Income Tax Provision - Deferred Tax Liabilities and Assets (Details) - USD ($) $ in Millions	Mar. 31, 2017	Mar. 31, 2016
Liabilities:
Lease transactions	$ 7,647	$ 8,579
State taxes, net of federal tax benefit	640	642
Mark-to-market of investments in marketable securities and derivatives	267	316
Other	383	344
Deferred tax liabilities	8,937	9,881
Assets:
Provision for credit and residual value losses	593	431
Deferred costs and fees	306	292
Net operating loss and tax credit carryforwards	67	1,097
Other	66	67
Deferred tax assets	1,032	1,887
Valuation allowance	(21)	(22)
Net deferred tax assets	1,011	1,865
Net deferred income tax liability	$ 7,926	$ 8,016

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.