Consolidation and Nature of Operations (Tables)

9 Months Ended

Sep. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of supplemental cash flow information

The following table summarizes supplemental Pinnacle West cash flow information (dollars in thousands):

	Nine Months Ended   September 30,
	2018		2017
Cash paid during the period for:
Income taxes, net of refunds	$	10,091	$	2,185
Interest, net of amounts capitalized	161,875		147,149
Significant non-cash investing and financing activities:
Accrued capital expenditures	$	99,405	$	93,031
Sale of 4CA's 7% interest in Four Corners	68,907		—