Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Summary of supplemental cash flow information

The following table summarizes supplemental Pinnacle West cash flow information for each of the last three years (dollars in thousands):

	Year ended December 31,
	2014			2013		2012
Cash paid (received) during the period for:
Income taxes, net of refunds	$	(102,154	)	$	18,537	$	2,543
Interest, net of amounts capitalized	177,074			184,010		200,923
Significant non-cash investing and financing activities:
Accrued capital expenditures	$	44,712		$	33,184	$	26,208
Dividends declared but not paid	65,790			62,528		59,789
Liabilities assumed relating to acquisition of SCE Four Corners’ interest (see Note 3)	—			145,609		—