Related Party Transactions (Service Agreements - Narrative) (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	Dec. 31, 2012
Related Party Transaction, Due from (to) Related Party [Abstract]
Net receivables (payables) due from (to) affiliates	$ 99		$ 99		$ 107
Related Party Transaction [Line Items]
Other expenses	368	887	776	1,344
Universal life and investment-type product policy fees	556	575	1,120	1,119
Other revenues	138	125	295	248
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Other expenses	372	423	816	862
Universal life and investment-type product policy fees	52	44	102	86
Other revenues	$ 46	$ 40	$ 92	$ 80