Long-Term Debt and Liquidity Matters (Tables)

3 Months Ended

Mar. 31, 2019

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, 2019				As of December 31, 2018
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Pinnacle West	$	448,953	$	446,835	$	448,796	$	443,955
APS	4,687,155		4,942,057		4,689,436		4,789,608
Total	$	5,136,108	$	5,388,892	$	5,138,232	$	5,233,563