Fair Value Disclosures - Quantitative Information about Significant Unobservable Inputs Used in Level 3 Fair Value Measurements (Detail) - USD ($)	12 Months Ended
	Nov. 30, 2015	Nov. 30, 2014
Financial Instruments Owned [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	$ 19,785,000	$ 54,190,000
Financial Instruments Owned [Member] | Corporate equity securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	20,285,000	19,814,000
Financial Instruments Owned [Member] | Corporate debt securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	20,257,000	22,766,000
Financial Instruments Owned [Member] | Collateralized debt obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	49,923,000	41,784,000
Financial Instruments Owned [Member] | Residential mortgage-backed securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	70,263,000	82,557,000
Financial Instruments Owned [Member] | Commercial mortgage-backed securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	14,326,000	26,655,000
Financial Instruments Owned [Member] | Other asset-backed securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	21,463,000	2,294,000
Financial Instruments Owned [Member] | Loans and other receivables [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	161,470,000	88,154,000
Financial Instruments Owned [Member] | Investments at fair value [Member] | Private equity securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	7,693,000	8,500,000
Financial Instruments Sold, Not Yet Purchased [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Sold, Not Yet Purchased	19,543,000	49,552,000
Financial Instruments Sold, Not Yet Purchased [Member] | Embedded conversion option [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Sold, Not Yet Purchased		693,000
Financial Instruments Sold, Not Yet Purchased [Member] | Loans and other receivables [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Sold, Not Yet Purchased	$ 10,469,000	14,450,000
Financial Instruments Sold, Not Yet Purchased [Member] | Other secured financings at fair value [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Sold, Not Yet Purchased		$ 30,825,000
Level 3 [Member] | Financial Instruments Owned [Member] | Foreign exchange options [Member] | Option model [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Discount rate/yield	47.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Foreign exchange options [Member] | Minimum [Member] | Option model [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Volatility		13.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Foreign exchange options [Member] | Maximum [Member] | Option model [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Volatility		23.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Foreign exchange options [Member] | Weighted Average [Member] | Option model [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Volatility		17.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Unfunded commitment [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 100
Level 3 [Member] | Financial Instruments Owned [Member] | Foreign exchange forward [Member] | Market approach [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant default rate/Credit spread	0.298%
Level 3 [Member] | Financial Instruments Owned [Member] | Total return swaps [Member] | Minimum [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 91.7
Level 3 [Member] | Financial Instruments Owned [Member] | Total return swaps [Member] | Maximum [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	92.4
Level 3 [Member] | Financial Instruments Owned [Member] | Total return swaps [Member] | Weighted Average [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	92.1
Level 3 [Member] | Financial Instruments Owned [Member] | Commodity forwards [Member] | Market approach [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Transaction level	9,500,000
Level 3 [Member] | Financial Instruments Owned [Member] | Commodity forwards [Member] | Discounted cash flows [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Discount rate/yield		17.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Loan commitments [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price		$ 100
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate equity securities [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Transaction level	1
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate equity securities [Member] | Scenario analysis [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Estimated recovery percentage		24.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate equity securities [Member] | Minimum [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Underlying stock price	5
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate equity securities [Member] | Maximum [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Underlying stock price	102
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate equity securities [Member] | Weighted Average [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Underlying stock price	$ 19
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate equity securities [Member] | Non-exchange traded securities [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), EBITDA multiple	4.4
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate equity securities [Member] | Non-exchange traded securities [Member] | Minimum [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), EBITDA multiple		3.4
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate equity securities [Member] | Non-exchange traded securities [Member] | Maximum [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), EBITDA multiple		4.7
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate equity securities [Member] | Non-exchange traded securities [Member] | Weighted Average [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), EBITDA multiple		3.6
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate debt securities [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Transaction level	$ 59
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate debt securities [Member] | Convertible bond model [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Discount rate/yield	86.00%	32.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Collateralized debt obligations [Member] | Minimum [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	5.00%	0.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	2.00%	0.00%
Significant Unobservable Input(s), Loss severity	25.00%	0.00%
Significant Unobservable Input(s), Yield	6.00%	2.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Collateralized debt obligations [Member] | Maximum [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	20.00%	20.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	8.00%	2.00%
Significant Unobservable Input(s), Loss severity	90.00%	70.00%
Significant Unobservable Input(s), Yield	13.00%	51.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Collateralized debt obligations [Member] | Weighted Average [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	13.00%	13.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	2.00%	2.00%
Significant Unobservable Input(s), Loss severity	52.00%	39.00%
Significant Unobservable Input(s), Yield	10.00%	16.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Residential mortgage-backed securities [Member] | Minimum [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	0.00%	1.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	1.00%	1.00%
Significant Unobservable Input(s), Loss severity	25.00%	20.00%
Significant Unobservable Input(s), Yield	1.00%	3.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Residential mortgage-backed securities [Member] | Maximum [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	50.00%	50.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	9.00%	100.00%
Significant Unobservable Input(s), Loss severity	70.00%	80.00%
Significant Unobservable Input(s), Yield	9.00%	13.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Residential mortgage-backed securities [Member] | Weighted Average [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	13.00%	13.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	3.00%	14.00%
Significant Unobservable Input(s), Loss severity	39.00%	50.00%
Significant Unobservable Input(s), Yield	6.00%	7.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Commercial mortgage-backed securities [Member] | Scenario analysis [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Estimated recovery percentage		90.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Commercial mortgage-backed securities [Member] | Minimum [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Yield	7.00%	8.00%
