Fair Value (Details 10) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Mortgage loans [Abstract]
Mortgage Loans on Real Estate, Commercial and Consumer, Net	$ 57,201	$ 56,915
Held-for-sale	461	10,716
Policy loans	11,912	11,892
Other Limited Partnership Interests	6,726	6,378
Other Investments	24,288	23,581
Liabilities
Policyholder account balances	225,909	217,700
Bank deposits	6,832	10,507
Long-term Debt	18,879	23,692
Collateral financing arrangements	4,196	4,647
Junior subordinated debt securities	3,192	3,192
Other Liabilities	25,395	30,914
Separate account liabilities	220,317	203,023
Mortgage Loan Commitments [Member]
Commitments [Abstract]
Commitments to fund bank credit facilities, bridge loans and private corporate bond investments	3,900	4,100
Commitments to Extend Credit [Member]
Commitments [Abstract]
Commitments to fund bank credit facilities, bridge loans and private corporate bond investments	1,400	1,400
Estimate of Fair Value, Fair Value Disclosure [Member]
Mortgage loans [Abstract]
Mortgage Loans on Real Estate, Commercial and Consumer, Net	57,129	56,422
Held-for-sale	1,279	4,462
Mortgage loans, net	58,408	60,884
Policy loans	14,432	14,213
Real estate joint ventures	175	183
Other Limited Partnership Interests	1,426	1,656
Other Investments	1,472	1,434
Premiums, reinsurance and other receivables	4,883	5,232
Other assets	282	308
Liabilities
Policyholder account balances	160,388	153,304
Bank deposits	6,832	10,507
Long-term Debt	18,144	22,514
Collateral financing arrangements	3,792	4,136
Junior subordinated debt securities	3,620	3,491
Other Liabilities	6,432	4,087
Separate account liabilities	54,769	49,610
Estimate of Fair Value, Fair Value Disclosure [Member] | Mortgage Loan Commitments [Member]
Commitments [Abstract]
Commitments to fund bank credit facilities, bridge loans and private corporate bond investments	35	3
Estimate of Fair Value, Fair Value Disclosure [Member] | Commitments to Extend Credit [Member]
Commitments [Abstract]
Commitments to fund bank credit facilities, bridge loans and private corporate bond investments	22	51
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 1 [Member]
Mortgage loans [Abstract]
Mortgage Loans on Real Estate, Commercial and Consumer, Net	0
Held-for-sale	0
Mortgage loans, net	0
Policy loans	0
Real estate joint ventures	0
Other Limited Partnership Interests	0
Other Investments	77
Premiums, reinsurance and other receivables	0
Other assets	0
Liabilities
Policyholder account balances	0
Bank deposits	0
Long-term Debt	0
Collateral financing arrangements	0
Junior subordinated debt securities	0
Other Liabilities	0
Separate account liabilities	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 1 [Member] | Mortgage Loan Commitments [Member]
Commitments [Abstract]
Commitments to fund bank credit facilities, bridge loans and private corporate bond investments	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 1 [Member] | Commitments to Extend Credit [Member]
Commitments [Abstract]
Commitments to fund bank credit facilities, bridge loans and private corporate bond investments	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 2 [Member]
Mortgage loans [Abstract]
Mortgage Loans on Real Estate, Commercial and Consumer, Net	0
Held-for-sale	0
Mortgage loans, net	0
Policy loans	1,699
Real estate joint ventures	0
Other Limited Partnership Interests	0
Other Investments	0
Premiums, reinsurance and other receivables	552
Other assets	211
Liabilities
Policyholder account balances	0
Bank deposits	2,101
Long-term Debt	18,144
Collateral financing arrangements	0
Junior subordinated debt securities	3,620
Other Liabilities	2,850
Separate account liabilities	54,769
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 2 [Member] | Mortgage Loan Commitments [Member]
Commitments [Abstract]
Commitments to fund bank credit facilities, bridge loans and private corporate bond investments	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 2 [Member] | Commitments to Extend Credit [Member]
Commitments [Abstract]
Commitments to fund bank credit facilities, bridge loans and private corporate bond investments	22
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 3 [Member]
Mortgage loans [Abstract]
Mortgage Loans on Real Estate, Commercial and Consumer, Net	57,129
Held-for-sale	1,279
Mortgage loans, net	58,408
Policy loans	12,733
Real estate joint ventures	175
Other Limited Partnership Interests	1,426
Other Investments	1,395
Premiums, reinsurance and other receivables	4,331
Other assets	71
Liabilities
Policyholder account balances	160,388
Bank deposits	4,731
Long-term Debt	0
Collateral financing arrangements	3,792
Junior subordinated debt securities	0
Other Liabilities	3,582
Separate account liabilities	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 3 [Member] | Mortgage Loan Commitments [Member]
Commitments [Abstract]
Commitments to fund bank credit facilities, bridge loans and private corporate bond investments	35
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 3 [Member] | Commitments to Extend Credit [Member]
Commitments [Abstract]
Commitments to fund bank credit facilities, bridge loans and private corporate bond investments	0
Carrying Value [Member]
Mortgage loans [Abstract]
Mortgage Loans on Real Estate, Commercial and Consumer, Net	54,269	53,777
Held-for-sale	1,279	4,462
Mortgage loans, net	55,548	58,239
Policy loans	11,912	11,892
Real estate joint ventures	117	130
Other Limited Partnership Interests	1,246	1,318
Other Investments	1,472	1,434
Premiums, reinsurance and other receivables	4,413	4,639
Other assets	253	310
Liabilities
Policyholder account balances	153,131	146,890
Bank deposits	6,832	10,507
Long-term Debt	16,023	20,587
Collateral financing arrangements	4,196	4,647
Junior subordinated debt securities	3,192	3,192
Other Liabilities	6,430	4,087
Separate account liabilities	54,769	49,610
Carrying Value [Member] | Mortgage Loan Commitments [Member]
Commitments [Abstract]
Commitments to fund bank credit facilities, bridge loans and private corporate bond investments	0	0
Carrying Value [Member] | Commitments to Extend Credit [Member]
Commitments [Abstract]
Commitments to fund bank credit facilities, bridge loans and private corporate bond investments	$ 0	$ 0