Income Taxes Schedule of Deferred tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deferred income tax assets:
Employee benefits	$ 99	$ 114
Deferred income taxes	75	39
Deferred Tax Assets, tax credits, net of valuation allowance	102	98
Total deferred income tax assets	276	251
Deferred income tax liabilities:
Depreciation and amortization	547	536
Deferred Tax Liabilities, Derivatives	54	0
Regulatory assets	101	121
Deferred Tax Liabilities, Other	13	7
Deferred Tax Liabilities, Gross, Noncurrent	715	664
Total deferred income tax liabilities	$ 439	$ 413