Long-Term Debt and Liquidity Matters (Tables)

3 Months Ended

Mar. 31, 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 March 31, 2021				As of December 31, 2020
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Pinnacle West	$	646,525	$	653,395	$	496,321	$	509,050
APS	5,818,520		6,436,224		5,817,945		7,103,791
Total	$	6,465,045	$	7,089,619	$	6,314,266	$	7,612,841