Schedule of Asset Retirement Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Asset Retirement Obligation Disclosure [Abstract]
Trojan decommissioning activities	$ 170	$ 139
Utility plant	86	95
Non-utility property	33	35
Asset Retirement Obligation	289	269	$ 291	$ 279
Asset Retirement Obligation, Current	32	31
Asset Retirement Obligations, Noncurrent	257	238
Asset Retirement Obligation, Cash Paid to Settle	$ (27)	$ (18)	$ (18)