Property, Plant, and Equipment (Tables)

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment -Balances

Property, plant, and equipment consisted of the following at December 31:

(in millions)	2018		2017
Electric – generation	$	6,410.6	$	6,071.8
Electric – distribution	6,534.6		6,137.5
Natural gas – distribution, storage, and transmission	10,766.3		10,055.9
Property, plant, and equipment to be retired, net	174.8		930.6
Other	1,649.1		1,381.5
Less: Accumulated depreciation	7,573.6		7,021.8
Net	17,961.8		17,555.5
CWIP	707.5		508.2
Net utility property, plant, and equipment	18,669.3		18,063.7
We Power generation	3,244.4		3,215.9
Renewable generation	193.3		—
Natural gas storage	244.8		244.8
Net non-utility energy infrastructure	3,682.5		3,460.7
Corporate services	171.0		169.6
Other	127.1		166.9
Less: Accumulated depreciation	731.5		671.3
Net	3,249.1		3,125.9
CWIP	82.5		157.4
Net non-utility and other property, plant, and equipment	3,331.6		3,283.3
Total property, plant, and equipment	$	22,000.9	$	21,347.0

Schedule of changes to our severance liability

In December 2017, a severance liability in the amount of $29.4 million was recorded in other current liabilities on our balance sheets within the Wisconsin segment related to these plant retirements.

(in millions)
Severance liability at December 31, 2017	$	29.4
Severance payments	(10.7		)
Other	(3.0		)
Total severance liability at December 31, 2018	$	15.7