Fair Value (Financial Instruments Carried at Other Than Fair Value) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Assets
Policy loans	$ 11,756	$ 11,764
Liabilities
Collateral financing arrangements	4,196	4,196
Junior subordinated debt securities	3,193	3,193
Separate account liabilities	319,480	317,201
Estimated Fair Value [Member]
Assets
Mortgage loans	60,226	57,924
Policy loans	13,428	13,206
Real estate joint ventures	162	169
Other Limited Partnership Interests	1,047	1,109
Other invested assets	603	844
Premiums, reinsurance and other receivables	3,782	3,110
Other assets	700	352
Liabilities
Policyholder account balances	145,619	144,631
Long-term Debt	18,042	18,564
Collateral financing arrangements	3,993	3,984
Junior subordinated debt securities	4,176	3,789
Other Liabilities	6,275	2,240
Separate account liabilities	119,328	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	202	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	1,684	1,694
Real estate joint ventures	0	0
Other Limited Partnership Interests	0	0
Other invested assets	74	163
Premiums, reinsurance and other receivables	1,380	728
Other assets	626	210
Liabilities
Policyholder account balances	0	0
Long-term Debt	18,042	18,564
Collateral financing arrangements	0	0
Junior subordinated debt securities	4,176	3,789
Other Liabilities	4,981	948
Separate account liabilities	119,328	117,562
Estimated Fair Value [Member] | Level 3 [Member]
Assets
Mortgage loans	60,226	57,924
Policy loans	11,744	11,512
Real estate joint ventures	162	169
Other Limited Partnership Interests	1,047	1,109
Other invested assets	327	359
Premiums, reinsurance and other receivables	2,402	2,382
Other assets	74	142
Liabilities
Policyholder account balances	145,619	144,631
Long-term Debt	0	0
Collateral financing arrangements	3,993	3,984
Junior subordinated debt securities	0	0
Other Liabilities	1,294	1,292
Separate account liabilities	0	0
Carrying Value [Member]
Assets
Mortgage loans	57,427	55,770
Policy loans	11,756	11,764
Real estate joint ventures	83	102
Other Limited Partnership Interests	774	950
Other invested assets	603	844
Premiums, reinsurance and other receivables	3,726	3,116
Other assets	710	324
Liabilities
Policyholder account balances	139,278	139,735
Long-term Debt	16,174	17,170
Collateral financing arrangements	4,196	4,196
Junior subordinated debt securities	3,193	3,193
Other Liabilities	6,274	2,239
Separate account liabilities	$ 119,328	$ 117,562