Consolidated Variable Interest Entities - Number of FG VIE's Consolidated (Details)	3 Months Ended
	Mar. 31, 2015 Entity		Mar. 31, 2014 Entity
Number of FG VIEs Consolidated [Roll Forward]
Number of FG VIE's consolidated	1
Number of FG VIE's matured			(2)
Variable Interest Entity, Primary Beneficiary [Member]
Number of FG VIEs Consolidated [Roll Forward]
Number of FG VIE's consolidated, beginning of period	32		40
Number of FG VIE's consolidated	1	[1]	0	[1]
Number of FG VIE's deconsolidated	0	[1]	(7)	[1]
Number of FG VIE's matured	0		(2)
Number of FG VIE's consolidated, end of period	33		31

[1] Net loss on consolidation was $26 million in First Quarter 2015, and net gain on deconsolidation was $120 million in First Quarter 2014, and recorded in “fair value gains (losses) on FG VIEs” in the consolidated statement of operations.