Regulatory Matters (Tables)

6 Months Ended

Jun. 30, 2024

Regulated Operations [Abstract]

Schedule of Regulatory Assets and Liabilities

We had the following regulatory assets and liabilities (in millions):

	As of			As of
	June 30, 2024			December 31, 2023
Regulatory assets
Winter Storm Uri	$	129.0		$	199.6
Deferred energy and fuel cost adjustments		57.8			55.1
Deferred gas cost adjustments		9.6			4.1
Gas price derivatives		0.5			5.1
Deferred taxes on AFUDC		7.5			7.1
Employee benefit plans and related deferred taxes		87.1			89.3
Environmental		10.6			2.9
Loss on reacquired debt		16.5			17.4
Deferred taxes on flow through accounting		81.1			74.7
Decommissioning costs		2.4			2.4
Other regulatory assets		22.7			22.4
Total regulatory assets		424.8			480.1
Less current regulatory assets		(142.9	)		(175.7	)
Regulatory assets, non-current	$	281.9		$	304.4
Regulatory liabilities
Deferred energy and gas costs	$	86.5		$	88.9
Employee benefit plan costs and related deferred taxes		35.1			36.2
Cost of removal		187.7			181.9
Excess deferred income taxes		241.8			247.1
Other regulatory liabilities		6.3			12.5
Total regulatory liabilities		557.4			566.6
Less current regulatory liabilities		(90.3	)		(98.9	)
Regulatory liabilities, non-current	$	467.1		$	467.7