(Income) or Expense Recognized in Earnings Related to Fair Value Hedges (Detail) (Financial Services, USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Financial Services
Derivative [Line Items]
Interest and other borrowing expenses - interest-rate swaps	$ 0.6	$ 0.2	$ 0.1	$ 0.6
Interest and other borrowing expenses - term notes	$ (1.0)	$ (1.2)	$ (2.2)	$ (3.9)