Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2023

Regulatory assets were comprised of the following items:


At December 31, (in millions)	2023		2022
Regulatory Assets
Unrecognized pension and other postretirement benefit costs (see Note 16)	$	561.6	$	607.5
Deferred pension and other postretirement benefit costs (see Note 16)	59.7		72.2
Environmental costs (see Note 19-D.)	40.6		41.4
Regulatory effects of accounting for income taxes (see Note 1-N. and Note 15)	163.5		158.0
Under-recovered gas and fuel costs (see Note 1-J.)	12.7		85.5
Depreciation	201.9		191.3

Post-in-service carrying charges	269.9		251.5



Safety activity costs	206.6		200.7
DSM programs	25.0		37.5
Retired coal generating stations	682.0		744.0
Losses on commodity price risk programs (See Note 13)	24.4		10.0
Deferred property taxes	72.3		68.5
Renewable energy investments (See Note 1-S. and Note 4)	60.8		37.7
Other	79.2		75.0
Total Regulatory Assets	$	2,460.2	$	2,580.8
Less: Current Portion	214.3		233.2
Total Noncurrent Regulatory Assets	$	2,245.9	$	2,347.6

Regulatory liabilities were comprised of the following items:


At December 31, (in millions)	2023		2022
Regulatory Liabilities
Over-recovered gas and fuel costs (see Note 1-J.)	$	144.5	$	20.6
Cost of removal (see Note 11)	597.2		675.9
Regulatory effects of accounting for income taxes (see Note 1-N. and Note 15)	849.9		996.3
Deferred pension and other postretirement benefit costs (see Note 16)	54.0		66.8
Gains on commodity price risk programs (See Note 13)	23.3		90.0
Customer Assistance Programs	19.8		32.9
Off-Systems sales sharing	19.0		12.3
HLBV Adjustments under ASC 980	18.1		5.4
Rate Refunds	16.1		51.4
Other	47.4		61.0
Total Regulatory Liabilities	$	1,789.3	$	2,012.6
Less: Current Portion	278.6		236.8
Total Noncurrent Regulatory Liabilities	$	1,510.7	$	1,775.8