Pension and Other Postretirement Benefits - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Increase trend rate by 1%, increase the benefit expenses	$ 4.3
Increase trend rate by 1%, increase the benefit obligation	0.3
Decrease trend rate by 1%, decrease the benefit expenses	3.7
Decrease trend rate by 1%, decrease the benefit obligation	0.2
Defined benefit plans, annual average Medicare part D subsidy	0.2
Defined contribution plans, costs	12.1	10.1	10.2
Equity Securities
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Target allocation percentage of securities	45.00%
Fixed Income Securities
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Target allocation percentage of securities	35.00%
Other Securities
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Target allocation percentage of securities	20.00%
United States Pension Plans of US Entity, Defined Benefit
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	5.09%
United States Postretirement Benefit Plans of US Entity, Defined Benefit
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	4.70%
U.S. And Foreign Defined Benefit Pension Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated benefit obligation	367.3	396.7
Expected employer contribution for year 2011	9.4
Postretirement Health Care Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected employer contribution for year 2011	$ 3.4