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REGULATORY ASSETS AND LIABILITIES

3 Months Ended

Mar. 31, 2024

Regulatory Assets and Liabilities Disclosure [Abstract]

REGULATORY ASSETS AND LIABILITIES

REGULATORY ASSETS AND LIABILITIES

The following regulatory assets and liabilities were reflected on our balance sheets at March 31, 2024 and December 31, 2023. For more information on our regulatory assets and liabilities, see Note 6, Regulatory Assets and Liabilities, in our 2023 Annual Report on Form 10-K.

(in millions)						March 31, 2024						December 31, 2023
Regulatory assets
Pension and OPEB costs						$	728.9					$	731.7
Plant retirement related items						637.8						646.2
Environmental remediation costs						583.8						596.8
Income tax related items						444.5						449.9
AROs						159.8						162.0
Uncollectible expense						133.7						127.7
System support resource						110.6						113.2
Derivatives						88.7						130.3
Decoupling						87.2						27.3
Securitization						84.1						85.9
Bluewater						51.1						45.3
Energy efficiency programs						29.3						33.9
Other, net						147.4						124.5
Total regulatory assets						$	3,286.9					$	3,274.7
Balance sheet presentation
Other current assets						$	39.9					$	24.9
Regulatory assets						3,247.0						3,249.8
Total regulatory assets						$	3,286.9					$	3,274.7

(in millions)						March 31, 2024						December 31, 2023
Regulatory liabilities
Income tax related items						$	1,862.6					$	1,901.8
Removal costs						1,365.4						1,329.9
Pension and OPEB benefits						300.0						299.2
Energy costs refundable through rate adjustments						119.3						72.4
Electric transmission costs						31.0						30.3
Energy efficiency programs						20.6						17.2
Uncollectible expense						19.0						21.2
Derivatives						15.2						19.2
Other, net						76.3						54.0
Total regulatory liabilities						$	3,809.4					$	3,745.2
Balance sheet presentation
Other current liabilities						$	79.2					$	47.5
Regulatory liabilities						3,730.2						3,697.7
Total regulatory liabilities						$	3,809.4					$	3,745.2

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- Definition

The entire disclosure for detailed information about regulatory assets and liabilities, including current and noncurrent assets created when regulatory agencies permit the deferral of costs to the balance sheet that would otherwise be required to appear on the company's income statement and would be charged against current expenses or revenues, as well as current and noncurrent liabilities created when regulatory agencies permit.

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