Related Party Transactions (Service Agreements - Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Related Party Transaction, Due from (to) Related Party [Abstract]
Net receivables (payables) due from (to) affiliates	$ 73		$ 73		$ 107
Related Party Transaction [Line Items]
Other expenses	434	547	1,210	1,891
Universal life and investment-type product policy fees	624	572	1,744	1,691
Other revenues	152	137	447	385
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Other expenses	329	361	1,100	1,200
Universal life and investment-type product policy fees	53	46	155	132
Other revenues	$ 46	$ 43	$ 138	$ 123