Federal, State and Local Taxes - Changes in Liability for Unrecognized Gross Tax Benefits (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Uncertain tax positions at beginning of year	$ 39	$ 38	$ 36
Additions for tax positions relating to current-year operations	1	2	1
Additions for tax positions relating to prior tax years		1	1
Subtractions for tax positions relating to prior tax years		(2)
Uncertain tax positions at end of year	$ 40	$ 39	$ 38