Commitments and Guarantees (Reinsurance Agreements Exposure and Reserves) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Reinsurance agreements - aggregate maximum exposure	$ 5,713		$ 4,542
Excess of Loss	6.00%		8.00%
Quota Share	94.00%		92.00%
Beginning Balance - Reinsurance Reserves	150	220	220
Paid Losses	(73)	(43)
Net Provision	16	21
Changes to Agreements	0	(3)
Ending Balance - Reinsurance Reserves	93	195	150
Accidental Death and Dismemberment [Member]
Reinsurance agreements - aggregate maximum exposure	2,372		2,367
Credit Life and Disability [Member]
Reinsurance agreements - aggregate maximum exposure	973		1,003
Lender Placed Hazard [Member]
Reinsurance agreements - aggregate maximum exposure	1,987		709
Lender and Borrower Paid Mortgage Insurance [Member]
Reinsurance agreements - aggregate maximum exposure	381		463
Agreements With Full Reinsurance [Member]
Reinsurance agreements - aggregate maximum exposure	$ 973		$ 1,001