CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
CURRENT ASSETS
Cash and cash equivalents	$ 10,283	$ 5,766
Customer and other receivables	266,426	267,887
Accrued unbilled revenues	128,165	137,170
Allowance for doubtful accounts	(8,171)	(4,069)
Materials and supplies (at average cost)	331,091	269,065
Fossil fuel (at average cost)	14,829	25,029
Income tax receivable (Note 5)	21,727	0
Assets from risk management activities (Note 17)	515	1,113
Deferred fuel and purchased power regulatory asset (Note 4)	70,137	37,164
Other regulatory assets (Note 4)	133,070	129,738
Other current assets	61,958	56,128
Total current assets	1,030,030	924,991
INVESTMENTS AND OTHER ASSETS
Nuclear decommissioning trust (Notes 14 and 20)	1,010,775	851,134
Other special use funds (Notes 14 and 20)	245,095	236,101
Other assets	96,953	103,247
Total investments and other assets	1,352,823	1,190,482
PROPERTY, PLANT AND EQUIPMENT (Notes 1, 7 and 10)
Plant in service and held for future use	19,836,292	18,736,628
Accumulated depreciation and amortization	(6,637,857)	(6,366,014)
Net	13,198,435	12,370,614
Construction work in progress	808,133	1,170,062
Palo Verde sale leaseback, net of accumulated depreciation of $249,144 and $245,275 (Note 19)	101,906	105,775
Intangible assets, net of accumulated amortization of $652,902 and $591,202	290,564	262,902
Nuclear fuel, net of accumulated amortization of $137,330 and $137,850	123,500	120,217
Total property, plant and equipment	14,522,538	14,029,570
DEFERRED DEBITS
Regulatory assets (Notes 1, 4 and 5)	1,304,073	1,342,941
Operating Lease, Right-of-Use Asset	145,813	0
Assets for other postretirement benefits (Note 8)	90,570	46,906
Other	33,400	129,312
Total deferred debits	1,573,856	1,519,159
Total Assets	18,479,247	17,664,202
CURRENT LIABILITIES
Accounts payable	346,448	277,336
Accrued taxes	144,899	154,819
Accrued interest	53,534	61,107
Common dividends payable	87,982	82,675
Short-term borrowings (Note 6)	114,675	76,400
Current maturities of long-term debt (Note 7)	800,000	500,000
Customer deposits	64,908	91,174
Liabilities from risk management activities (Note 17)	38,946	35,506
Liabilities for asset retirements (Note 12)	11,025	19,842
Operating lease liabilities (Note 9)	12,713	0
Regulatory liabilities (Note 4)	234,912	165,876
Other current liabilities	168,323	184,229
Total current liabilities	2,078,365	1,648,964
LONG-TERM DEBT LESS CURRENT MATURITIES (Note 7)	4,832,558	4,638,232
DEFERRED CREDITS AND OTHER
Deferred income taxes (Note 5)	1,992,339	1,807,421
Regulatory liabilities (Notes 1, 4, 5 and 8)	2,267,835	2,325,976
Liabilities for asset retirements (Note 12)	646,193	706,703
Liabilities for pension benefits (Note 8)	280,185	443,170
Liabilities from risk management activities (Note 17)	33,186	24,531
Customer advances	215,330	137,153
Coal mine reclamation	165,695	212,785
Deferred investment tax credit	196,468	200,405
Unrecognized tax benefits (Note 5)	6,189	22,517
Operating lease liabilities (Note 9)	51,872	0
Other	159,844	147,640
Total deferred credits and other	6,015,136	6,028,301
COMMITMENTS AND CONTINGENCIES (SEE NOTES)
EQUITY
Common stock, no par value; authorized 150,000,000 shares, 112,540,126 and 112,159,896 issued at respective dates	2,659,561	2,634,265
Treasury stock at cost; 103,546 shares at end of 2019 and 58,135 shares at end of 2018	(9,427)	(4,825)
Total common stock	2,650,134	2,629,440
Retained earnings	2,837,610	2,641,183
Accumulated other comprehensive loss	(57,096)	(47,708)
Total shareholders’ equity	5,430,648	5,222,915
