Reinsurance (Effects of Reinsurance on Balance Sheet) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Assets:
Premiums and Other Receivables, Net	$ 21,859	$ 21,634
Deferred Policy Acquisition Costs and Value of Business Acquired	26,706	24,761	24,619
Total assets	48,565	46,395
Liabilities:
Future policy benefits (includes $516 and $0, respectively, relating to variable interest entities)	187,942	192,351
Policyholder account balances	212,885	225,821	217,700
Other policy-related balances (includes $123 and $0, respectively, relating to variable interest entities)	15,214	15,463
Other Liabilities	23,168	22,492
Total liabilities	439,209	456,127
Assumed Reinsurance [Member]
Assets:
Premiums and Other Receivables, Net	593	548
Deferred Policy Acquisition Costs and Value of Business Acquired	104	92
Total assets	697	640
Liabilities:
Future policy benefits (includes $516 and $0, respectively, relating to variable interest entities)	2,034	2,031
Policyholder account balances	1,277	2,594
Other policy-related balances (includes $123 and $0, respectively, relating to variable interest entities)	353	313
Other Liabilities	533	543
Total liabilities	4,197	5,481
Ceded Reinsurance [Member]
Assets:
Premiums and Other Receivables, Net	15,018	14,800
Deferred Policy Acquisition Costs and Value of Business Acquired	(352)	(120)
Total assets	14,666	14,680
Liabilities:
Future policy benefits (includes $516 and $0, respectively, relating to variable interest entities)	0	(1)
Policyholder account balances	(2)	(2)
Other policy-related balances (includes $123 and $0, respectively, relating to variable interest entities)	23	8
Other Liabilities	3,044	3,024
Total liabilities	3,065	3,029
Direct Reinsurance [Member]
Assets:
Premiums and Other Receivables, Net	6,248	6,286
Deferred Policy Acquisition Costs and Value of Business Acquired	26,954	24,789
Total assets	33,202	31,075
Liabilities:
Future policy benefits (includes $516 and $0, respectively, relating to variable interest entities)	185,908	190,321
Policyholder account balances	211,610	223,229
Other policy-related balances (includes $123 and $0, respectively, relating to variable interest entities)	14,838	15,142
Other Liabilities	19,591	18,925
Total liabilities	$ 431,947	$ 447,617