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Employee Benefit and Retirement Plans - Summary of Reconciliation of Change in Fair Value Measurement of Defined Benefit Plans' Consolidated Assets Using Significant Unobservable Inputs (Level 3) (Detail) - Level 3 - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Change in plan assets:
Fair value of plan assets at beginning of year	$ 194	$ 9
Unrealized losses		(101)
Purchases, sales, settlements and other, net	(184)	286
Fair value of plan assets at end of year	$ 10	$ 194

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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