Significant Unobservable Input(s), Cumulative loss rate	2.00%	4.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Commercial mortgage-backed securities [Member] | Maximum [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Yield	30.00%	12.00%
Significant Unobservable Input(s), Cumulative loss rate	63.00%	72.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Commercial mortgage-backed securities [Member] | Weighted Average [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Yield	16.00%	11.00%
Significant Unobservable Input(s), Cumulative loss rate	23.00%	15.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Other asset-backed securities [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate		8.00%
Significant Unobservable Input(s), Constant default rate/Credit spread		3.00%
Significant Unobservable Input(s), Loss severity		70.00%
Significant Unobservable Input(s), Yield		7.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Other asset-backed securities [Member] | Minimum [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	6.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	3.00%
Significant Unobservable Input(s), Loss severity	55.00%
Significant Unobservable Input(s), Yield	7.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Other asset-backed securities [Member] | Minimum [Member] | Over collateralization percentage [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Over collateralization percentage	117.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Other asset-backed securities [Member] | Maximum [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	8.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	5.00%
Significant Unobservable Input(s), Loss severity	75.00%
Significant Unobservable Input(s), Yield	22.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Other asset-backed securities [Member] | Maximum [Member] | Over collateralization percentage [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Over collateralization percentage	125.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Other asset-backed securities [Member] | Weighted Average [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	7.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	4.00%
Significant Unobservable Input(s), Loss severity	62.00%
Significant Unobservable Input(s), Yield	18.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Other asset-backed securities [Member] | Weighted Average [Member] | Over collateralization percentage [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Over collateralization percentage	118.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), EBITDA multiple	10
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Minimum [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), EBITDA multiple		3.4
Significant Unobservable Input(s), Discount rate/yield	2.00%
Significant Unobservable Input(s), Yield		3.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Minimum [Member] | Scenario analysis [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Estimated recovery percentage	6.00%	10.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Minimum [Member] | Comparable pricing [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 99	$ 100
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Maximum [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), EBITDA multiple		8.2
Significant Unobservable Input(s), Discount rate/yield	17.00%
Significant Unobservable Input(s), Yield		5.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Maximum [Member] | Scenario analysis [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Estimated recovery percentage	100.00%	41.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Maximum [Member] | Comparable pricing [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 100	$ 101
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Weighted Average [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), EBITDA multiple		7.6
Significant Unobservable Input(s), Yield	12.00%	4.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Weighted Average [Member] | Scenario analysis [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Estimated recovery percentage	83.00%	36.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Weighted Average [Member] | Comparable pricing [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 99.7	$ 100.3
Level 3 [Member] | Financial Instruments Owned [Member] | Investments at fair value [Member] | Private equity securities [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Transaction level	$ 64	$ 50
Level 3 [Member] | Financial Instruments Owned [Member] | Investments at fair value [Member] | Private equity securities [Member] | Weighted Average [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Enterprise value	$ 5,200,000
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Minimum [Member] | Option model [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Volatility		13.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Maximum [Member] | Option model [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Volatility		23.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Foreign exchange options [Member] | Option model [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Volatility	45.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Foreign exchange options [Member] | Weighted Average [Member] | Option model [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Volatility		17.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Equity options [Member] | Default rate [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Default probability	0.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Unfunded commitment [Member] | Market approach [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Yield		5.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Unfunded commitment [Member] | Discounted cash flows [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	20.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	2.00%
Significant Unobservable Input(s), Loss severity	25.00%
Significant Unobservable Input(s), Yield	11.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Unfunded commitment [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant default rate/Credit spread		0.45%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Unfunded commitment [Member] | Minimum [Member] | Market approach [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Yield	3.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Unfunded commitment [Member] | Minimum [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 79	$ 89
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Unfunded commitment [Member] | Maximum [Member] | Market approach [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Yield	10.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Unfunded commitment [Member] | Maximum [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 100	100
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Unfunded commitment [Member] | Weighted Average [Member] | Market approach [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Yield	10.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Unfunded commitment [Member] | Weighted Average [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 82.6	$ 92.0
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Total return swaps [Member] | Minimum [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	91.7
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Total return swaps [Member] | Maximum [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	92.4
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Embedded conversion option [Member] | Option valuation model [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Historical volatility		19.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Commercial Loan [Member] | Comparable pricing [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	100.00	$ 100
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Other secured financings at fair value [Member] | Minimum [Member] | Comparable pricing [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price		81
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Other secured financings at fair value [Member] | Maximum [Member] | Comparable pricing [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price		100
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Other secured financings at fair value [Member] | Weighted Average [Member] | Comparable pricing [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 92.1	$ 98.7