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	3 Months Ended		48 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2013
Net AEP adverse development before consideration of LPT	$ 200	$ 0	$ 900
Provision for uncollectible third-party reinsurance on AEP	0	0
Additional amounts ceded under LPT	200	0
Retroactive reinsurance benefit recognized	(73)	(5)
Pretax impact of deferred retroactive reinsurance benefit	$ 127	$ (5)