Revenue (Tables)

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

The following table provides detail of Pinnacle West’s consolidated revenue disaggregated by revenue sources (dollars in thousands):


	Year Ended December 31,			Year Ended December 31,		Year Ended December 31,
	2020			2019		2018
Retail Electric Service
Residential	$	1,929,178	(a)	$	1,761,122	$	1,867,370
Non-Residential	1,486,098			1,509,514		1,628,891
Wholesale Energy Sales	93,345			121,805		109,198
Transmission Services for Others	65,859			62,460		60,261
Other Sources	12,502			16,308		25,527
Total Operating Revenues	$	3,586,982		$	3,471,209	$	3,691,247

(a) Residential revenues for the year ended December 31, 2020 reflect a $24 million reduction related to the Arizona Attorney General matter. (See Note 11).

Schedule of Allowance for Doubtful Accounts

The following table provides a rollforward of Pinnacle West’s allowance for doubtful accounts all of which primarily relates to APS (dollars in thousands):


	Year Ended December 31, 2020		Year Ended December 31, 2019		Year Ended December 31, 2018
Allowance for doubtful accounts, balance at beginning of period	$	8,171	$	4,069	$	2,513
Bad debt expense	20,633		11,819		10,870
Actual write-offs	(9,022)		(7,717)		(9,314)
Allowance for doubtful accounts, balance at end of period	$	19,782	$	8,171	$	4,069