Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2026	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes Disclosure [Line Items]
Corporate tax rate			21.00%	35.00%	35.00%
Effective tax rate on GILTI			10.50%
Dividend received deduction on qualified foreign subsidiaries			100.00%
Income tax benefit related to 2017 Tax Act	$ 1,272.4			$ 1,272.4
Additional income tax expense			$ 8.3
Transition income tax provision			11.3
Income tax benefit related to remeasurement of deferred tax assets and liabilities			3.0
Net operating loss carryovers expire with in the period			240.3
Net operating loss carryovers with indefinite life			134.0
Valuation allowances for net operating loss carryovers	105.0		348.9	105.0
Deferred tax assets, tax credit carryovers subject to expiration			29.2
Valuation allowances for certain tax credit carryovers	18.5		$ 25.2	18.5
Capital loss carryovers	1.5			1.5
Maturity period for net Capital loss carryovers			1 year
Capital loss carryovers with indefinite life			$ 6.4
Valuation allowances for net Capital loss carryovers			7.9	5.5
Valuation allowances for potential capital losses	11.6		8.9	11.6
Estimated of cash and repatriate of foreign entities			2,600.0
Unrecognized tax benefits income tax penalties and interest expense recognized			18.5	(38.3)	$ 19.3
Recognized liability for interest and penalties	$ 75.7		94.2	75.7	110.8
Decrease in unrecognized tax benefits within the next twelve months			125.0
Increase in unrecognized tax benefits within the next twelve months			$ 25.0
State examination period after notification			Up to one year
Biomet [Member]
Income Taxes Disclosure [Line Items]
Unrecognized tax benefits income tax penalties and interest expense increase related to Biomet merger				$ 3.0	$ 8.6
Minimum [Member]
Income Taxes Disclosure [Line Items]
Maturity period for net operating loss carryovers			1 year
Maturity period for tax credit carryovers			2 years
Income tax expense repatriation of E&P			$ 5,100.0
Foreign jurisdictions statutes of limitation period			3 years
Maximum [Member]
Income Taxes Disclosure [Line Items]
Maturity period for net operating loss carryovers			20 years
Maturity period for tax credit carryovers			16 years
Addtional tax related to remittingthe earnings			$ 5,100.0
Foreign jurisdictions statutes of limitation period			5 years
Scenario, Forecast [Member]
Income Taxes Disclosure [Line Items]
Effective tax rate on GILTI		13.125%