Property, Plant and Equipment - Components of Property, Plant and Equipment (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Property Plant And Equipment [Abstract]
Land	$ 116.0	$ 94.3
Buildings	1,222.7	1,160.6
Machinery and equipment	6,182.5	6,024.0
Property, plant and equipment, gross	7,521.2	7,278.9
Accumulated depreciation	(5,941.3)	(5,848.8)
Total	$ 1,579.9	$ 1,430.1