Variable Interest Entities (Schedule of Nonconsolidated VIEs) (Details) - USD ($) $ in Thousands		May 31, 2020	Nov. 30, 2019
Variable Interest Entity [Line Items]
Assets		$ 50,283,215	$ 49,460,234
Liabilities	[1]	40,774,840	39,706,945
Maximum Exposure to Loss		1,640,600	1,796,300
VIE Assets		22,903,800	19,526,200
VIE, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Assets		1,295,500	1,107,900
Liabilities		0	600
CLOs
Variable Interest Entity [Line Items]
Maximum Exposure to Loss		70,900	505,300
VIE Assets		5,874,800	7,845,000
CLOs | VIE, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Assets		64,900	152,600
Liabilities		0	600
Consumer loan and other asset-backed vehicles
Variable Interest Entity [Line Items]
Maximum Exposure to Loss		472,900	490,600
VIE Assets		2,499,800	2,354,800
Consumer loan and other asset-backed vehicles | VIE, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Assets		336,400	358,300
Liabilities		0	0
Related party private equity vehicles
Variable Interest Entity [Line Items]
Maximum Exposure to Loss		27,700	34,300
VIE Assets		45,600	71,400
Related party private equity vehicles | VIE, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Assets		16,600	23,000
Liabilities		0	0
Other investment vehicles
Variable Interest Entity [Line Items]
Maximum Exposure to Loss		1,069,100	766,100
VIE Assets		14,483,600	9,255,000
Other investment vehicles | VIE, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Assets		877,600	574,000
Liabilities		$ 0	$ 0

[1] Total assets include assets related to variable interest entities of $709.2 million and $645.8 million at May 31, 2020 and November 30, 2019, respectively, and Total liabilities include liabilities related to variable interest entities of $2,752.3 million and $3,071.1 million at May 31, 2020 and November 30, 2019, respectively. See Note 7 for additional information related to variable interest entities.