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Employee Benefit Plans (Change in Fair Value of Plan Assets) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Compensation And Retirement Disclosure [Abstract]
Beginning balance	$ 768	$ 747
Actual return (loss) on plan assets	(161)	62
Benefits paid	(46)	(41)
Ending balance	$ 561	$ 768

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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