Income Taxes Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets and Liabilities [Line Items]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Provision for Loan Losses	$ 651	$ 710
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	297	358
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	192	201
Deferred Tax Assets, Other Comprehensive Loss	257	56
Deferred Tax Assets, Other	97	127
Deferred Tax Assets, Gross	1,494	1,452
Deferred Tax Assets, Valuation Allowance	(79)	(98)
Deferred Tax Assets, Net	1,415	1,354
Deferred Tax Liabilities, Leasing Arrangements	707	762
Deferred Tax Liabilities, Compensation and Benefits	140	113
Deferred Tax Liabilities, Mortgage Servicing Rights	372	515
Deferred Tax Liabilities Loans	109	93
Deferred Tax Liabilities, Goodwill and Intangible Assets	216	190
Deferred Tax Liabilities, Property, Plant and Equipment	131	140
Deferred Tax Liabilities, Other	65	61
Deferred Tax Liabilities, Gross	1,740	1,874
Deferred Tax Liabilities, Net	$ (325)	$ (520)