Tax Effects of Temporary Differences Representing Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Assets:
Accrued expenses	$ 183.9	$ 239.2
Net operating loss and tax credit carryforwards	102.1	84.4
Postretirement benefit plans		11.7
Allowance for losses on receivables	35.6	41.2
Goodwill and intangibles	34.4	1.3
Other	89.2	105.1
Deferred Tax Assets, Gross, Total	445.2	482.9
Valuation allowance	(118.6)	(64.5)
Deferred Tax Assets, Net of Valuation Allowance, Total	326.6	418.4
Liabilities:
Financial Services leasing depreciation	(608.2)	(808.7)
Depreciation and amortization	(165.1)	(246.1)
Postretirement benefit plans	(39.5)
Other	(28.8)	(35.3)
Deferred Tax Liability, Total	(841.6)	(1,090.1)
Net deferred tax liability	$ (515.0)	$ (671.7)