INCOME TAXES - Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Other comprehensive income	$ 241	$ 232
Allowance for credit losses	465	456
Net operating loss carryforwards	137	155
Accrued expenses not currently deductible	135	170
Deferred income	40	45
Fair value marks	36	34
Other	5	1
Total deferred tax assets	1,059	1,093
Valuation allowance	(123)	(157)
Deferred tax assets, net of valuation allowance	936	936
Deferred tax liabilities:
Leasing transactions	882	825
Amortization of intangibles	455	380
Depreciation	213	164
Pension and other employee compensation plans	69	14
MSRs	47	46
Total deferred tax liabilities	1,666	1,429
Net deferred tax liability	$ 730	$ 493