Variable Interest Entities - Additional Information (Details) - USD ($) $ in Thousands	May 31, 2020	Nov. 30, 2019
Variable Interest Entity [Line Items]
Carrying amount	$ 45,084,417	$ 43,516,115
Nonconsolidated VIEs
Variable Interest Entity [Line Items]
Carrying amount	1,191,300	938,000
Related party private equity vehicles | Nonconsolidated VIEs
Variable Interest Entity [Line Items]
Carrying amount	16,600	23,000
Related party private equity vehicles | JCP Entities
Variable Interest Entity [Line Items]
Equity investments	133,000	133,000
Funded equity commitments	121,900	121,700
Carrying amount of equity investment	16,600	23,000
Other investment vehicles
Variable Interest Entity [Line Items]
Equity investments	770,600	398,600
Funded equity commitments	763,500	390,800
Carrying amount of equity investment	773,400	404,100
Other investment vehicles | Nonconsolidated VIEs
Variable Interest Entity [Line Items]
Carrying amount	773,400	404,100
Agency mortgage-backed securities | Nonconsolidated VIEs
Variable Interest Entity [Line Items]
Carrying amount	2,004,200	1,453,500
Non-agency mortgage and other asset-backed securities | Nonconsolidated VIEs
Variable Interest Entity [Line Items]
Carrying amount	$ 140,400	$ 134,800