Claim and Claim Adjustment Expense Reserves (Impact of Loss Portfolio Transfer on the Consolidated Statement of Operations) (Details) (Loss Portfolio Transfer [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Loss Portfolio Transfer [Member]
Net AEP adverse development before consideration of LPT	$ 363	$ 261	$ 84
Provision for uncollectible third-party reinsurance on AEP	140
Additional amounts ceded under LPT	503	261	84
Retroactive reinsurance benefit recognized	(314)	(261)	(84)
Pretax impact of unrecognized deferred retroactive reinsurance benefit	$ 189