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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands | Total | Common Stock | Treasury Stock | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Noncontrolling Interests | ARIZONA PUBLIC SERVICE COMPANY | ARIZONA PUBLIC SERVICE COMPANY Common Stock | ARIZONA PUBLIC SERVICE COMPANY Additional Paid-In Capital | ARIZONA PUBLIC SERVICE COMPANY Retained Earnings | ARIZONA PUBLIC SERVICE COMPANY Accumulated Other Comprehensive Income (Loss) | ARIZONA PUBLIC SERVICE COMPANY Noncontrolling Interests
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2016 |  | $ 4,935,912 | $ 2,596,030 | $ (4,133) | $ 2,255,547 |  | $ (43,822) |  | $ 132,290 | $ 5,037,970 | $ 178,162 | $ 2,421,696 | $ 2,331,245 |  | $ (25,423) |  | $ 132,290
Beginning Balance (in shares) at Dec. 31, 2016 |  |  | 111,392,053 | 55,317 |  |  |  |  |  |  | 71,264,947 |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | 507,949 |  |  | 488,456 |  |  |  | 19,493 | 523,802 |  |  | 504,309 |  |  |  | 19,493
Other comprehensive income (loss) |  | (1,180) |  |  |  |  | (1,180) |  |  | (1,560) |  |  |  |  | (1,560) |  |
Dividends on common stock |  | (301,492) |  |  | (301,492) |  |  |  |  | (301,600) |  |  | (301,600) |  |  |  |
Issuance of common stock |  | 18,775 | $ 18,775 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (in shares) |  |  | 424,117 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of treasury stock | [1] | (17,755) |  | $ (17,755) |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of treasury stock (in shares) | [1] |  |  | (216,911) |  |  |  |  |  |  |  |  |  |  |  |  |
Reissuance of treasury stock for stock-based compensation and other |  | 16,264 |  | $ 16,264 |  |  |  |  |  |  |  |  |  |  |  |  |
Reissuance of treasury stock for stock-based compensation and other (in shares) |  |  |  | 207,765 |  |  |  |  |  |  |  |  |  |  |  |  |
Equity infusion from Pinnacle West |  |  |  |  |  |  |  |  |  | 150,000 |  | 150,000 |  |  |  |  |
Capital activities by noncontrolling interests |  | (22,743) |  |  |  |  |  |  | (22,743) | (22,743) |  |  |  |  |  |  | (22,743)
Ending balance at Dec. 31, 2017 |  | 5,135,730 | $ 2,614,805 | $ (5,624) | 2,442,511 |  | (45,002) |  | 129,040 | 5,385,869 | $ 178,162 | 2,571,696 | 2,533,954 |  | (26,983) |  | 129,040
Ending Balance (in shares) at Dec. 31, 2017 |  |  | 111,816,170 | 64,463 |  |  |  |  |  |  | 71,264,947 |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | 530,540 |  |  | 511,047 |  |  |  | 19,493 | 589,758 |  |  | 570,265 |  |  |  | 19,493
Other comprehensive income (loss) |  | 5,846 |  |  |  |  | 5,846 |  |  | 4,914 |  |  |  |  | 4,914 |  |
Dividends on common stock |  | (320,927) |  |  | (320,927) |  |  |  |  | (321,001) |  |  | (321,001) |  |  |  |
Issuance of common stock |  | 19,460 | $ 19,460 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (in shares) |  |  | 343,726 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of treasury stock | [1] | (10,338) |  | $ (10,338) |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of treasury stock (in shares) | [1] |  |  | (129,903) |  |  |  |  |  |  |  |  |  |  |  |  |
Reissuance of treasury stock for stock-based compensation and other |  | 11,137 |  | $ 11,137 |  |  |  |  |  |  |  |  |  |  |  |  |
Reissuance of treasury stock for stock-based compensation and other (in shares) |  |  |  | 136,231 |  |  |  |  |  |  |  |  |  |  |  |  |
Equity infusion from Pinnacle West |  |  |  |  |  |  |  |  |  | 150,000 |  | 150,000 |  |  |  |  |
Capital activities by noncontrolling interests |  | (22,743) |  |  |  |  |  |  | (22,743) | (22,743) |  |  |  |  |  |  | (22,743)
Reclassification of income tax effects related to new tax reform |  |  |  |  | 8,552 | [2] | (8,552) | [2] |  |  |  |  | 5,038 | [3] | (5,038) | [3] |
Ending balance at Dec. 31, 2018 |  | $ 5,348,705 | $ 2,634,265 | $ (4,825) | 2,641,183 |  | (47,708) |  | 125,790 | 5,786,797 | $ 178,162 | 2,721,696 | 2,788,256 |  | (27,107) |  | 125,790
Ending Balance (in shares) at Dec. 31, 2018 |  | 112,159,896 | 112,159,896 | 58,135 |  |  |  |  |  |  | 71,264,947 |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ 557,813 |  |  | 538,320 |  |  |  | 19,493 | 584,764 |  |  | 565,271 |  |  |  | 19,493
Other comprehensive income (loss) |  | (9,388) |  |  |  |  | (9,388) |  |  | (8,415) |  |  |  |  | (8,415) |  |
Dividends on common stock |  | (341,893) |  |  | (341,893) |  |  |  |  | (341,600) |  |  | (341,600) |  |  |  |
Issuance of common stock |  | 25,296 | $ 25,296 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (in shares) |  |  | 380,230 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of treasury stock | [1] | (11,202) |  | $ (11,202) |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of treasury stock (in shares) | [1] |  |  | (121,493) |  |  |  |  |  |  |  |  |  |  |  |  |
Reissuance of treasury stock for stock-based compensation and other |  | 6,600 |  | $ 6,600 |  |  |  |  |  |  |  |  |  |  |  |  |
Reissuance of treasury stock for stock-based compensation and other (in shares) |  |  |  | 76,082 |  |  |  |  |  |  |  |  |  |  |  |  |
Capital activities by noncontrolling interests |  | (22,743) |  |  |  |  |  |  | (22,743) | (22,743) |  |  |  |  |  |  | (22,743)
Ending balance at Dec. 31, 2019 |  | $ 5,553,188 | $ 2,659,561 | $ (9,427) | $ 2,837,610 |  | $ (57,096) |  | $ 122,540 | $ 5,998,803 | $ 178,162 | $ 2,721,696 | $ 3,011,927 |  | $ (35,522) |  | $ 122,540
Ending Balance (in shares) at Dec. 31, 2019 |  | 112,540,126 | 112,540,126 | 103,546 |  |  |  |  |  |  | 71,264,947 |  |  |  |  |  |
[1] | Primarily represents shares of common stock withheld from certain stock awards for tax purposes.
[2] | In 2018, the Company adopted new accounting guidance and elected to reclassify income tax effects of the Tax Cuts and Jobs Act of 2017 (the "Tax Act") on items within accumulated other comprehensive income to retained earnings.
[3] | In 2018, the Company adopted new accounting guidance and elected to reclassify income tax effects of the Tax Act on items within accumulated other comprehensive income to retained earnings.

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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration