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Commitments and Contingencies (Policies)
12 Months Ended
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingencies: Policy [Policy Text Block]
On a quarterly basis, we review relevant information about all pending legal actions and proceedings for the purpose of evaluating and revising our contingencies, accruals and disclosures.
We establish an accrual for matters when a loss is probable and we can reasonably estimate the amount of such loss.
For legal actions or proceedings where there is only a reasonable possibility that a loss may be incurred, or where we are not currently able to estimate the reasonably possible loss or range of loss, we do not establish an accrual.
Loan and Mortgage Related Securities Commitments: Policy [Policy Text Block]
We have unconditional commitments related to the purchase of loans and mortgage-related securities. These include both on- and off-balance sheet commitments. A portion of these have been recorded as derivatives in our consolidated balance sheets.