Consolidated Variable Interest Entities - Number of FG VIE's Consolidated (Details) - Entity		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015
Number of FG VIEs Consolidated [Roll Forward]
Number of FG VIE's, Radian Asset acquisition		0	4
Number of FG VIE's, matured		(1)	0
Variable Interest Entity, Primary Beneficiary [Member]
Number of FG VIEs Consolidated [Roll Forward]
Number of FG VIE's consolidated, beginning of period		34	32
Number of FG VIE's consolidated	[1]	0	1
Number of FG VIE's deconsolidated	[1]	(1)	0
Number of FG VIE's consolidated, end of period		32	37

[1] Net loss on deconsolidation was de minimis in Six Months 2016, and net loss on consolidation was $26 million in Six Months 2015, and recorded in “fair value gains (losses) on FG VIEs” in the consolidated statement of operations.