Bank Loans and Related Allowance for Loan Losses (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Loans Receivable [Line Items]
Commitments to extend credit related to unused HELOCs, PALs, and other lines of credit	$ 7,400	$ 6,700
Commitments to purchase First Mortgage loans	37	24
Pipeline of First Mortgages in process	223	202
Loans accruing interest contractually 90 days or more past due	0	0
Nonperforming assets, including nonaccrual loans and other real estate owned	36	44
Impaired assets, which include nonperforming assets and troubled debt restructurings	50	61
First Mortgage [Member]
Loans Receivable [Line Items]
Purchased first mortgages and HELOCs	2,000	1,400
Home equity loans and lines of credit [Member]
Loans Receivable [Line Items]
Purchased first mortgages and HELOCs	573	664
First Mortgage and Home Equity Loans and Lines of Credit [Member]
Loans Receivable [Line Items]
Unamortized premiums and discounts and direct origination costs	$ 80	$ 80
First Mortgage and Home Equity Loans and Lines of Credit [Member] \| Geographic Concentration Risk [Member] \| California [Member] \| Loans, Geographic Area [Member]
Loans Receivable [Line Items]
Concentration risk percentage	48.00%	48.00%

Total nonperforming assets include nonaccrual loans and other real estate owned

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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-Publisher FASB
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Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

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Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

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- Definition

Reflects the amount of cash required to fully fund agreements to provide advances to borrowers and lessees at stated interest rates.

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Amount of undisbursed portion of the loan receivable balance (loans in process). Excludes loans and leases covered under loss sharing agreements.

+ References

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The cash outflow from (a) purchases of loans held-for-investment, (b) purchases of leases held-for-investment, and (c) both.

+ References

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Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements.

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Unused amount of commitments to extend credit to customers.

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