Deposit Liabilities (Schedule Of Deposit Liabilities) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Deposits [Abstract]
Noninterest-bearing deposit liabilities	$ 79,000,000	$ 64,000,000
Interest-bearing Deposit Liabilities, by Component [Abstract]
Deposits, Savings Deposits	29,718,000,000us-gaap_DepositsSavingsDeposits	26,769,000,000us-gaap_DepositsSavingsDeposits
Time Deposits	30,768,000,000us-gaap_TimeDeposits	31,070,000,000us-gaap_TimeDeposits
Deposits, Retail	310,000,000us-gaap_DepositsRetail	319,000,000us-gaap_DepositsRetail
Total deposit liabilities	60,875,000,000us-gaap_Deposits	58,222,000,000us-gaap_Deposits
Time Deposits, $100,000 or More	$ 12,800,000,000us-gaap_TimeDeposits100000OrMore	$ 13,000,000,000us-gaap_TimeDeposits100000OrMore

The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

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 210.9-03.12)

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

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 12

-Article 9

+ Details

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- Definition

The aggregate amount of all retail deposit accounts including demand accounts, savings accounts, and certificates of deposit.

+ References

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- Definition

Amount of interest bearing deposits with no stated maturity, which may include passbook and statement savings accounts and money-market deposit accounts (MMDAs).

+ References

+ Details

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- Definition

The aggregate amount of all domestic and foreign noninterest-bearing deposits liabilities held by the entity.

+ References

+ Details

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- Definition

Amount of deposits that cannot be withdrawn before a set date without penalty or for which notice of withdrawal is required. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.

+ References

+ Details

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- Definition

The aggregate amount of domestic and foreign time deposit liabilities (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $100,000 or more.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 405

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6479006&loc=d3e64164-112818

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

-Publisher SEC

-Name Industry Guide

-Number 3

-Section V

-Paragraph A

-Subparagraph 4

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