Business Developments and Risks and Uncertainties (Schedule of Results of Operations from Discontinued Operation) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues
Revenues	$ 24	$ 32
Cost of sales	11	17
Total revenues from discontinued operations	13	15
Expenses:
Operating	13	20
Interest	1	1
Increase (decrease) on loss on disposal group	(2)	(3)
Total expenses from discontinued operations	12	18
Income (loss) before income taxes from discontinued operations	1	(3)
Provision (benefit) for income taxes from discontinued operations	0	0
Income (loss) from discontinued operations, net of income taxes	$ 1	$ (3)