Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies Disclosure [Line Items]
Environmental activities expenditures	$ 2.3	$ 1.7	$ 1.2
Standby letters of credit	20.6
Inventory
Commitments and Contingencies Disclosure [Line Items]
Commitments due in 2014	175.6
Commitments due in 2015	132.7
Commitments due in 2016	7.6
Commitments due thereafter
Financial Services
Commitments and Contingencies Disclosure [Line Items]
Outstanding commitments to fund new loan and lease transactions	$ 407.4
Commitments expiration term	90 days