Deferred Policy Acquisition Costs, Value of Business Acquired and Other Policy-Related Intangibles (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Finite Lived Intangible Liabilities
Balance at January 1,	$ 3,657	$ 4,287	$ 0
Acquisitions	10	7	4,422
Amortization of negative VOBA	(622)	(697)	(64)
Effect of foreign currency translation	(129)	60	(71)
Balance at December 31,	2,916	3,657	4,287
Accumulated Amortization	$ 1,383	$ 761	$ 64