Business and Significant Accounting Policies - Additional Information (Detail) $ in Millions		3 Months Ended	12 Months Ended
	Mar. 31, 2015 VEF / $	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($) Segment	Dec. 31, 2014 USD ($) VEF / $	Dec. 31, 2013 USD ($)
Description Of Business And Significant Accounting Policies [Line Items]
Operating business segments | Segment			3
Stock-based compensation (income)/expense			$ 131.3	$ 49.7	$ 95.8
Interest income			2.6	7.2	6.0
Foreign currency transaction gains/(losses)			(0.4)	(2.0)	(6.4)
Foreign exchange-related charges					29.0
Advertising cost			$ 187.0	$ 189.0	$ 172.0
Customer Concentration Risk | Sales Revenue, Net
Description Of Business And Significant Accounting Policies [Line Items]
Concentrations of credit risk, percentage of sales to single customer			15.00%	15.00%	17.00%
Selling, general and administrative expenses
Description Of Business And Significant Accounting Policies [Line Items]
Stock-based compensation (income)/expense			$ 131.0	$ 49.7	$ 95.8
Venezuela
Description Of Business And Significant Accounting Policies [Line Items]
Venezuela-related charges			$ 60.6	174.6	$ 29.0
Foreign exchange-related charges		$ 13.0		$ 151.0
Impairment charge on non-monetary assets		37.3
Venezuela | SIMADI
Description Of Business And Significant Accounting Policies [Line Items]
Foreign currency exchange rate | VEF / $	193
Venezuela | Official Rate
Description Of Business And Significant Accounting Policies [Line Items]
Foreign currency exchange rate | VEF / $				6.30
Venezuela | SICAD-II
Description Of Business And Significant Accounting Policies [Line Items]
Foreign currency exchange rate | VEF / $				50.0
Venezuela | Selling, general and administrative expenses
Description Of Business And Significant Accounting Policies [Line Items]
Venezuela-related charges		$ 60.6