Fair Value Option - Fair Value Option on Liabilities (Details) - USD ($) $ in Millions		Dec. 31, 2016	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Long-term debt		$ 1,317	$ 3,257
Due to affiliates		485	496
Total fixed rate debt accounted for under FVO		1,802	3,753
Unpaid principal balance of fixed rate debt accounted for under FVO	[1]	1,712	3,598
Fixed rate long-term debt not accounted for under FVO		2,619	4,074
Change in debt balance from foreign currency translation adjustment		$ (310)	$ (283)

[1] Balance includes a foreign currency translation adjustment relating to our foreign denominated FVO debt which decreased the debt balance by $310 million at December 31, 2016 and decreased the debt balance by $283 million at December 31, 2015.