Significant Accounting Policies - Additional Information (Detail) - USD ($)		12 Months Ended
	Jan. 01, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2019
Business And Significant Accounting Policies [Line Items]
Expenses incurred related to shipping and handling of products		$ 2,271,900,000	$ 2,132,900,000	$ 2,381,800,000
Employees dedication percentage for dedicated project personnel expenses		100.00%
Allowance for doubtful accounts		$ 65,700,000	60,200,000
Retained Earnings [Member] | ASU 2018-02 [Member]
Business And Significant Accounting Policies [Line Items]
Reclassification from AOCI to retained earnings	$ 42,900,000
Minimum [Member]
Business And Significant Accounting Policies [Line Items]
Useful life of finite lived intangibles		1 year
Minimum [Member] | ASU 2016-02 [Member] | Subsequent Event [Member]
Business And Significant Accounting Policies [Line Items]
Lease, expected right-of-use asset					$ 265,000,000
Expected lease liability					265,000,000
Maximum [Member]
Business And Significant Accounting Policies [Line Items]
Useful life of finite lived intangibles		20 years
Maximum [Member] | ASU 2016-02 [Member] | Subsequent Event [Member]
Business And Significant Accounting Policies [Line Items]
Lease, expected right-of-use asset					295,000,000
Expected lease liability					$ 295,000,000
Building and Building Improvements [Member] | Minimum [Member]
Business And Significant Accounting Policies [Line Items]
Average estimated useful life		10 years
Building and Building Improvements [Member] | Maximum [Member]
Business And Significant Accounting Policies [Line Items]
Average estimated useful life		40 years
Machinery and Equipment [Member] | Minimum [Member]
Business And Significant Accounting Policies [Line Items]
Average estimated useful life		3 years
Machinery and Equipment [Member] | Maximum [Member]
Business And Significant Accounting Policies [Line Items]
Average estimated useful life		8 years
Capitalized Software Costs [Member] | Minimum [Member]
Business And Significant Accounting Policies [Line Items]
Average estimated useful life		3 years
Capitalized Software Costs [Member] | Maximum [Member]
Business And Significant Accounting Policies [Line Items]
Average estimated useful life		15 years
Instruments [Member]
Business And Significant Accounting Policies [Line Items]
Average estimated useful life		5 years
Shipping and Handling [Member]
Business And Significant Accounting Policies [Line Items]
Expenses incurred related to shipping and handling of products		$ 290,200,000	$ 263,600,000	$ 231,700,000