Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2026	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes Disclosure [Line Items]
Provisional net tax benefit				$ 225.7	$ (108.2)	$ 1,348.8
Corporate tax rate				21.00%	21.00%	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
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	$ 391.6			$ 391.6
Net operating loss carryovers with indefinite life	122.8			122.8
Valuation allowances for net operating loss carryovers	493.4			493.4	348.9
Deferred tax assets, tax credit carryovers subject to expiration	33.8			33.8
Valuation allowances for certain tax credit carryovers	32.3			32.3	25.2
Capital loss carryovers	1.8			1.8
Capital loss carryovers with indefinite life	6.5			6.5
Valuation allowances for net capital loss carryovers				8.3	7.9
Valuation allowances for potential capital losses	12.1			12.1	8.9
Estimated of cash and repatriate of foreign entities				2,200.0
Unrecognized tax benefits income tax penalties and interest expense recognized				15.0	18.5	(38.3)
Recognized liability for interest and penalties	109.2			109.2	94.2	75.7
Decrease in unrecognized tax benefits within the next twelve months	290.0			290.0
Increase in unrecognized tax benefits within the next twelve months	30.0			$ 30.0
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					$ 0.0	$ 3.0
Minimum [Member]
Income Taxes Disclosure [Line Items]
Maturity period for net operating loss carryovers				1 year
Maturity period for tax credit carryovers				1 year
Maturity period for net capital loss carryovers				1 year
Income tax expense repatriation of E&P				$ 5,000.0
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
Maturity period for net capital loss carryovers				3 years
Foreign jurisdictions statutes of limitation period				5 years
Scenario, Forecast [Member]
Income Taxes Disclosure [Line Items]
Effective tax rate on GILTI			13.125%
Tax Reform and AHV Financing [Member]
Income Taxes Disclosure [Line Items]
Provisional net tax benefit	$ 51.2	$ 263.8