Fair Value of Financial Instruments Fair Value Options Quantitative Disclosure (Details) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Low [Member]
Commodity Contracts
Electricity physical forwards	$ 24.00	$ 37.53
Natural gas financial swaps	2.09	2.25
Financial swaps - electricity	55.00	65.30
High [Member]
Commodity Contracts
Electricity physical forwards	147.00	153.33
Natural gas financial swaps	4.76	8.89
Financial swaps - electricity	147.00	107.31
Weighted Average [Member]
Commodity Contracts
Electricity physical forwards	80.71	84.58
Natural gas financial swaps	2.65	3.37
Financial swaps - electricity	92.67	91.33
Assets [Member]
Commodity Contracts
Electricity physical forwards	6,000,000	14,000,000
Natural gas financial swaps	0	0
Financial swaps - electricity	4,000,000	0
Total commodity contracts	10,000,000	14,000,000
Liabilities [Member]
Commodity Contracts
Electricity physical forwards	32,000,000	43,000,000
Natural gas financial swaps	23,000,000	16,000,000
Financial swaps - electricity	0	0
Total commodity contracts	$ 55,000,000	$ 59,000,000