Revenue (Tables)

12 Months Ended

Dec. 31, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of revenue

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,
	2021		2020			2019
Retail Electric Service
Residential	$	1,913,324	$	1,929,178	(a)	$	1,761,122
Non-Residential	1,586,940		1,486,098			1,509,514
Wholesale Energy Sales	187,640		93,345			121,805
Transmission Services for Others	99,285		65,859			62,460
Other Sources	16,646		12,502			16,308
Total Operating Revenues	$	3,803,835	$	3,586,982		$	3,471,209

(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 (dollars in thousands):

	Year Ended December 31, 2021		Year Ended December 31, 2020		Year Ended December 31, 2019
Allowance for doubtful accounts, balance at beginning of period	$	19,782	$	8,171	$	4,069
Bad debt expense	22,251		20,633		11,819
Actual write-offs	(16,679)		(9,022)		(7,717)
Allowance for doubtful accounts, balance at end of period	$	25,354	$	19,782	$	8,171