Noncontrolling interests (Note 19)	122,540	125,790
Total equity	5,553,188	5,348,705
Total Liabilities and Equity	18,479,247	17,664,202
ARIZONA PUBLIC SERVICE COMPANY
CURRENT ASSETS
Cash and cash equivalents	10,169	5,707
Customer and other receivables	255,479	257,654
Accrued unbilled revenues	128,165	137,170
Allowance for doubtful accounts	(8,171)	(4,069)
Materials and supplies (at average cost)	331,091	269,065
Fossil fuel (at average cost)	14,829	25,029
Income tax receivable (Note 5)	7,313	0
Assets from risk management activities (Note 17)	515	1,113
Deferred fuel and purchased power regulatory asset (Note 4)	70,137	37,164
Other regulatory assets (Note 4)	133,070	129,738
Other current assets	38,895	35,111
Total current assets	981,492	893,682
INVESTMENTS AND OTHER ASSETS
Nuclear decommissioning trust (Notes 14 and 20)	1,010,775	851,134
Other special use funds (Notes 14 and 20)	245,095	236,101
Other assets	43,781	40,817
Total investments and other assets	1,299,651	1,128,052
PROPERTY, PLANT AND EQUIPMENT (Notes 1, 7 and 10)
Plant in service and held for future use	19,832,805	18,733,142
Accumulated depreciation and amortization	(6,634,597)	(6,362,771)
Net	13,198,208	12,370,371
Construction work in progress	808,133	1,170,062
Palo Verde sale leaseback, net of accumulated depreciation of $249,144 and $245,275 (Note 19)	101,906	105,775
Intangible assets, net of accumulated amortization of $652,902 and $591,202	290,409	262,746
Nuclear fuel, net of accumulated amortization of $137,330 and $137,850	123,500	120,217
Total property, plant and equipment	14,522,156	14,029,171
DEFERRED DEBITS
Regulatory assets (Notes 1, 4 and 5)	1,304,073	1,342,941
Operating Lease, Right-of-Use Asset	144,024	0
Assets for other postretirement benefits (Note 8)	86,736	43,212
Other	32,591	128,265
Total deferred debits	1,567,424	1,514,418
Total Assets	18,370,723	17,565,323
CURRENT LIABILITIES
Accounts payable	338,006	266,277
Accrued taxes	136,328	176,357
Accrued interest	52,619	60,228
Common dividends payable	88,000	82,700
Current maturities of long-term debt (Note 7)	350,000	500,000
Customer deposits	64,908	91,174
Liabilities from risk management activities (Note 17)	38,946	35,506
Liabilities for asset retirements (Note 12)	11,025	19,842
Operating lease liabilities (Note 9)	12,549	0
Regulatory liabilities (Note 4)	234,912	165,876
Other current liabilities	164,736	178,137
Total current liabilities	1,492,029	1,576,097
LONG-TERM DEBT LESS CURRENT MATURITIES (Note 7)	4,833,133	4,189,436
DEFERRED CREDITS AND OTHER
Deferred income taxes (Note 5)	2,033,096	1,812,664
Regulatory liabilities (Notes 1, 4, 5 and 8)	2,267,835	2,325,976
Liabilities for asset retirements (Note 12)	646,193	706,703
Liabilities for pension benefits (Note 8)	262,243	425,404
Liabilities from risk management activities (Note 17)	33,186	24,531
Customer advances	215,330	137,153
Coal mine reclamation	165,695	212,785
Deferred investment tax credit	196,468	200,405
Unrecognized tax benefits (Note 5)	40,188	41,861
Operating lease liabilities (Note 9)	50,092	0
Other	136,432	125,511
Total deferred credits and other	6,046,758	6,012,993
COMMITMENTS AND CONTINGENCIES (SEE NOTES)
EQUITY
Total common stock	178,162	178,162
Additional paid-in capital	2,721,696	2,721,696
Retained earnings	3,011,927	2,788,256
Accumulated other comprehensive loss	(35,522)	(27,107)
Total shareholders’ equity	5,876,263	5,661,007
Noncontrolling interests (Note 19)	122,540	125,790
Total equity	5,998,803	5,786,797
Total capitalization	10,831,936	9,976,233
Total Liabilities and Equity	$ 18,370,723	$ 17,565,323