Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Schedule of minimum future commitments related to purchase obligations

The following table shows our minimum future commitments related to these purchase obligations as of December 31, 2023, including those of our subsidiaries:

				Payments Due By Period
(in millions)	Date Contracts Extend Through	Total Amounts Committed		2024		2025		2026		2027		2028		Later Years
Electric utility:
Nuclear	2033	$	6,280.6	$	600.3	$	634.5	$	681.6	$	730.4	$	782.6	$	2,851.2
Coal supply and transportation	2026	549.0		358.3		164.6		26.1		—		—		—
Purchased power	2063	333.5		56.7		56.4		57.5		52.1		48.4		62.4
Other	2043	100.6		13.9		13.3		12.9		11.6		10.2		38.7
Natural gas utility:
Supply and transportation	2048	1,777.2		381.2		274.9		214.8		197.4		155.7		553.2
Non-utility energy infrastructure:
Purchased power	2050	611.8		34.4		34.8		35.9		36.7		34.8		435.2
Natural gas storage and transportation	2048	4.8		4.0		—		—		—		0.1		0.7
Total		$	9,657.5	$	1,448.8	$	1,178.5	$	1,028.8	$	1,028.2	$	1,031.8	$	3,941.4

Schedule of regulatory assets and reserves related to manufactured gas plant sites

We have established the following regulatory assets and reserves for manufactured gas plant sites as of December 31:

(in millions)	2023		2022
Regulatory assets	$	596.8	$	610.7
Reserves for future environmental remediation	463.7		499.6