Business Developments and Risks and Uncertainties (Schedule of Results of Operations from Discontinued Operation) (Detail) - USD ($) $ in Millions	5 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues
Revenues	$ 58
Cost of sales	29
Total revenues from discontinued operations	29
Expenses
Operating	28
Interest	1
Loss on disposal group held for sale	54
Total expenses from discontinued operations	83
Income (loss) before income taxes from discontinued operations	(54)
Provision (benefit) for income taxes from discontinued operations	0
Net income (loss) from discontinued operations, net of income taxes	$ (54)	$ (54)	$ 0	$ 0