Fair Value (Financial Instruments Carried at Other Than Fair Value) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Assets
Policy loans	$ 11,785	$ 11,764
Liabilities
Collateral financing arrangements	4,196	4,196
Junior subordinated debt securities	3,193	3,193
Separate account liabilities	324,977	317,201
Estimated Fair Value [Member]
Assets
Mortgage loans	59,194	57,924
Policy loans	13,458	13,206
Real estate joint ventures	171	169
Other Limited Partnership Interests	1,085	1,109
Other invested assets	656	844
Premiums, reinsurance and other receivables	4,062	3,110
Other assets	1,050	352
Liabilities
Policyholder account balances	144,112	144,631
Long-term Debt	18,293	18,564
Collateral financing arrangements	3,993	3,984
Junior subordinated debt securities	4,131	3,789
Other Liabilities	5,903	2,240
Separate account liabilities	119,236	117,562
Estimated Fair Value [Member] | Level 1 [Member]
Assets
Mortgage loans	0	0
Policy loans	0	0
Real estate joint ventures	0	0
Other Limited Partnership Interests	0	0
Other invested assets	216	322
Premiums, reinsurance and other receivables	0	0
Other assets	0	0
Liabilities
Policyholder account balances	0	0
Long-term Debt	0	0
Collateral financing arrangements	0	0
Junior subordinated debt securities	0	0
Other Liabilities	0	0
Separate account liabilities	0	0
Estimated Fair Value [Member] | Level 2 [Member]
Assets
Mortgage loans	0	0
Policy loans	1,689	1,694
Real estate joint ventures	0	0
Other Limited Partnership Interests	0	0
Other invested assets	95	163
Premiums, reinsurance and other receivables	1,642	728
Other assets	974	210
Liabilities
Policyholder account balances	0	0
Long-term Debt	18,293	18,564
Collateral financing arrangements	0	0
Junior subordinated debt securities	4,131	3,789
Other Liabilities	4,610	948
Separate account liabilities	119,236	117,562
Estimated Fair Value [Member] | Level 3 [Member]
Assets
Mortgage loans	59,194	57,924
Policy loans	11,769	11,512
Real estate joint ventures	171	169
Other Limited Partnership Interests	1,085	1,109
Other invested assets	345	359
Premiums, reinsurance and other receivables	2,420	2,382
Other assets	76	142
Liabilities
Policyholder account balances	144,112	144,631
Long-term Debt	0	0
Collateral financing arrangements	3,993	3,984
Junior subordinated debt securities	0	0
Other Liabilities	1,293	1,292
Separate account liabilities	0	0
Carrying Value [Member]
Assets
Mortgage loans	56,218	55,770
Policy loans	11,785	11,764
Real estate joint ventures	92	102
Other Limited Partnership Interests	847	950
Other invested assets	656	844
Premiums, reinsurance and other receivables	4,014	3,116
Other assets	1,057	324
Liabilities
Policyholder account balances	138,216	139,735
Long-term Debt	16,248	17,170
Collateral financing arrangements	4,196	4,196
Junior subordinated debt securities	3,193	3,193
Other Liabilities	5,900	2,239
Separate account liabilities	$ 119,236	$ 117,562