Revenue Recognition - Schedule of Net Sales by Geography (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Sales Information [Line Items]
Net Sales	$ 2,017.6	$ 1,972.4
Americas [Member]
Sales Information [Line Items]
Net Sales	1,208.1	1,229.9
EMEA [Member]
Sales Information [Line Items]
Net Sales	496.5	453.2
Asia Pacific [Member]
Sales Information [Line Items]
Net Sales	$ 313.0	$ 289.3