Income Taxes (Income before Income Taxes) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income (loss) from continuing operations before income taxes	$ (484)	$ (148)	$ (445)
Domestic [Member]
Income (loss) from continuing operations before income taxes	(484)	(148)	(445)
Foreign [Member]
Income (loss) from continuing operations before income taxes	$ 0	$ 0	$ 0