Other Expenses (Other Expenses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Other Income and Expenses [Abstract]
Compensation	$ 1,310	$ 1,291
Pension, postretirement and postemployment benefit costs	140	92
Commissions	1,134	1,157
Volume-related costs	266	242
Capitalization of DAC	(981)	(968)
Amortization of DAC and VOBA	995	1,025
Amortization of negative VOBA	(99)	(100)
Interest expense on debt	312	298
Premium taxes, licenses and fees	215	173
Professional services	330	330
Rent and related expenses, net of sublease income	97	83
Other	473	437
Total other expenses	$ 4,192	$ 4,060