Other Income (Expense), Net (Components of Other Income (Expense), Net) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Other income		$ 8	$ 10	$ 11
Gains on sales of assets	[1]	32	42	0
Other expense		(16)	2	(18)
Allowance for equity funds used during construction		0	1	5
Other income (expense), net		$ 24	$ 55	$ (2)

[1] Includes amounts recognized in connection with the transfer of property, plant and equipment to satisfy litigation. See Note 12 for additional information.