| **APS - CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands**              | 12 Months Ended |
|---------------------------------------------------------------------------------------|-----------------|
||
| **CASH FLOWS FROM OPERATING ACTIVITIES**                                              |            |   |   |
| Net income                                                                            | $ 518,781       | $ 500,826 | $ 635,944 |
| **Adjustments to reconcile net income to net cash provided by operating activities:** |            |   |   |
| Depreciation and amortization including nuclear fuel                                  | 854,136         | 817,814 | 719,141 |
| Deferred fuel and purchased power                                                     | (549,877)       | (291,992) | (256,871) |
| Deferred fuel and purchased power amortization                                        | 547,243         | 219,579 | 44,557 |
| Allowance for equity funds used during construction                                   | (53,118)        | (45,263) | (41,737) |
| Deferred income taxes                                                                 | (24,310)        | 43,202 | 117,471 |
| Deferred investment tax credit                                                        | 77,065          | (5,893) | (4,802) |
| **Changes in current assets and liabilities:**                                        |            |   |   |
| Customer and other receivables                                                        | (61,983)        | (63,869) | (72,559) |
| Accrued unbilled revenues                                                             | (2,789)         | (30,784) | (1,783) |
| Materials, supplies and fossil fuel                                                   | (42,911)        | (83,469) | (32,870) |
| Income tax receivable                                                                 | 13,754          | (6,572) | (722) |
| Other current assets                                                                  | (19,550)        | 76,089 | (22,770) |
| Accounts payable                                                                      | (75,623)        | 90,076 | 20,267 |
| Accrued taxes                                                                         | 2,393           | (4,205) | 9,094 |
| Other current liabilities                                                             | 40,510          | (1,856) | (51,736) |
| Change in long-term regulatory assets                                                 | (53,112)        | (12,432) | 17,012 |
| Change in long-term regulatory liabilities                                            | 28,495          | (332,470) | 57,549 |
| Change in other long-term assets                                                      | (195,598)       | 159,030 | (345,470) |
| Change in operating lease assets                                                      | 90,525          | 105,359 | 116,009 |
| Change in other long-term liabilities                                                 | 63,080          | 170,359 | 78,219 |
| Change in operating lease liabilities                                                 | (65,779)        | (103,671) | (108,365) |
| Net cash provided by operating activities                                             | 1,207,697       | 1,241,441 | 860,014 |
| **CASH FLOWS FROM INVESTING ACTIVITIES**                                              |            |   |   |
| Capital expenditures                                                                  | (1,846,370)     | (1,707,490) | (1,473,475) |
| Contributions in aid of construction                                                  | 180,866         | 137,436 | 105,654 |
| Allowance for borrowed funds used during construction                                 | (43,564)        | (28,030) | (21,052) |
| Proceeds from nuclear decommissioning trust sales and other special use funds         | 1,679,722       | 1,207,713 | 1,720,966 |
| Investment in nuclear decommissioning trust and other special use funds               | (1,681,845)     | (1,212,063) | (1,725,480) |
| Other                                                                                 | (6,458)         | (15,612) | 6,458 |
| Net cash used for investing activities                                                | (1,694,249)     | (1,618,046) | (1,386,929) |
| **CASH FLOWS FROM FINANCING ACTIVITIES**                                              |            |   |   |
| Issuance of long-term debt                                                            | 689,349         | 875,537 | 746,999 |
| Short-term borrowings and (repayments) — net                                    | 241,900         | 48,720 | 142,000 |
| Dividends paid on common stock                                                        | (386,486)       | (378,881) | (369,478) |
| Noncontrolling interests                                                              | (21,255)        | (21,255) | (21,255) |
| Net cash provided by financing activities                                             | 486,675         | 371,468 | 476,916 |
| NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS                                  | 123             | (5,137) | (49,999) |
| CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR                                        | 4,832           | 9,969 | 59,968 |
| CASH AND CASH EQUIVALENTS AT END OF YEAR                                              | 4,955           | 4,832 | 9,969 |
| Arizona Public Service Company                                                        |            |   |   |
| **CASH FLOWS FROM OPERATING ACTIVITIES**                                              |            |   |   |
| Net income                                                                            | 564,561         | 542,153 | 649,503 |
| **Adjustments to reconcile net income to net cash provided by operating activities:** |            |   |   |
| Depreciation and amortization including nuclear fuel                                  | 854,051         | 817,729 | 719,039 |
| Deferred fuel and purchased power                                                     | (549,877)       | (291,992) | (256,871) |
| Deferred fuel and purchased power amortization                                        | 547,243         | 219,579 | 44,557 |
| Allowance for equity funds used during construction                                   | (53,118)        | (45,263) | (41,737) |
| Deferred income taxes                                                                 | (10,314)        | (6,817) | 128,852 |
| Deferred investment tax credit                                                        | 77,065          | (5,893) | (4,802) |
| **Changes in current assets and liabilities:**                                        |            |   |   |
| Customer and other receivables                                                        | (62,716)        | (60,930) | (72,101) |
| Accrued unbilled revenues                                                             | (2,789)         | (30,784) | (1,783) |
| Materials, supplies and fossil fuel                                                   | (42,911)        | (83,469) | (32,870) |
| Income tax receivable                                                                 | 1,102           | 9,654 | (10,756) |
| Other current assets                                                                  | (20,243)        | 59,970 | (25,637) |
| Accounts payable                                                                      | (70,622)        | 79,492 | 23,510 |
| Accrued taxes                                                                         | 5,542           | 4,734 | 3,042 |
| Other current liabilities                                                             | 62,212          | 1,190 | (61,297) |
| Change in long-term regulatory assets                                                 | 53,112          | 12,432 | (17,012) |
| Change in long-term regulatory liabilities                                            | 28,495          | (332,470) | 57,549 |
| Change in other long-term assets                                                      | (188,483)       | 170,587 | (330,642) |
| Change in operating lease assets                                                      | 90,234          | 105,058 | 115,850 |
| Change in other long-term liabilities                                                 | 58,574          | 168,503 | 87,376 |
| Change in operating lease liabilities                                                 | (65,482)        | (103,361) | (108,216) |
| Net cash provided by operating activities                                             | 1,275,636       | 1,230,102 | 865,554 |
| **CASH FLOWS FROM INVESTING ACTIVITIES**                                              |            |   |   |
| Capital expenditures                                                                  | (1,825,585)     | (1,655,051) | (1,471,795) |
| Contributions in aid of construction                                                  | 180,866         | 137,436 | 105,654 |
| Allowance for borrowed funds used during construction                                 | (39,030)        | (26,839) | (21,052) |
| Proceeds from nuclear decommissioning trust sales and other special use funds         | 1,679,722       | 1,207,713 | 1,720,966 |
| Investment in nuclear decommissioning trust and other special use funds               | (1,681,845)     | (1,212,063) | (1,725,480) |
