Income Taxes Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Deferred Tax Assets and Liabilities [Line Items]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Provision for Loan Losses	$ 639	$ 651
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	275	297
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	170	192
Deferred Tax Assets, Other Comprehensive Loss	472	257
Deferred Tax Assets, Other	70	97
Deferred Tax Assets, Gross	1,626	1,494
Deferred Tax Assets, Valuation Allowance	(80)	(79)
Deferred Tax Assets, Net	1,546	1,415
Deferred Tax Liabilities, Leasing Arrangements	659	707
Deferred Tax Liabilities, Compensation and Benefits	179	140
Deferred Tax Liabilities, Mortgage Servicing Rights	370	372
Deferred Tax Liabilities Loans	142	109
Deferred Tax Liabilities, Goodwill and Intangible Assets	233	216
Deferred Tax Liabilities, Property, Plant and Equipment	113	131
Deferred Tax Liabilities, Other	82	65
Deferred Tax Liabilities, Gross	1,778	1,740
Deferred Tax Liabilities, Net	$ (232)	$ (325)