REGULATORY ASSETS AND LIABILITIES (Tables)

6 Months Ended

Jun. 30, 2024

Regulatory Assets and Liabilities Disclosure [Abstract]

Schedule of regulatory assets

(in millions)	June 30, 2024		December 31, 2023
Regulatory assets
Plant retirement related items (1)	$	824.6	$	646.2
Pension and OPEB costs	725.1		731.7
Environmental remediation costs	575.2		596.8
Income tax related items	442.8		449.9
AROs	167.1		162.0
Uncollectible expense	123.9		127.7
System support resource	107.9		113.2
Decoupling (2)	102.1		27.3
Securitization	82.3		85.9
Derivatives	62.7		130.3
Bluewater	53.5		45.3
Energy efficiency programs	30.1		33.9
Other, net	137.7		124.5
Total regulatory assets	$	3,435.0	$	3,274.7
Balance sheet presentation
Other current assets	$	41.9	$	24.9
Regulatory assets	3,393.1		3,249.8
Total regulatory assets	$	3,435.0	$	3,274.7

(1)    Included in plant retirement related items at June 30, 2024, are $116.0 million of capitalized retirement costs related to the new EPA CCR Rule that was enacted in April 2024. See Note 23, Commitments and Contingencies, for more information.

(2)    PGL, NSG, and MERC have decoupling mechanisms. These mechanisms differ by state and allow the utilities to recover the differences between actual and authorized margins for certain customer classes.

Schedule of regulatory liabilities

(in millions)	June 30, 2024		December 31, 2023
Regulatory liabilities
Income tax related items	$	1,852.0	$	1,901.8
Removal costs	1,401.5		1,329.9
Pension and OPEB benefits	300.3		299.2
Energy costs refundable through rate adjustments	143.1		72.4
Derivatives	39.8		19.2
Electric transmission costs	29.5		30.3
Uncollectible expense	24.8		21.2
Energy efficiency programs	19.4		17.2
Other, net	84.2		54.0
Total regulatory liabilities	$	3,894.6	$	3,745.2
Balance sheet presentation
Other current liabilities	$	59.9	$	47.5
Regulatory liabilities	3,834.7		3,697.7
Total regulatory liabilities	$	3,894.6	$	3,745.2