Insurance (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Insurance Liabilities
Future policy benefits	$ 184,141	$ 184,275
Policyholder account balances	220,813	217,700
Other policy-related balances	16,029	15,599
Latin America [Member]
Insurance Liabilities
Future policy benefits	6,975	6,299
Policyholder account balances	6,828	6,159
Other policy-related balances	1,600	1,432
Asia [Member]
Insurance Liabilities
Future policy benefits	30,817	31,555
Policyholder account balances	61,122	59,578
Other policy-related balances	5,788	5,876
Europe, the Middle East and Africa [Member]
Insurance Liabilities
Future policy benefits	7,994	7,728
Policyholder account balances	15,161	14,396
Other policy-related balances	1,585	1,482
Retail Products [Member]
Insurance Liabilities
Future policy benefits	62,624	62,295
Policyholder account balances	67,207	69,553
Other policy-related balances	2,841	2,807
Group, Voluntary and Worksite Benefits [Member]
Insurance Liabilities
Future policy benefits	20,570	20,465
Policyholder account balances	9,242	9,273
Other policy-related balances	3,532	3,378
Corporate Benefit Funding [Member]
Insurance Liabilities
Future policy benefits	49,182	49,657
Policyholder account balances	59,157	56,367
Other policy-related balances	212	201
Corporate & Other [Member]
Insurance Liabilities
Future policy benefits	5,979	6,276
Policyholder account balances	2,096	2,374
Other policy-related balances	$ 471	$ 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