Investments (Details - RCG FM by maturity date) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Realized Investment Gains And Losses Table Details [Abstract]
Fixed maturities	$ 12	$ 21
Equity securities	4	3
Commercial mortgage loans	(3)	0
Real estate	(1)	0
Other investments, including derivatives	1	2
Total realized investment gains before income taxes	13	26
Less income taxes	(1)	(9)
Net realized investment gains	12	17
Impairments Table Details [Abstract]
Credit-related	5	0
Other	1	0
Total	6	0
Included in fixed maturities:
Trading securities in fixed maturities	2		2
Hybrid securities in fixed maturities	29		28
Total	31		30
Included in equity securities:
Hybrid securities in equity securities	72		65
Sales Information For Available For Sale Fixed Maturies Equity Securities [Abstract]
Proceeds from sales	221	155
Gross gains on sales	15	14
Gross losses on sales	0		0
Amortized Cost:
Due in one year or less	966
Due after one year through five years	5,177
Due after five years through ten years	5,204
Due after ten years	2,756
Mortgage and other asset-backed securities	1,038
Total	15,141
Fair Value:
Due in one year or less	977
Due after one year through five years	5,540
Due after five years through ten years	5,809
Due after ten years	3,499
Mortgage and other asset-backed securities	1,193
Total	$ 17,018