Long-Term Debt and Liquidity Matters (Tables)

9 Months Ended

Sep. 30, 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 September 30, 2019				As of December 31, 2018
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Pinnacle West	$	449,268	$	449,670	$	448,796	$	443,955
APS	4,985,728		5,617,727		4,689,436		4,789,608
Total	$	5,434,996	$	6,067,397	$	5,138,232	$	5,233,563