Policyholder Account Balances, Future Policy Benefits and Claims and Separate Account Liabilities (Details) - USD ($) $ in Millions		Dec. 31, 2016		Dec. 31, 2015
Policyholder account balances		$ 20,595		$ 20,650
Future policy benefits		8,723		8,180
Policy claims and other policyholders' funds		884		869
Policyholder account balances, future policy benefits and claims		30,202		29,699
Fixed annuities [Member]
Policyholder account balances		10,565		11,239
Variable annuity fixed sub-accounts [Member]
Policyholder account balances		5,211		4,912
VUL/UL insurance [Member]
Policyholder account balances		3,007		2,897
IUL insurance [Member]
Policyholder account balances		1,054		808
Other life insurance [Member]
Policyholder account balances		758		794
Variable annuity GMWB [Member]
Future policy benefits		1,017		1,057
Variable annuity GMAB [Member]
Future policy benefits		(24)	[1]	0
Other annuity liabilities [Member]
Future policy benefits		64		31
Fixed annuities life contingent liabilities [Member]
Future policy benefits		1,497		1,501
EIA [Member]
Policyholder account balances		23		25
Future policy benefits	[2]	25		27
Life, DI and LTC insurance [Member]
Future policy benefits		5,556		5,112
Policy claims and other policyholders' funds		1,200		1,100
VUL/UL and other life insurance additional liabilities [Member]
Future policy benefits		$ 588		$ 452

[1] Includes the fair value of GMAB embedded derivatives that was a net asset at December 31, 2016 reported as a contra liability.

[2] Includes approximately $23 million and $25 million of policyholder account balances as of December 31, 2016 and 2015, respectively.