Income Taxes - Summary of Components of Income Before Income Tax (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income before income taxes:
United States	$ 380	$ 332	$ 424
International	13	6	6
Consolidated GAAP income before income taxes	$ 393	$ 338	$ 430

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details