Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 Facility	Dec. 31, 2012	Dec. 31, 2011
Commitment And Contingencies [Line Items]
Authorized expenditures on incomplete projects for purchase of property, plant and equipment	$ 76.2
Committed total of property, plant and equipment expenditure	37.8
Severance payments related to restructuring	19.7
Purchase commitment for outsourced services	96.1
Commitment to purchase natural gas	8.0
Operating lease commitments	450.1
Rent expense	149.4	143.7	152.7
Minimum non-cancelable sublease rentals aggregating	$ 41.1
Number of sites cited as potentially responsible party	11
Number of previously and currently owned sites with potential remediation obligations	10