Income Taxes - Factors Effecting Effective Tax Rate from U.S. Federal Statutory Rate (Detail)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Statutory rate	21.00%	21.00%	21.00%
Foreign income inclusions	2.10%	3.30%	1.70%
Foreign tax rate differential	0.90%	0.90%	1.00%
Tax charge/(credit) from previous years	(2.60%)	0.20%	0.60%
Net charge/(credit) from unrecognized tax benefits	0.70%	(1.40%)	0.40%
Foreign currency transactions	(1.40%)	3.50%	0.10%
Tax on unremitted earnings	1.40%	0.30%	0.10%
Change in U.K. statutory tax rate	0.00%	0.00%	5.40%
State and local taxes	1.00%	2.20%	1.30%
US incentive for foreign derived intangible income	(2.80%)	(2.70%)	(1.50%)
Innovation incentives	(1.30%)	(0.80%)	(1.10%)
Non-deductible officer compensation	1.00%	1.40%	0.20%
Tax on closure of legacy operations	0.00%	0.00%	1.60%
Other items and adjustments, net	0.20%	0.10%	(0.10%)
Effective Income Tax Rate	20.20%	28.00%	30.70%