Employer Sponsored Benefit Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2014 Pension Plan, Defined Benefit [Member] Scenario, Forecast [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Non-cash pre-tax loss in net periodic pension benefit expense					$ 4.9
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year			4.2
Contributions made for domestic pension plan	$ 0.4	$ 0.5	$ 3.4	$ 0.6