Income Tax Provision - Deferred Tax Liabilities and Assets (Details) - USD ($) $ in Millions	Mar. 31, 2016	Mar. 31, 2015
Liabilities:
Lease transactions	$ 8,579	$ 8,576
State taxes	642	570
Mark-to-market of investments in marketable securities and derivatives	316	292
Other	344	329
Deferred tax liabilities	9,881	9,767
Assets:
Provision for credit and residual value losses	431	328
Deferred costs and fees	292	258
Net operating loss and tax credit carryforwards	1,097	1,615
Other	67	67
Deferred tax assets	1,887	2,268
Valuation allowance	(22)	(20)
Net deferred tax assets	1,865	2,248
Net deferred income tax liability	$ 8,016	$ 7,519

The sum of the tax effects as of the balance sheet date of the amount of excesses of tax deductions over gross income in a year which cannot be used on the tax returns in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset. And the The tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused tax credit carryforwards which have been reduced by a valuation allowance.

No definition available.