Income Taxes - Income Source (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Taxes
Domestic	$ 2,878	$ 2,779	$ 2,211
Foreign	143	139	138
Income before income taxes	$ 3,021	$ 2,918	$ 2,349