Income Taxes - Reconciliation of Effective Tax Rate on Income or Loss and Statutory Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Statutory U.S. tax rate	35.00%	35.00%	35.00%
State income taxes, net of U.S. tax benefit	3.10%	3.50%	1.90%
Federal and State tax credits, net of U.S. tax benefit	(5.00%)	(11.50%)	(9.80%)
Foreign income taxed at other than U.S. statutory rate	1.80%	(2.40%)	(13.40%)
Effect of foreign rate changes	0.50%	0.90%	1.30%
Foreign tax credit	(11.30%)	(12.00%)	(13.50%)
Basis differences of intangibles with an indefinite life	0.10%	0.10%	0.10%
Change in deferred tax valuation allowance	(262.40%)	0.30%	35.30%
Accrual for interest and income taxes related to uncertain tax positions	2.90%	(0.30%)	(7.30%)
Income (loss) from flowthrough entities	(0.20%)	(2.00%)	(1.90%)
Meals and entertainment	1.50%	3.40%	3.30%
Group loss relief	(1.60%)	(3.70%)	(2.60%)
Stock option compensation	0.20%	(1.90%)	2.30%
Foreign dividends and earnings inclusion	9.90%	7.10%	(0.90%)
Foreign tax withholding	0.60%	1.40%	2.40%
Executive compensation limitation	0.70%	4.30%	0.00%
Other	(2.80%)	5.20%	(6.20%)
Effective tax rate	(227.00%)	27.40%	26.00%