Sales Inducements (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Document Period End Date	Mar. 31, 2013
Deferred Sales Inducements, Amortization Expense	$ 11,000,000	$ 10,000,000
Changes in deferred sales inducement
Balance, January 1	325,000,000	434,000,000
Sales inducements deferred	0	1,000,000
Amortization - Unlock	56,000,000	(5,000,000)
Deferred Sales Inducements, Amortization Expense	11,000,000	10,000,000
Balance, September 30	187,000,000	430,000,000
Retirement Plans and Individual Life Businesses [Member]
Deferred Sales Inducements, Amortization Expense	71,000,000	0
Changes in deferred sales inducement
Deferred Sales Inducements, Amortization Expense	71,000,000	0
Individual Life [Member]
Deferred Sales Inducements, Amortization Expense	49
Changes in deferred sales inducement
Deferred Sales Inducements, Amortization Expense	49
Retirement Plans [Member]
Deferred Sales Inducements, Amortization Expense	22
Changes in deferred sales inducement
Deferred Sales Inducements, Amortization Expense	22
Individual Annuity [Member]
Changes in deferred sales inducement
Amortization - Unlock	$ 0