Employee Benefits - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
Amount paid in severance benefits over the period	$ 86		$ 226
Pre-tax severance changes	241		249
Post employment benefits liability	623		623
Pension
Defined Benefit Plan Disclosure [Line Items]
Employer discretionary contribution amount	200		200
Remeasurement gain (loss), net	$ 0	$ (198)	$ 0	$ (198)
Charge due to difference between estimated and actual return on assets		654		654
Credit due to change in discount rate assumption		$ 456		$ 456