Commitments and Contingencies, Asset Retirement Obligations (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning balance		$ 147	$ 116
Accretion		6	5
Ending balance		153	147
Cash flow revisions	[1]		26
Electric Plant Steam Production Asbestos
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning balance		83	54
Accretion		4	3
Ending balance		87	83
Electric Plant Wind Production [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning balance		54	52
Accretion		2	2
Ending balance		56	54
Cash flow revisions	[1]		0
Electric Plant Distribution
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning balance		10	10
Accretion		0	0
Ending balance		$ 10	10
Cash flow revisions	[1]		$ 0

[1] In 2022, AROs were revised for changes in estimates of cash flows. Revisions in steam and other production AROs primarily related to changes in costs for steam production ponds remediation.