Financing Receivables (Mortgage Loans on Real Estate Schedule) (Details 2) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Commercial mortgage loans
Percent of commercial mortgage loans with highest risk rating	1.00%	2.00%
Total loans	$ 3,931	$ 3,941
Less: allowance for loan losses	33	37	42	44
Commercial Real Estate Portfolio Segment [Member]
Commercial mortgage loans
Total loans	2,705	2,682
Less: allowance for loan losses	25	26	29	29
Net commercial mortgage loans	2,680	2,656
Percentage of gross commercial mortgage loans	100.00%	100.00%
Commercial Real Estate Portfolio Segment [Member] | Apartment Building [Member]
Commercial mortgage loans
Total loans	465	488
Percentage of gross commercial mortgage loans	17.00%	18.00%
Commercial Real Estate Portfolio Segment [Member] | Hotel
Commercial mortgage loans
Total loans	35	33
Percentage of gross commercial mortgage loans	1.00%	1.00%
Commercial Real Estate Portfolio Segment [Member] | Industrial
Commercial mortgage loans
Total loans	475	454
Percentage of gross commercial mortgage loans	17.00%	17.00%
Commercial Real Estate Portfolio Segment [Member] | Mixed Use
Commercial mortgage loans
Total loans	45	36
Percentage of gross commercial mortgage loans	2.00%	1.00%
Commercial Real Estate Portfolio Segment [Member] | Office
Commercial mortgage loans
Total loans	563	559
Percentage of gross commercial mortgage loans	21.00%	21.00%
Commercial Real Estate Portfolio Segment [Member] | Retail
Commercial mortgage loans
Total loans	966	951
Percentage of gross commercial mortgage loans	36.00%	36.00%
Commercial Real Estate Portfolio Segment [Member] | Other
Commercial mortgage loans
Total loans	156	161
Percentage of gross commercial mortgage loans	6.00%	6.00%
Commercial Real Estate Portfolio Segment [Member] | East North Central
Commercial mortgage loans
Total loans	239	251
Percentage of gross commercial mortgage loans	9.00%	9.00%
Commercial Real Estate Portfolio Segment [Member] | East South Central
Commercial mortgage loans
Total loans	65	71
Percentage of gross commercial mortgage loans	2.00%	3.00%
Commercial Real Estate Portfolio Segment [Member] | Middle Atlantic
Commercial mortgage loans
Total loans	221	211
Percentage of gross commercial mortgage loans	8.00%	8.00%
Commercial Real Estate Portfolio Segment [Member] | Mountain
Commercial mortgage loans
Total loans	262	257
Percentage of gross commercial mortgage loans	10.00%	10.00%
Commercial Real Estate Portfolio Segment [Member] | New England
Commercial mortgage loans
Total loans	142	149
Percentage of gross commercial mortgage loans	5.00%	5.00%
Commercial Real Estate Portfolio Segment [Member] | Pacific
Commercial mortgage loans
Total loans	671	661
Percentage of gross commercial mortgage loans	25.00%	25.00%
Commercial Real Estate Portfolio Segment [Member] | South Atlantic
Commercial mortgage loans
Total loans	736	713
Percentage of gross commercial mortgage loans	27.00%	26.00%
Commercial Real Estate Portfolio Segment [Member] | West North Central
Commercial mortgage loans
Total loans	212	207
Percentage of gross commercial mortgage loans	8.00%	8.00%
Commercial Real Estate Portfolio Segment [Member] | West South Central
Commercial mortgage loans
Total loans	$ 157	$ 162
Percentage of gross commercial mortgage loans	6.00%	6.00%