Reconciliation of Federal Statutory Tax Rate to Effective Income Tax Rate (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Examination [Line Items]
Statutory U.S. federal income tax rate	21.00%	21.00%	21.00%	21.00%
Swaps terminated prior to the TCJA	4.80%	3.20%	19.10%	3.90%
Effect of foreign operations	3.70%	2.30%	7.30%	2.70%
Non-deductible goodwill	1.20%	0.00%	2.70%	0.00%
Non-deductible expense	0.70%	0.60%	2.80%	0.70%
Tax favored investments	(0.80%)	(0.50%)	(3.20%)	(0.50%)
Stock-based compensation	0.10%	0.10%	2.90%	0.00%
Other, net	0.40%	2.80%	1.90%	1.50%
Effective rate	31.10%	29.50%	54.50%	29.30%