362	36,962
Diluted (in shares)	41,975	41,755	41,609
Earnings Per Share
Basic (in dollars per share)	$ 3.06	$ 2.25	$ 2.98
Diluted (in dollars per share)	$ 3.04	$ 2.20	$ 2.75
Dividends Declared Per Share (usd per share)	$ 1.74	$ 1.72	$ 1.68
TUCSON ELECTRIC POWER COMPANY
Operating Revenues
Electric Retail Sales	934,357	915,879	903,930
Electric Wholesale Sales	132,500	111,194	129,861
Other Revenue	129,833	134,587	122,595
Total Operating Revenues	1,196,690	1,161,660	1,156,386
Operating Expenses
Fuel	325,903	318,901	318,268
Purchased Energy	112,452	80,137	105,766
Transmission and Other PPFAC Recoverable Costs	12,233	5,722	(1,435)
Increase (Decrease) to Reflect PPFAC/PGA Recovery Treatment	(12,458)	31,113	(6,165)
Total Fuel and Purchased Energy	438,130	435,873	416,434
Operations and Maintenance	335,321	334,553	330,801
Depreciation	118,076	110,931	104,894
Amortization	31,294	39,493	34,650
Taxes Other Than Income Taxes	43,498	40,323	40,199
Total Operating Expenses	966,319	961,173	926,978
Operating Income	230,371	200,487	229,408
Other Income (Deductions)
Interest Income	120	136	3,567
Other Income	5,770	3,953	5,364
Other Expense	(10,715)	(13,574)	(12,064)
Appreciation in Fair Value of Investments	2,833	1,892	329
Total Other Income (Deductions)	(1,992)	(7,593)	(2,804)
Interest Expense [Abstract]
Long-Term Debt	56,378	55,038	49,858
Capital Leases	25,140	33,613	40,358
Other Interest Expense	87	1,446	1,127
Interest Capitalized	(2,554)	(1,782)	(2,073)
Interest Expense	79,051	88,315	89,270
Income Before Income Taxes	149,328	104,579	137,334
Income Tax Expense (Benefit)	47,986	39,109	52,000
Net Income	$ 101,342	$ 65,470	$ 85,334