Selected Balance Sheet Data

3 Months Ended

Mar. 31, 2020

Balance Sheet Related Disclosures [Abstract]

Selected Balance Sheet Data

(Millions of Dollars)	March 31, 2020			Dec. 31, 2019
Accounts receivable, net
Accounts receivable	$	375.0		$	382.8
Less allowance for bad debts	(23.8		)	(23.0		)
Accounts receivable, net	$	351.2		$	359.8

(Millions of Dollars)	March 31, 2020		Dec. 31, 2019
Inventories
Materials and supplies	$	177.8	$	175.6
Fuel	96.1		103.2
Natural gas	6.8		26.0
Total Inventories	$	280.7	$	304.8

(Millions of Dollars)	March 31, 2020			Dec. 31, 2019
Property, plant and equipment
Electric plant	$	18,548.7		$	18,519.5
Natural gas plant	1,578.0			1,562.9
Common and other property	903.9			886.7
Construction work in progress	980.5			846.3
Total property, plant and equipment	22,011.1			21,815.4
Less accumulated depreciation	(8,065.8		)	(7,945.3		)
Nuclear fuel	2,913.2			2,909.8
Less accumulated amortization	(2,568.4		)	(2,535.9		)
Property, plant and equipment, net	$	14,290.1		$	14,244.0