Restructuring, Impairment and Other Charges - Other Charges - Narrative (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Restructuring Cost And Reserve [Line Items]
Other Charges	$ 9.7	$ 4.7	$ 34.0	$ 4.7
Accrued liabilities	862.4		862.4		814.8
Other Noncurrent Liabilities	449.9		449.9		349.5
Multi-employer pension plan withdrawal obligations
Restructuring Cost And Reserve [Line Items]
Other Charges	9.7		34.0
Accrued liabilities	8.9		8.9
Other Noncurrent Liabilities	$ 95.5		$ 95.5