Selected Balance Sheet Data

3 Months Ended

Mar. 31, 2019

Balance Sheet Related Disclosures [Abstract]

Selected Balance Sheet Data

Selected Balance Sheet Data

(Millions of Dollars)	March 31, 2019			Dec. 31, 2018
Accounts receivable, net
Accounts receivable	$	394.2		$	330.8
Less allowance for bad debts	(21.1		)	(20.5		)
	$	373.1		$	310.3

(Millions of Dollars)	March 31, 2019		Dec. 31, 2018
Inventories
Materials and supplies	$	62.4	$	61.9
Fuel	64.5		69.5
Natural gas	30.0		66.0
	$	156.9	$	197.4

(Millions of Dollars)	March 31, 2019			Dec. 31, 2018
Property, plant and equipment, net
Electric plant	$	13,733.3		$	13,604.5
Natural gas plant	4,321.5			4,387.6
Common and other property	1,040.4			1,023.7
Plant to be retired (a)	305.7			321.9
Construction work in progress	581.7			573.3
Total property, plant and equipment	19,982.6			19,911.0
Less accumulated depreciation	(4,892.5		)	(4,791.0		)
	$	15,090.1		$	15,120.0

^(a)  In 2018, the CPUC approved early retirement of PSCo’s Comanche Units 1 and 2 in approximately 2022 and 2025, respectively. PSCo also expects Craig Unit 1 to be retired early in 2025. Amounts are presented net of accumulated depreciation.