Lease Commitments - Operating Leases Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities	$ 31	$ 28
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 15	$ 4
Weighted-average remaining lease term (years)	5 years 6 months	5 years 10 months 24 days
Weighted-average discount rate applied to operating leases (percent)	3.10%	3.60%