Financing Receivables (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013 item	Jun. 30, 2012 item	Jun. 30, 2013 item	Jun. 30, 2012 item
Troubled Debt Restructurings
Number of Loans	3	1	5	2
Recorded Investment	$ 9	$ 1	$ 9	$ 2
Commitments to lend additional funds to borrowers for restructured loans	0		0
Commercial Mortgage Loans
Troubled Debt Restructurings
Number of Loans	3	1	3	1
Recorded Investment	9	1	9	1
Residential Mortgage Loans
Troubled Debt Restructurings
Number of Loans			2
Syndicated Loans
Troubled Debt Restructurings
Number of Loans				1
Recorded Investment				$ 1