Goodwill (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Goodwill [Roll Forward]
Gross	$ 1,981	$ 1,981
Accumulated Impairments	(945)	(930)
Carrying value	1,036	1,051
Property & Casualty Commercial [Member] | Commercial Markets [Member]
Goodwill [Roll Forward]
Gross	30	30
Accumulated Impairments	0	0
Carrying value	30	30
Consumer Markets [Member]
Goodwill [Roll Forward]
Gross	119	119
Accumulated Impairments	0	0
Carrying value	119	119
Global Annuity [Member] | Wealth Management [Member]
Goodwill [Roll Forward]
Gross	422	422
Accumulated Impairments	(422)	(422)
Carrying value	0	0
Life Insurance [Member] | Wealth Management [Member]
Goodwill [Roll Forward]
Gross	224	224
Accumulated Impairments	0	0
Carrying value	224	224
Retirement Plans [Member] | Wealth Management [Member]
Goodwill [Roll Forward]
Gross	87	87
Accumulated Impairments	0	0
Carrying value	87	87
Mutual Funds [Member] | Wealth Management [Member]
Goodwill [Roll Forward]
Gross	159	159
Accumulated Impairments	0	0
Carrying value	159	159
Corporate and Other [Member]
Goodwill [Roll Forward]
Gross	940	940
Accumulated Impairments	(523)	(508)
Carrying value	417	432
Commercial Markets [Member]
Goodwill [Roll Forward]
Gross	30	30
Accumulated Impairments	0	0
Carrying value	30	30
Wealth Management [Member]
Goodwill [Roll Forward]
Gross	892	892
Accumulated Impairments	(422)	(422)
Carrying value	$ 470	$ 470