Fair Value Option - Fair Value Option on Liabilities (Details) - USD ($) $ in Millions		Sep. 30, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Long-term debt		$ 253	$ 1,317
Due to affiliates		0	485
Total fixed rate debt accounted for under FVO		253	1,802
Unpaid principal balance of fixed rate debt accounted for under FVO	[1]	236	1,712
Change in debt balance from foreign currency translation adjustment		$ (7)	$ (310)

[1] Balance includes a foreign currency translation adjustment relating to our foreign denominated FVO debt which decreased the debt balance by $7 million at September 30, 2017 and decreased the debt balance by $310 million at December 31, 2016.