Property, Plant and Equipment - Components of Property, Plant and Equipment (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Property Plant And Equipment [Abstract]
Land	$ 116.6	$ 112.1
Buildings	1,241.2	1,214.8
Machinery and equipment	6,198.7	6,142.8
Property, plant and equipment, gross	7,556.5	7,469.7
Less: Accumulated depreciation	(5,981.3)	(5,954.2)
Total	$ 1,575.2	$ 1,515.5