Employee Benefits - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Contribution to the plans			$ 3,100,000
Cost of goods sold	$ 506,882,000	$ 492,542,000	1,553,300,000	$ 1,427,630,000
Research and development expenses	75,302,000	73,762,000	228,545,000	218,649,000
Selling and administrative expenses	157,796,000	145,652,000	457,847,000	428,675,000
Increase in operating expenses	6,700,000	8,700,000	20,000,000	(23,600,000)
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			12,700,000
Benefit payments			3,300,000
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		1,700,000		4,800,000
Research and development expenses		2,800,000		7,700,000
Selling and administrative expenses		$ 4,200,000		$ 11,000,000