Tax Effects of Temporary Differences Representing Deferred Tax Assets and Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Assets:
Accrued expenses	$ 215.9	$ 188.4
Net operating loss and tax credit carryforwards	67.2	78.2
Postretirement benefit plans	43.3
Allowance for losses on receivables	43.0	47.0
Other	112.1	88.4
Deferred Tax Assets, Gross, Total	481.5	402.0
Valuation allowance	(30.3)	(43.9)
Deferred Tax Assets Net	451.2	358.1
Liabilities:
Financial Services leasing depreciation	(817.2)	(851.8)
Depreciation and amortization	(289.2)	(296.1)
Postretirement benefit plans		(51.3)
Other	(33.5)	(5.4)
Deferred Tax Liability, Total	(1,139.9)	(1,204.6)
Net deferred tax liability	$ (688.7)	$ (846.5)