CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Utility Plant
Plant in Service	$ 5,192,122	$ 5,005,768
Utility Plant Under Capital Leases	637,957	582,669
Construction Work in Progress	201,959	128,621
Total Utility Plant	6,032,038	5,717,058
Less Accumulated Depreciation and Amortization	(1,982,524)	(1,921,733)
Less Accumulated Amortization of Capital Lease Assets	(514,677)	(494,962)
Total Utility Plant—Net	3,534,837	3,300,363
Investments And Other Property
Investments in Lease Equity	36,194	36,339
Other	34,971	36,537
Total Investments and Other Property	71,165	72,876
Current Assets
Cash and Cash Equivalents	74,878	123,918
Accounts Receivable—Customer	104,596	93,742
Unbilled Accounts Receivable	52,403	53,568
Allowance for Doubtful Accounts	(6,833)	(6,545)
Materials and Supplies	88,085	93,322
Deferred Income Taxes—Current	59,681	34,260
Fuel Inventory	44,317	62,019
Regulatory Assets—Current	52,763	51,619
Derivative Instruments	5,629	3,165
Investments in Lease Debt	0	9,118
Other	15,354	33,567
Total Current Assets	490,873	551,753
Regulatory and Other Assets
Regulatory Assets—Noncurrent	150,584	191,077
Derivative Instruments	1,180	3,801
Other Assets	24,430	20,559
Total Regulatory and Other Assets	176,194	215,437
Total Assets	4,273,069	4,140,429
Capitalization
Common Stock Equity	1,130,784	1,065,465
Capital Lease Obligations	149,767	262,138
Long-Term Debt	1,507,070	1,498,442
Long-term Debt	1,507,070	1,498,442
Total Capitalization	2,787,621	2,826,045
Current Liabilities
Current Obligations Under Capital Leases	167,659	90,583
Borrowings Under Revolving Credit Facilities	22,000	0
Accounts Payable—Trade	117,503	107,740
Regulatory Liabilities—Current	53,935	43,516
Accrued Taxes Other than Income Taxes	43,880	41,939
Customer Deposits	30,671	34,048
Accrued Employee Expenses	28,148	24,094
Accrued Interest	27,786	31,950
Derivative Instruments	7,534	14,742
Other	17,775	10,517
Total Current Liabilities	516,891	399,129
Deferred Credits and Other Liabilities
Deferred Income Taxes—Noncurrent	481,662	364,756
Regulatory Liabilities—Noncurrent	302,482	279,111
Pension and Other Retiree Benefits	90,923	159,401
Derivative Instruments	7,100	12,709
Other	86,390	99,278
Total Deferred Credits and Other Liabilities	968,557	915,255
Commitments, Contingencies, and Environmental Matters
Total Capitalization and Other Liabilities	4,273,069	4,140,429
TUCSON ELECTRIC POWER COMPANY
Utility Plant
Plant in Service	4,467,667	4,348,041
Utility Plant Under Capital Leases	637,957	582,669
Construction Work in Progress	180,485	98,460
Total Utility Plant	5,286,109	5,029,170
Less Accumulated Depreciation and Amortization	(1,826,977)	(1,783,787)
Less Accumulated Amortization of Capital Lease Assets	(514,677)	(494,962)
Total Utility Plant—Net	2,944,455	2,750,421
Investments And Other Property
Investments in Lease Equity	36,194	36,339
Other	33,488	35,091
Total Investments and Other Property	69,682	71,430
Current Assets
Cash and Cash Equivalents	25,335	79,743
Accounts Receivable—Customer	80,211	71,813
Unbilled Accounts Receivable	34,369	33,782
Allowance for Doubtful Accounts	(4,825)	(4,598)
Accounts Receivable - Due from Affiliates	6,064	5,720
Materials and Supplies	75,200	80,377
Deferred Income Taxes—Current	63,497	37,212
Fuel Inventory	44,027	61,737
Regulatory Assets—Current	42,555	34,345
Derivative Instruments	2,137	2,230
Investments in Lease Debt	0	9,118
Other	12,923	32,163
Total Current Assets	381,493	443,642
Regulatory and Other Assets
Regulatory Assets—Noncurrent	141,030	178,330
Derivative Instruments	167	1,354
Other Assets	19,233	15,869
Total Regulatory and Other Assets	160,430	195,553
Total Assets	3,556,060	3,461,046
Capitalization
Common Stock Equity	925,923	860,927
Capital Lease Obligations	149,767	262,138
Long-Term Debt	1,223,070
Long-term Debt	1,223,070	1,223,442
Total Capitalization	2,298,760	2,346,507
Current Liabilities
Current Obligations Under Capital Leases	167,659	90,583
Accounts Payable—Trade	88,556	82,122
Regulatory Liabilities—Current	23,701	20,822
Accounts Payable—Due to Affiliates	9,153	3,134
Accrued Taxes Other than Income Taxes	34,485	33,060
Customer Deposits	21,354	24,846
Accrued Employee Expenses	24,454	20,715
Accrued Interest	22,785	26,965
Derivative Instruments	5,531	4,899
Other	9,244	7,085
Total Current Liabilities	406,922	314,231
Deferred Credits and Other Liabilities
Deferred Income Taxes—Noncurrent	420,878	319,216
Regulatory Liabilities—Noncurrent	263,270	241,189
Pension and Other Retiree Benefits	84,936	149,718
Derivative Instruments	5,161	10,565
Other	76,133	79,620
Total Deferred Credits and Other Liabilities	850,378	800,308
Commitments, Contingencies, and Environmental Matters
Total Capitalization and Other Liabilities	$ 3,556,060	$ 3,461,046