Fair Value of Financial Instruments Fair Value Options Quantitative Disclosure (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Low [Member]
Commodity Contracts
Electricity physical forwards	$ 24.00	$ 16.66
Natural gas financial swaps	2.98	2.02
Financial swaps - electricity	31.42	26.76
High [Member]
Commodity Contracts
Electricity physical forwards	161.94	129.75
Natural gas financial swaps	6.34	8.02
Financial swaps - electricity	161.94	68.43
Weighted Average [Member]
Commodity Contracts
Electricity physical forwards	67.03	43.73
Natural gas financial swaps	3.45	2.81
Financial swaps - electricity	80.47	52.46
Assets [Member]
Commodity Contracts
Electricity physical forwards	5,000,000	0
Natural gas financial swaps	26,000,000	5,000,000
Financial swaps - electricity	6,000,000	1,000,000
Total commodity contracts	37,000,000	6,000,000
Liabilities [Member]
Commodity Contracts
Electricity physical forwards	68,000,000	90,000,000
Natural gas financial swaps	1,000,000	1,000,000
Financial swaps - electricity	3,000,000	0
Total commodity contracts	$ 72,000,000	$ 91,000,000