Variable Interest Entities ("VIE's") (CLN Structures' Underlying Collateral By Industry And Rating) (Details)	Sep. 30, 2015
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	100.00%
AAA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.60%
AA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	13.50%
A [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	35.70%
BBB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	38.50%
BB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	10.20%
B [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	1.20%
CCC [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.30%
Financial Intermediaries [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	10.50%
Financial Intermediaries [Member] | AAA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Financial Intermediaries [Member] | AA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	2.10%
Financial Intermediaries [Member] | A [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	5.40%
Financial Intermediaries [Member] | BBB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	3.00%
Financial Intermediaries [Member] | BB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Financial Intermediaries [Member] | B [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Financial Intermediaries [Member] | CCC [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Telecommunications [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	11.00%
Telecommunications [Member] | AAA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Telecommunications [Member] | AA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Telecommunications [Member] | A [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	3.00%
Telecommunications [Member] | BBB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	6.60%
Telecommunications [Member] | BB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.90%
Telecommunications [Member] | B [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.50%
Telecommunications [Member] | CCC [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Oil And Gas [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	8.00%
Oil And Gas [Member] | AAA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.30%
Oil And Gas [Member] | AA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	2.10%
Oil And Gas [Member] | A [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	1.30%
Oil And Gas [Member] | BBB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	3.40%
Oil And Gas [Member] | BB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.90%
Oil And Gas [Member] | B [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Oil And Gas [Member] | CCC [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Utilities [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	4.60%
Utilities [Member] | AAA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Utilities [Member] | AA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Utilities [Member] | A [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	1.60%
Utilities [Member] | BBB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	3.00%
Utilities [Member] | BB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Utilities [Member] | B [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Utilities [Member] | CCC [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Chemicals And Plastics [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	3.80%
Chemicals And Plastics [Member] | AAA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Chemicals And Plastics [Member] | AA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Chemicals And Plastics [Member] | A [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	2.30%
Chemicals And Plastics [Member] | BBB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	1.20%
Chemicals And Plastics [Member] | BB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.30%
Chemicals And Plastics [Member] | B [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Chemicals And Plastics [Member] | CCC [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Drugs [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	3.70%
Drugs [Member] | AAA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.30%
Drugs [Member] | AA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	1.60%
Drugs [Member] | A [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	1.80%
Drugs [Member] | BBB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Drugs [Member] | BB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Drugs [Member] | B [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Drugs [Member] | CCC [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Retailers (Except Food And Drug) [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	3.50%
Retailers (Except Food And Drug) [Member] | AAA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Retailers (Except Food And Drug) [Member] | AA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Retailers (Except Food And Drug) [Member] | A [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	2.10%
Retailers (Except Food And Drug) [Member] | BBB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.90%
Retailers (Except Food And Drug) [Member] | BB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.50%
Retailers (Except Food And Drug) [Member] | B [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Retailers (Except Food And Drug) [Member] | CCC [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Industrial Equipment [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	2.80%
Industrial Equipment [Member] | AAA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Industrial Equipment [Member] | AA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Industrial Equipment [Member] | A [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	2.10%
Industrial Equipment [Member] | BBB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.70%
Industrial Equipment [Member] | BB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Industrial Equipment [Member] | B [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Industrial Equipment [Member] | CCC [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Sovereign [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	3.20%
Sovereign [Member] | AAA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Sovereign [Member] | AA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	1.20%
Sovereign [Member] | A [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	1.00%
Sovereign [Member] | BBB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.70%
Sovereign [Member] | BB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.30%
Sovereign [Member] | B [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Sovereign [Member] | CCC [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Conglomerates [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	3.20%
Conglomerates [Member] | AAA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Conglomerates [Member] | AA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	2.30%
Conglomerates [Member] | A [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.90%
Conglomerates [Member] | BBB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Conglomerates [Member] | BB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Conglomerates [Member] | B [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Conglomerates [Member] | CCC [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Forest Products [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	3.00%
Forest Products [Member] | AAA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Forest Products [Member] | AA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Forest Products [Member] | A [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.50%
Forest Products [Member] | BBB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	1.10%
Forest Products [Member] | BB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	1.40%
Forest Products [Member] | B [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Forest Products [Member] | CCC [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Other [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	42.70%
Other [Member] | AAA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.00%
Other [Member] | AA [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	4.20%
Other [Member] | A [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	13.70%
Other [Member] | BBB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	17.90%
Other [Member] | BB [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	5.90%
Other [Member] | B [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.70%
Other [Member] | CCC [Member]
Credit Linked Notes By Industry And Ratings [Line Items]
Credit linked note by industry percentage	0.30%