Acquisitions and Sale of Businesses (Details 1) - Run-off long-term care insurance business [Member] - USD ($) $ in Millions		3 Months Ended	6 Months Ended
		Mar. 31, 2015	Jun. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Estimated sale proceeds	[1]	$ 14
Assets of businesses sold:
Cash and investments		1,397
Recoverables from reinsurers		603
Deferred policy acquisition costs		15
Other receivables		14
Other assets		7
Goodwill		2
Total assets		2,038
Liabilities of businesses sold:
Annuity benefits accumulated		270
Life, accident and health reserves		1,537
Other liabilities		27
Total liabilities		1,834
Reclassify net unrealized gain on marketable securities		28
Net assets of businesses sold		176
Pretax loss on subsidiaries recorded in the first quarter of 2015		$ (162)	$ (162)

[1] Includes fair value of the potential additional consideration and is shown net of estimated expenses.