Fair Value (Financial Instruments Carried at Other Than Fair Value) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Assets
Policy loans	$ 11,764	$ 11,884
Liabilities
Collateral financing arrangements	4,196	4,196
Junior subordinated debt securities	3,193	3,192
Separate account liabilities	317,201	235,393
Estimated Fair Value [Member]
Assets
Held-for-investment	57,921	57,381
Held-for-sale	3	365
Mortgage loans, net	57,924	57,746
Policy loans	13,206	14,257
Real estate joint ventures	169	171
Other Limited Partnership Interests	1,109	1,277
Other invested assets	844	815
Premiums, reinsurance and other receivables	3,110	3,705
Other assets	352	292
Liabilities
Policyholder account balances	144,631	158,040
Bank deposits	0	6,416
Long-term Debt	18,564	18,978
Collateral financing arrangements	3,984	3,839
Junior subordinated debt securities	3,789	3,984
Other Liabilities	2,240	1,916
Separate account liabilities	117,562	58,726
Estimated Fair Value [Member] | Level 1 [Member]
Assets
Held-for-investment	0	0
Held-for-sale	0	0
Mortgage loans, net	0	0
Policy loans	0	0
Real estate joint ventures	0	0
Other Limited Partnership Interests	0	0
Other invested assets	322	305
Premiums, reinsurance and other receivables	0	0
Other assets	0	0
Liabilities
Policyholder account balances	0	0
Bank deposits	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
Held-for-investment	0	0
Held-for-sale	0	0
Mortgage loans, net	0	0
Policy loans	1,694	1,690
Real estate joint ventures	0	0
Other Limited Partnership Interests	0	0
Other invested assets	163	144
Premiums, reinsurance and other receivables	728	745
Other assets	210	214
Liabilities
Policyholder account balances	0	0
Bank deposits	0	2,018
Long-term Debt	18,564	18,978
Collateral financing arrangements	0	0
Junior subordinated debt securities	3,789	3,984
Other Liabilities	948	673
Separate account liabilities	117,562	58,726
Estimated Fair Value [Member] | Level 3 [Member]
Assets
Held-for-investment	57,921	57,381
Held-for-sale	3	365
Mortgage loans, net	57,924	57,746
Policy loans	11,512	12,567
Real estate joint ventures	169	171
Other Limited Partnership Interests	1,109	1,277
Other invested assets	359	366
Premiums, reinsurance and other receivables	2,382	2,960
Other assets	142	78
Liabilities
Policyholder account balances	144,631	158,040
Bank deposits	0	4,398
Long-term Debt	0	0
Collateral financing arrangements	3,984	3,839
Junior subordinated debt securities	0	0
Other Liabilities	1,292	1,243
Separate account liabilities	0	0
Carrying Value [Member]
Assets
Held-for-investment	55,767	53,926
Held-for-sale	3	365
Mortgage loans, net	55,770	54,291
Policy loans	11,764	11,884
Real estate joint ventures	102	113
Other Limited Partnership Interests	950	1,154
Other invested assets	844	815
Premiums, reinsurance and other receivables	3,116	3,287
Other assets	324	260
Liabilities
Policyholder account balances	139,735	149,928
Bank deposits	0	6,416
Long-term Debt	17,170	16,502
Collateral financing arrangements	4,196	4,196
Junior subordinated debt securities	3,193	3,192
Other Liabilities	2,239	1,913
Separate account liabilities	$ 117,562	$ 58,726