Employee Benefits - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Contribution to the plans	$ 1,500,000		$ 2,400,000
Other income, net	20,655,000	$ 7,909,000	21,232,000	$ 29,140,000
Cost of goods sold	521,299,000	469,877,000	1,046,419,000	935,088,000
Research and development expenses	74,767,000	72,761,000	153,244,000	144,887,000
Selling and administrative expenses	157,407,000	139,319,000	300,051,000	283,023,000
Increase in operating expenses	(6,700,000)	(7,400,000)	(13,300,000)	(14,900,000)
Defined Contribution and Other Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to the plan			5,000,000
U.S. Plans | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution to the plans			0
U.S. Plans | Minimum | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to the plan	4,100,000		4,100,000
Non-U.S. Plans | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution to the plans			7,800,000
Benefit payments			2,200,000
Non-U.S. Plans | Minimum | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to the plan	$ 17,100,000		$ 17,100,000
Accounting Standards Update 2017-07 [Member]
Defined Benefit Plan Disclosure [Line Items]
Cost of goods sold		1,600,000		3,200,000
Research and development expenses		2,400,000		4,900,000
Selling and administrative expenses		$ 3,400,000		$ 6,800,000