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Business Developments and Risks and Uncertainties (Schedule of Results of Operations from Discontinued Operation) (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Revenues |  |
Revenues | $ 3 | $ 24
Cost of sales | 1 | 11
Total revenues from discontinued operations | 2 | 13
Expenses: |  |
Operating | 1 | 13
Interest | 0 | 1
Increase (decrease) on loss on disposal group | 1 | (2)
Total expenses from discontinued operations | 2 | 12
Income (loss) before income taxes from discontinued operations | 0 | 1
Provision (benefit) for income taxes from discontinued operations | 0 | 0
Income (loss) from discontinued operations, net of income taxes | $ 0 | $ 1

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