Debt - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended			3 Months Ended	9 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Long-term Debt	Sep. 30, 2014 Foreign Exchange Contracts	Sep. 30, 2014 Foreign Exchange Contracts	Sep. 30, 2014 Notes Payable Due 2024	Sep. 30, 2014 Northwind Holdings LLC	Sep. 30, 2013 Tailwind Holdings LLC
Debt Narrative Detail Information
Long-term Line of Credit	$ 0
Proceeds from Issuance of Long-term Debt	350.0
Interest Rate on Debt						4.00%
Debt Principal Payments							35.2
Repayments of Long-term Debt	180.2	101.2						62.5
Gain on Extinguishment of Debt								4.0
Extinguishment of Debt
Amount of Debt Extinguishment			145.0
Interest Rate on Extinguished Debt			6.85%
Cost Related to Early Retirement of Debt	13.2	0
Repayment of Long-term Debt, Including Cost of Make-whole Call Premium	158.2
Before Tax Reclassification from AOCI on Derivatives Instruments				$ 13.1	$ 13.1