General (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Premiums and contract charges by product
Premiums	$ 150	$ 152	$ 295	$ 298
Contract charges	260	256	524	511
Total premiums and contract charges	410	408	819	809
Traditional life insurance
Premiums and contract charges by product
Premiums	116	114	228	223
Immediate annuities with life contingencies
Premiums and contract charges by product
Premiums	9	14	16	26
Accident and health insurance
Premiums and contract charges by product
Premiums	25	24	51	49
Interest-sensitive life insurance
Premiums and contract charges by product
Contract charges	256	251	517	500
Fixed annuities
Premiums and contract charges by product
Contract charges	$ 4	$ 5	$ 7	$ 11