XML 81 R60.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Changes in Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2023
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] |
Schedule of Changes in Accumulated Other Comprehensive Loss Including Reclassification Adjustments, by Component | The following table shows the changes in Pinnacle West’s consolidated accumulated other comprehensive loss, including reclassification adjustments, net of tax, by component (dollars in thousands):
| Pension and Other Postretirement Benefits |  |  |  | Derivative Instruments |  |  |  | Total
Balance at December 31, 2021 | $ | (53,885) |  |  |  |  | $ | (976) |  |  |  |  | $ | (54,861) |
OCI (loss) before reclassifications | 17,550 |  |  |  |  | 1,873 |  |  |  |  | 19,423 |
Amounts reclassified from accumulated other comprehensive loss | 4,003 |  |  | (a) |  | — |  |  |  |  | 4,003 |
Balance at December 31, 2022 | (32,332) |  |  |  |  | 897 |  |  |  |  | (31,435) |
OCI (loss) before reclassifications | (4,420) |  |  |  |  | 713 |  |  |  |  | (3,707) |
Amounts reclassified from accumulated other comprehensive loss | 1,998 |  |  | (a) |  | — |  |  |  |  | 1,998 |
Balance at December 31, 2023 | $ | (34,754) |  |  |  |  | $ | 1,610 |  |  |  |  | $ | (33,144) |
(a)These amounts primarily represent amortization of actuarial loss and are included in the computation of net periodic pension cost. See Note 7. The following table shows the changes in APS’s consolidated accumulated other comprehensive loss, including reclassification adjustments, net of tax, by component (dollars in thousands):
| Pension and Other Postretirement Benefits |  |  |  |  |  |  | Total
Balance at December 31, 2021 | $ | (34,880) |  |  |  |  |  |  |  | $ | (34,880) |
OCI (loss) before reclassifications | 15,646 |  |  |  |  |  |  |  | 15,646 |
Amounts reclassified from accumulated other comprehensive loss | 3,638 |  |  | (a) |  |  |  |  | 3,638 |
Balance at December 31, 2022 | (15,596) |  |  |  |  |  |  |  | (15,596) |
OCI (loss) before reclassifications | (3,383) |  |  |  |  |  |  |  | (3,383) |
Amounts reclassified from accumulated other comprehensive loss | 1,760 |  |  | (a) |  |  |  |  | 1,760 |
Balance at December 31, 2023 | $ | (17,219) |  |  |  |  |  |  |  | $ | (17,219) |
(a)These amounts primarily represent amortization of actuarial loss and are included in the computation of net periodic pension cost. See Note 7.

X
- References No definition available. + Details
Name: | us-gaap_ComprehensiveIncomeNetOfTaxAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481674/830-30-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481694/830-30-45-20 + Details
Name: | us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration