Changes in Accumulated Other Comprehensive Loss (Tables)

6 Months Ended

Jun. 30, 2023

Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]

Schedule of Changes in Accumulated Other Comprehensive Loss Including Reclassification Adjustments, Net of Tax, by Component

The following tables show 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
Three Months Ended June 30
Balance March 31, 2023	$	(31,817)		$	281	$	(31,536)
OCI (loss) before reclassifications	(982)			446		(536)
Amounts reclassified from accumulated other comprehensive loss	481		(a)	—		481
Balance June 30, 2023	$	(32,318)		$	727	$	(31,591)
Balance March 31, 2022	$	(52,984)		$	(724)	$	(53,708)
OCI (loss) before reclassifications	(3,213)			1,007		(2,206)
Amounts reclassified from accumulated other comprehensive loss	1,100		(a)	—		1,100
Balance June 30, 2022	$	(55,097)		$	283	$	(54,814)

(a)    These amounts primarily represent amortization of actuarial loss and are included in the computation of net periodic pension cost.  See Note 5.

	Pension and Other Postretirement Benefits			Derivative Instruments		Total
Six Months Ended June 30
Balance December 31, 2022	$	(32,332)		$	897	$	(31,435)
OCI (loss) before reclassifications	(982)			(170)		(1,152)
Amounts reclassified from accumulated other comprehensive loss	996		(a)	—		996
Balance June 30, 2023	$	(32,318)		$	727	$	(31,591)
Balance December 31, 2021	$	(53,885)		$	(976)	$	(54,861)
OCI (loss) before reclassifications	(3,213)			1,259		(1,954)
Amounts reclassified from accumulated other comprehensive loss	2,001		(a)	—		2,001
Balance June 30, 2022	$	(55,097)		$	283	$	(54,814)

(a)    These amounts primarily represent amortization of actuarial loss and are included in the computation of net periodic pension cost.  See Note 5.

The following tables show 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
Three Months Ended June 30
Balance March 31, 2023	$	(15,139)
OCI (loss) before reclassifications	(839)
Amounts reclassified from accumulated other comprehensive loss	431		(a)
Balance June 30, 2023	$	(15,547)
Balance March 31, 2022	$	(34,060)
OCI (loss) before reclassifications	(3,160)
Amounts reclassified from accumulated other comprehensive loss	999		(a)
Balance June 30, 2022	$	(36,221)

(a) These amounts primarily represent amortization of actuarial loss and are included in the computation of net periodic pension cost.  See Note 5.

	Pension and Other Postretirement Benefits
Six Months Ended June 30
Balance December 31, 2022	$	(15,596)
OCI (loss) before reclassifications	(839)
Amounts reclassified from accumulated other comprehensive loss	888		(a)
Balance June 30, 2023	$	(15,547)
Balance December 31, 2021	$	(34,880)
OCI (loss) before reclassifications	(3,160)
Amounts reclassified from accumulated other comprehensive loss	1,819		(a)
Balance June 30, 2022	$	(36,221)

(a) These amounts primarily represent amortization of actuarial loss and are included in the computation of net periodic pension cost.  See Note 5.