| Other                                                                                 | (1,397)         | (727) | 273 |
| Net cash used for investing activities                                                | (1,687,269)     | (1,549,531) | (1,391,434) |
| **CASH FLOWS FROM FINANCING ACTIVITIES**                                              |            |   |   |
| Issuance of long-term debt                                                            | 496,025         | 524,852 | 446,999 |
| Short-term borrowings and (repayments) — net                                    | 180,970         | 46,300 | 278,700 |
| Dividends paid on common stock                                                        | (393,600)       | (385,800) | (376,500) |
| Equity infusion from Pinnacle West                                                    | 150,000         | 150,000 | 150,000 |
| Noncontrolling interests                                                              | (21,255)        | (21,255) | (21,255) |
| Net cash provided by financing activities                                             | 412,140         | 314,097 | 477,944 |
| NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS                                  | 507             | (5,332) | (47,936) |
| CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR                                        | 4,042           | 9,374 | 57,310 |
| CASH AND CASH EQUIVALENTS AT END OF YEAR                                              | $ 4,549         | $ 4,042 | $ 9,374 |

| X                                                                                                                                                                                                                                                               |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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Deferred Investment Tax Credit (Expense)
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| X                                                                                                                                                                                                                                                                                                          |
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The amortization of deferred fuel and purchased power costs.
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| X                                                                                                                                                                                                                                                                                               |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Increase (Decrease) In Operating Lease, Right-Of-Use Asset
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| X                                                                                                                                                                                                                                                                                                                                                                               |
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| - Definition
Payments to Acquire Investments to be Held in Decommissioning Trust Fund And Other Special Use Funds
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| X                                                                                                                                                                                                                                                                               |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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Proceeds from (Repayments of) Short-term Debt, Net
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Proceeds from Decommissioning Trust Fund Assets And Other Special Use Funds
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| - Definition
Cash inflow due to change during the period in the allowance for other funds used during construction classified as an investing activity.
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| - Definition
Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.
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| - Definition
Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.
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| - Definition
The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.
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| - Definition
The increase (decrease) during the reporting period of the sum of amounts due within one year (or one business cycle) from customers for the credit sale of goods and services; and from note holders for outstanding loans.
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| - Definition
The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.
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| - Definition
The increase (decrease) during the reporting period of all taxes owed but not paid, including income, property and other taxes.
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| - Definition
Amount of increase (decrease) in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.
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| - Definition
The increase (decrease) during the reporting period in income taxes receivable, which represents the amount due from tax authorities for refunds of overpayments or recoveries of income taxes paid.
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| - Definition
The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities.
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| - Definition
Amount of increase (decrease) in obligation for operating lease.
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| - Definition
The increase (decrease) during the reporting period in other expenses incurred but not yet paid.
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Amount of increase (decrease) in operating assets classified as other.
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Amount of increase (decrease) in operating liabilities classified as other.
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The increase (decrease) during the reporting period in the value of other assets that are created when regulatory agencies permits public utilities to defer costs to the balance sheet.
+ References
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| - Definition
The increase (decrease) during the reporting period in the amount of outstanding money paid in advance for goods or services that bring economic benefits for future periods.
+ References
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| - Definition
The increase (decrease) during the reporting period in unrecovered fuel costs for a regulated utility company.
+ References
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| - Definition
The increase (decrease) during the reporting period in regulated liabilities. Regulated liabilities are created when regulatory agency permits an entity to defer revenues to the balance sheet.
+ References
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| - Definition
Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.
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| - References
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| - Definition
Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.
+ References
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| - References
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| - Definition
Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.
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| - References
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| - Definition
Amount of cash (inflow) outflow from investing activities classified as other.
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| - Definition
Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.
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| - Definition
The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.
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| - Definition
Amount of cash outflow to a noncontrolling interest. Includes, but not limited to, reduction of noncontrolling interest ownership. Excludes dividends paid to the noncontrolling interest.
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| - Definition
The cash inflow from developers, builders, governmental agencies and municipalities that provide the entity with cash to extend its construction services to their properties.
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| - Definition
The cash inflow from parent as a source of financing that is recorded as additional paid in capital.
+ References
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| - Definition
The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.
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| - Definition
The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.
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| - Definition
The component of the allowance for funds used during construction during the period based on an assumed rate of return on equity funds used in financing the construction of regulated assets.
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