Long-Term Debt and Liquidity Matters (Tables)

9 Months Ended

Sep. 30, 2021

Debt Disclosure [Abstract]

Schedule of estimated fair value of long-term debt, including current maturities

The following table presents the estimated fair value of our long-term debt, including current maturities (dollars in thousands):

	As of September 30, 2021				As of December 31, 2020
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Pinnacle West	$	646,934	$	651,160	$	496,321	$	509,050
APS	6,266,212		7,080,893		5,817,945		7,103,791
Total	$	6,913,146	$	7,732,053	$	6,314,266	$	7,612,841