Variable Interest Entities - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Assets		$ 65,131,484	$ 34,915,599
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Liabilities assumed	$ 0
Other Investments | Other Non-Marketable Investments | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Assets		120,700	61,500
Unfunded Loan Commitment | Other Non-Marketable Investments | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss		$ 164,700	$ 95,900