Financing Receivables (Allowance for Loan Losses) (Details)	3 Months Ended	9 Months Ended
Sep. 30, 2015 USD ($) item	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) item	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($) item
Rollforward of the allowance for loan losses
Beginning balance			$ 35,000,000	$ 37,000,000
Charge-offs		$ (4,000,000)	(3,000,000)
Provisions		2,000,000	1,000,000
Ending balance	$ 33,000,000	35,000,000	33,000,000	35,000,000
Individually evaluated for impairment	6,000,000	9,000,000	6,000,000	9,000,000
Collectively evaluated for impairment	27,000,000	26,000,000	27,000,000	26,000,000
Credit quality information [Line Items]
Individually evaluated for impairment	39,000,000		39,000,000		$ 42,000,000
Collectively evaluated for impairment	3,923,000,000		3,923,000,000		3,951,000,000
Total	3,962,000,000		3,962,000,000		3,993,000,000
Recorded investment in financing receivables individually evaluated for impairment with no related allowance for loan losses	20,000,000		20,000,000		13,000,000
Loans purchased	93,000,000	96,000,000	134,000,000	186,000,000
Loans sold	9,000,000	$ 1,000,000	16,000,000	$ 11,000,000
Commitments to lend additional funds to borrowers for restructured loans	0		0
90 days or more past due
Credit quality information [Line Items]
Nonperforming loans	10,000,000		10,000,000		12,000,000
Residential and Consumer Portfolio Segment [Member]
Credit quality information [Line Items]
Total	$ 660,000,000		$ 660,000,000		$ 753,000,000
Percentage of residential mortgage loans below specific FICO score	4.00%		4.00%		6.00%
FICO score \| item	640		640		640
Percentage of residential mortgage loans above specific LTV ratio	2.00%		2.00%		2.00%
LTV ratio	90.00%		90.00%		90.00%
Percentage of loan portfolio represented by state of California	37.00%		37.00%		37.00%
Syndicated loans [Member]
Credit quality information [Line Items]
Total	$ 545,000,000		$ 545,000,000		$ 511,000,000
Syndicated loans [Member] \| 90 days or more past due
Credit quality information [Line Items]
Nonperforming loans	$ 6,000,000		$ 6,000,000		$ 4,000,000

Represents the percentage of total loan portfolio represented by California State.

No definition available.

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- Definition

Represents the percentage of residential mortgage loans which are above specified Loan-To-Value ratios.

+ References

No definition available.

+ Details

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- Definition

Represents the percentage of residential mortgage loans which are below specified FICO score.

+ References

No definition available.

+ Details

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- Definition

Represents the maximum specified FICO score used for analysis of credit worthiness of borrowers.

+ References

No definition available.

+ Details

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- Definition

Represents the minimum specified Loan-To-Value ratio used for analysis of collateral characteristics.

+ References

No definition available.

+ Details

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- References

No definition available.

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

+ Details

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- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

+ Details

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- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of direct write-downs of financing receivables charged against the allowance.

+ References

+ Details

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- Definition

The balance of financing receivables that were collectively evaluated for impairment.

+ References

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- Definition

The balance of financing receivables that were individually evaluated for impairment.

+ References

+ Details

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- Definition

Recorded Investment in financing receivables that are past due at the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7A

-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953401-111524

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- Definition

The amount of any significant purchases of financing receivables during the reporting period.

+ References

+ Details

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- Definition

The amount of any significant sales of financing receivables during the reporting period.

+ References

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- Definition

Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953550-111524

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- Definition

Reflects the unfunded portion of contractual agreements to lend funds to borrowers for loans whose terms have been modified by troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18794-111554

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- Definition

Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.10(3))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.11)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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