Financing Receivables (Allowance for Loan Losses) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Rollforward of the allowance for loan losses
Beginning balance			$ 28	$ 30
Charge-offs			(2)	0
Ending balance	26	30	26	30
Individually evaluated for impairment	8	7	8	7
Collectively evaluated for impairment	18	23	18	23
Recorded investment in financing receivables by impairment method and type of loan
Individually evaluated for impairment	37		37		45
Collectively evaluated for impairment	3,690		3,690		3,666
Total	3,727		3,727		3,711
Recorded investment in financing receivables individually evaluated for impairment with no related allowance for loan losses	9		9		12
Commercial Mortgage Loans
Rollforward of the allowance for loan losses
Beginning balance			24	26
Charge-offs			(1)	0
Ending balance	23	26	23	26
Individually evaluated for impairment	8	7	8	7
Collectively evaluated for impairment	15	19	15	19
Recorded investment in financing receivables by impairment method and type of loan
Individually evaluated for impairment	34		34		40
Collectively evaluated for impairment	2,560		2,560		2,524
Total	2,594		2,594		2,564
Residential Mortgage Loans
Recorded investment in financing receivables by impairment method and type of loan
Collectively evaluated for impairment	736		736		786
Total	736		736		786
Unamortized discount	43		43		53
Syndicated Loans
Rollforward of the allowance for loan losses
Beginning balance			4	4
Charge-offs			(1)	0
Ending balance	3	4	3	4
Collectively evaluated for impairment	3	4	3	4
Recorded investment in financing receivables by impairment method and type of loan
Individually evaluated for impairment	3		3		5
Collectively evaluated for impairment	394		394		356
Total	397		397		361
Total loans purchased	25	37	90	59
Loans sold	$ 6	$ 0	$ 10	$ 1

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

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-Publisher FASB

-Name Accounting Standards Codification

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

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

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

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

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

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

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

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

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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.

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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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