Financing Receivables (Allowance for Loan Losses) (Details)	3 Months Ended	6 Months Ended
Jun. 30, 2015 USD ($) item	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) item	Jun. 30, 2014 USD ($)	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)	(2,000,000)
Provisions			1,000,000
Ending balance	$ 34,000,000	33,000,000	34,000,000	33,000,000
Individually evaluated for impairment	6,000,000	9,000,000	6,000,000	9,000,000
Collectively evaluated for impairment	28,000,000	24,000,000	28,000,000	24,000,000
Recorded investment in financing receivables by impairment method and type of loan
Individually evaluated for impairment	42,000,000		42,000,000		$ 42,000,000
Collectively evaluated for impairment	3,880,000,000		3,880,000,000		3,951,000,000
Total	3,922,000,000		3,922,000,000		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	28,000,000	25,000,000	41,000,000	90,000,000
Loans sold	1,000,000	$ 6,000,000	7,000,000	$ 10,000,000
Nonperforming loans	10,000,000		10,000,000		12,000,000
Commitments to lend additional funds to borrowers for restructured loans	0		0
Residential and Consumer Portfolio Segment [Member]
Recorded investment in financing receivables by impairment method and type of loan
Total	$ 690,000,000		$ 690,000,000		$ 753,000,000
Percentage of residential mortgage loans below specific FICO score	6.00%		6.00%		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]
Recorded investment in financing receivables by impairment method and type of loan
Total	$ 497,000,000		$ 497,000,000		$ 511,000,000
Nonperforming loans	$ 5,000,000		$ 5,000,000		$ 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.

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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.

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- Definition

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

+ References

No definition available.

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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

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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

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- Definition

Financing receivables that are equal to or greater than 90 days past due.

+ 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=35738203&loc=SL6953401-111524

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- Definition

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

+ References

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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=35738203&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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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 10

-Subparagraph 3

-Article 9

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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)

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-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

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 11

-Article 9

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