Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions		12 Months Ended
	Jul. 13, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business And Significant Accounting Policies [Line Items]
Percentage of sales through direct channel		75.00%
Percentage of sales through indirect channel		25.00%
Period terms for payment		90 days
Expenses incurred related to shipping and handling of products		$ 263.6	$ 231.7	$ 214.2
Fair value of merger consideration transferred, classified as compensation expense				90.4
Merger retention plans, expenses recognized				73.0
Employees dedication percentage for dedicated project personnel expenses		100.00%
Intangible asset impairment		$ 26.8	30.0
Allowance for doubtful accounts		60.2	51.6
Provision (benefit) for income taxes		(1,348.8)	95.0	7.0
ASU 2016-16 [Member]
Business And Significant Accounting Policies [Line Items]
Provision (benefit) for income taxes		(5.9)
Retained Earnings [Member] | ASU 2016-16 [Member]
Business And Significant Accounting Policies [Line Items]
Cumulative effect of new accounting principle adoption		(77.8)
Prepaid Expenses and Other Current Assets [Member] | ASU 2016-16 [Member]
Business And Significant Accounting Policies [Line Items]
Cumulative effect of new accounting principle adoption		3.9
Other Assets [Member] | ASU 2016-16 [Member]
Business And Significant Accounting Policies [Line Items]
Cumulative effect of new accounting principle adoption		22.4
Income Taxes Payable [Member] | ASU 2016-16 [Member]
Business And Significant Accounting Policies [Line Items]
Cumulative effect of new accounting principle adoption		(2.0)
Deferred Income Taxes [Member] | ASU 2016-16 [Member]
Business And Significant Accounting Policies [Line Items]
Cumulative effect of new accounting principle adoption		$ 53.5
Minimum [Member]
Business And Significant Accounting Policies [Line Items]
Useful life of finite lived intangibles		1 year
Maximum [Member]
Business And Significant Accounting Policies [Line Items]
Useful life of finite lived intangibles		20 years
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
In Process Research and Development (IPR&D) [Member]
Business And Significant Accounting Policies [Line Items]
Intangible assets		$ 209.0
Intangible asset impairment		18.8	30.0
Trademarks [Member]
Business And Significant Accounting Policies [Line Items]
Intangible assets		479.0
Intangible asset impairment		8.0
Employee Severance [Member]
Business And Significant Accounting Policies [Line Items]
Restructuring Cost		170.0
Cumulative restructuring cost		163.9
Contract Terminations [Member]
Business And Significant Accounting Policies [Line Items]
Restructuring Cost		140.0
Cumulative restructuring cost		$ 140.1
LDR Holding Corporation [Member]
Business And Significant Accounting Policies [Line Items]
Fair value of merger consideration transferred, classified as compensation expense	$ 24.1		$ 24.1
LDR Holding Corporation [Member] | In Process Research and Development (IPR&D) [Member]
Business And Significant Accounting Policies [Line Items]
Intangible assets	$ 2.0
Biomet [Member]
Business And Significant Accounting Policies [Line Items]
Merger retention plans, expenses recognized				$ 73.0