Contracts Accounted for as Insurance - Gross Premium Receivable Net of Commissions on Assumed Business Roll Forward (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Gross Premium Receivable Net of Ceding Commissions [Roll Forward]
Beginning of period		$ 693	[1]	$ 729	[1]	$ 876
Premiums receivable from acquisitions (see Note 2)		18		2		0
Gross written premiums on new business, net of commissions on assumed business		193		198		171
Gross premiums received, net of commissions on assumed business		(258)		(206)		(230)
Adjustments:
Changes in the expected term		(38)		(19)		(66)
Accretion of discount, net of commissions on assumed business		9		18		10
Foreign exchange translation		(41)		(25)		(31)
Consolidation/deconsolidation of FG VIEs		0		(4)		(1)
End of period	[1]	576		693		729
Variable Interest Entity, Primary Beneficiary [Member]
Gross Premium Receivable Net of Ceding Commissions [Roll Forward]
Beginning of period		17		19
Adjustments:
End of period		$ 11		$ 17		$ 19

[1] (1)Excludes $11 million, $17 million and $19 million as of December 31, 2016 , 2015 and 2014, respectively, related to consolidated FG VIEs.