Other Expenses (Other Expenses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Other Income and Expenses [Abstract]
Compensation	$ 1,189	$ 1,310
Pension, postretirement and postemployment benefit costs	80	140
Commissions	1,010	1,134
Volume-related costs	198	266
Capitalization of DAC	(796)	(981)
Amortization of DAC and VOBA	533	995
Amortization of negative VOBA	(43)	(99)
Interest expense on debt	296	312
Premium taxes, licenses and fees	188	215
Professional services	387	330
Rent and related expenses, net of sublease income	81	97
Other	441	473
Total other expenses	$ 3,564	$ 4,192