Variable Interest Entities - Additional Information (Details) - USD ($) $ in Thousands	Feb. 28, 2021	Nov. 30, 2020
Variable Interest Entity [Line Items]
Carrying amount	$ 51,386,411	$ 47,751,997
Nonconsolidated VIEs
Variable Interest Entity [Line Items]
Carrying amount	1,200,500	1,071,000
Related party private equity vehicles | Nonconsolidated VIEs
Variable Interest Entity [Line Items]
Carrying amount	18,700	19,000
Other investment vehicles
Variable Interest Entity [Line Items]
Funded equity commitments	633,000	748,100
Carrying amount of equity investment	751,500	739,700
Equity investments	634,200	749,300
Other investment vehicles | Nonconsolidated VIEs
Variable Interest Entity [Line Items]
Carrying amount	751,500	739,700
Agency mortgage-backed securities | Nonconsolidated VIEs
Variable Interest Entity [Line Items]
Carrying amount	1,642,600	1,571,600
Non-agency mortgage and other asset-backed securities | Nonconsolidated VIEs
Variable Interest Entity [Line Items]
Carrying amount	193,800	252,000
JCP Entities | Related party private equity vehicles
Variable Interest Entity [Line Items]
Funded equity commitments	122,100	122,000
Carrying amount of equity investment	18,700	19,000
Equity investments	$ 133,000	$ 133,000