Other Expenses (Other Expenses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Income and Expenses [Abstract]
Compensation	$ 346	$ 472	$ 320
Commissions	542	650	492
Volume-related costs	170	134	170
Affiliated expenses on ceded and assumed reinsurance	314	205	325
Capitalization of DAC	(282)	(325)	(279)
Interest expense on debt	70	76	109
Premium taxes, licenses and fees	56	67	53
Professional services	84	21	58
Rent and related expenses	45	53	41
Other	393	369	475
Total other expenses	$ 1,738	$ 1,722	$ 1,764