Financing Receivables (Allowance for Loan Losses) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Rollforward of the allowance for loan losses
Beginning balance			$ 37	$ 44
Charge-offs			(4)	(6)
Provisions			2
Recoveries				1
Ending balance	35	39	35	39
Individually evaluated for impairment	9	7	9	7
Collectively evaluated for impairment	26	32	26	32
Recorded investment in financing receivables by impairment method and type of loan
Individually evaluated for impairment	48		48		58
Collectively evaluated for impairment	3,947		3,947		3,883
Total	3,995		3,995		3,941
Recorded investment in financing receivables individually evaluated for impairment with no related allowance for loan losses	17		17		21
Commercial mortgage loans [Member]
Rollforward of the allowance for loan losses
Beginning balance			26	29
Charge-offs			(1)	(3)
Ending balance	25	26	25	26
Individually evaluated for impairment	8	6	8	6
Collectively evaluated for impairment	17	20	17	20
Recorded investment in financing receivables by impairment method and type of loan
Individually evaluated for impairment	36		36		42
Collectively evaluated for impairment	2,678		2,678		2,640
Total	2,714		2,714		2,682
Syndicated loans [Member]
Rollforward of the allowance for loan losses
Beginning balance			6	7
Charge-offs			(2)	(1)
Provisions			2
Ending balance	6	6	6	6
Individually evaluated for impairment	0	0	0	0
Collectively evaluated for impairment	6	6	6	6
Recorded investment in financing receivables by impairment method and type of loan
Individually evaluated for impairment	5		5		9
Collectively evaluated for impairment	489		489		370
Total	494		494		379
Total loans purchased	96	8	186	67
Loans sold	1	0	11	2
Consumer loans [Member]
Rollforward of the allowance for loan losses
Beginning balance			5	8
Charge-offs			(1)	(2)
Recoveries				1
Ending balance	4	7	4	7
Individually evaluated for impairment	1	1	1	1
Collectively evaluated for impairment	3	6	3	6
Recorded investment in financing receivables by impairment method and type of loan
Individually evaluated for impairment	7		7		7
Collectively evaluated for impairment	780		780		873
Total	$ 787		$ 787		$ 880

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

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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 recovery of financing receivables doubtful of collection that were previously charged off.

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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 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.

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