Business Developments and Risks and Uncertainties (Schedule of Results of Operations from Discontinued Operation) (Detail) - USD ($) $ in Millions	2 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues
Revenues	$ 23
Cost of sales	11
Total revenues from discontinued operations	12
Expenses
Operating	11
Total expenses from discontinued operations	11
Income (loss) before income taxes from discontinued operations	1
Provision (benefit) for income taxes from discontinued operations	0
Net income (loss) from discontinued operations	$ 1	$ 1	$ 0	$ 1	$ 0