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	Dec. 31, 2015
Income Taxes Disclosure [Line Items]
Corporate tax rate				35.00%	35.00%	35.00%
Effective tax rate on GILTI				(0.80%)	0.60%	(0.30%)
Income tax benefit related to 2017 Tax Act	$ 1,272.4
Income tax expense repatriation of foreign earnings	715.0
Benefit from removal of deferred tax liability	1,181.0
Offsets for toll charge recognized	$ 466.0
Payment of toll charge liability period	8 years
Current income tax liabilities	$ 82.0			$ 82.0
Non-current income tax liabilities	384.0			384.0
Remeasurement of deferred tax assets and liabilities	557.4
Provisional income tax benefit	1,738.4
Net operating loss carryovers expire with in the period	107.4			107.4
Net operating loss carryovers with indefinite life	57.7			57.7
Valuation allowances for net operating loss carryovers	105.0			105.0	$ 70.8
Deferred tax assets, tax credit carryovers subject to expiration	163.7			163.7
Tax credit carryovers with indefinite life	0.1			0.1
Valuation allowances for certain tax credit carryovers	18.5			18.5	11.9
Capital loss carryovers	2.7			2.7
Capital loss carryovers with indefinite life	4.2			4.2
Valuation allowances for net Capital loss carryovers				5.5	0.2
Valuation allowances for potential capital losses	11.6			11.6	5.4
Deferred tax liability of unremitted foreign earning					1,159.4
Unrecognized tax benefits income tax penalties and interest expense recognized				38.3	19.3	$ 4.8
Recognized liability for interest and penalties	75.7			75.7	110.8	82.9
Decrease in unrecognized tax benefits within the next twelve months	115.0			115.0
Increase in unrecognized tax benefits within the next twelve months	$ 25.0			$ 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	$ 29.8
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				$ 3,600.0
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				19 years
Maturity period for net Capital loss carryovers				4 years
Foreign jurisdictions statutes of limitation period				5 years
Scenario, Forecast [Member]
Income Taxes Disclosure [Line Items]
Corporate tax rate			21.00%
Effective tax rate on GILTI		13.125%	10.50%
Dividend received deduction on qualified foreign subsidiaries			100.00%