Income Taxes (Details)		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%	21.00%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent		6.20%	6.20%
Effective Income Tax Rate Reconciliation, Other Regulatory Items, Percent	[1]	(3.70%)	(5.10%)
Regulatory difference - tax credits and tax credit and NOL allowances (net)		(0.70%)	(1.10%)
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent		0.20%	1.00%
Effective Income Tax Rate Reconciliation, Percent		23.00%	22.00%

[1] Regulatory differences for income tax primarily relate to the credit of excess deferred taxes to customers through the average rate assumption method. Income tax benefits associated with the credit of excess deferred credits are offset by corresponding revenue reductions.