Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Lessee Disclosure [Abstract]
Cash paid for operating leases	$ 322	$ 306
Right-of-use assets obtained in exchange for operating lease liabilities	$ 325	$ 328
Weighted average remaining lease term in years	4 years	4 years
Weighted average discount rate	2.10%	2.60%