Insurance (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Insurance Liabilities
Future policy benefits	$ 184,252	$ 170,912
Policyholder account balances	217,700	210,757	138,515
Other policy-related balances	15,599	15,750
U.S. Business [Member]
Insurance Liabilities
Future policy benefits	132,417	123,988
Policyholder account balances	135,193	133,697	130,495
Other policy-related balances	6,386	6,332
International [Member]
Insurance Liabilities
Future policy benefits	45,661	41,126
Policyholder account balances	82,473	77,018	7,970
Other policy-related balances	8,802	8,995
Japan [Member]
Insurance Liabilities
Future policy benefits	26,659	23,083
Policyholder account balances	58,195	53,161	0
Other policy-related balances	5,212	5,311
International Other Regions [Member]
Insurance Liabilities
Future policy benefits	19,002	18,043
Policyholder account balances	24,278	23,857	7,970
Other policy-related balances	3,590	3,684
Insurance Products [Member] \| U.S. Business [Member]
Insurance Liabilities
Future policy benefits	74,390	72,936
Policyholder account balances	30,196	29,407	28,118
Other policy-related balances	6,000	5,831
Retirement Products [Member] \| U.S. Business [Member]
Insurance Liabilities
Future policy benefits	10,455	8,829
Policyholder account balances	48,689	46,517	46,855
Other policy-related balances	161	146
Corporate Benefit Funding [Member] \| U.S. Business [Member]
Insurance Liabilities
Future policy benefits	44,471	39,187
Policyholder account balances	56,308	57,773	55,522
Other policy-related balances	181	184
Auto Home [Member] \| U.S. Business [Member]
Insurance Liabilities
Future policy benefits	3,101	3,036
Policyholder account balances	0	0	0
Other policy-related balances	44	171
Corporate & Other [Member]
Insurance Liabilities
Future policy benefits	6,174	5,798
Policyholder account balances	34	42	50
Other policy-related balances	$ 411	$ 423

The sum of the known and estimated amounts payable as of the balance sheet date to policyholders pertaining to insured events for long-duration contracts, which can be viewed as either (a) the present value of future benefits to be paid to or on behalf of policyholders and expenses less the present value of future net premiums payable under the insurance contracts or (b) the accumulated amount of net premiums already collected less the accumulated amount of benefits and expenses already paid to or on behalf of policyholders.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 7

-Section 03

-Paragraph 13

-Subparagraph a

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 40

-Section 25

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=6482067&loc=d3e13145-158430

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 97

-Paragraph 15-21

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.13(a)(1))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 113

-Paragraph 26

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 60

-Paragraph 21-26

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details